Document:

EX-4.2

 Exhibit 4.2 
  

SIERRA METALS INC. 

Consolidated Financial Statements 

Years ended December 31, 2016 and 2015 

 March 28, 2017 

Management’s Responsibility for Financial Reporting 

Management is responsible for the preparation of the consolidated financial statements. The consolidated financial statements were prepared in
accordance with International Financing Reporting Standards (“IFRS”) and reflect management’s best estimates and judgments based on information currently available. 

Management maintains accounting systems and internal controls to produce reliable consolidated financial statements and provide reasonable
assurance that assets are properly safeguarded. 
 The consolidated financial statements have been audited by PricewaterhouseCoopers LLP
Chartered Accountants and their report outlines the scope of their examination and gives their opinion on the consolidated financial statements. 

The Board of Directors of the Company is responsible for ensuring that Management fulfills its responsibilities for financial reporting. The
Board of Directors carries out this responsibility through its Audit Committee, which is composed of three members. The committee meets various times during the year and at least once per year with the external auditors, with and without Management
being present, to review the consolidated financial statements and to discuss audit and internal control related matters. 
 The Board of Directors approved
the Company’s audited consolidated financial statements. 
  

					
			
	“Mark Brennan”	 		 	“Ed Guimaraes”
	Mark Brennan	 		 	Ed Guimaraes
	President and Chief Executive Officer	 		 	Chief Financial Officer

  
  

2  |  Page 

 Independent Auditor’s Report 

To the Shareholders of Sierra Metals Inc. 

We have audited the accompanying consolidated financial statements of Sierra Metals Inc., and its subsidiaries, which comprise the
consolidated statements of financial position as at December 31, 2016 and December 31, 2015 and the consolidated statements of income (loss), comprehensive income (loss), changes in equity and cash flows for the years then ended, and the
related notes, which comprise a summary of significant accounting policies and other explanatory information. 
 Management’s responsibility for the
consolidated financial statements 
 Management is responsible for the preparation and fair presentation of these consolidated financial
statements in accordance with International Financial Reporting Standards, as issued by the International Accounting Standards Board (IASB), and for such internal control as management determines is necessary to enable the preparation of
consolidated financial statements that are free from material misstatement, whether due to fraud or error. 
 Auditor’s responsibility 

Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We conducted our audits in
accordance with Canadian generally accepted auditing standards. Those standards require that we comply with ethical requirements and plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are
free from material misstatement. 
 An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in
the consolidated financial statements. The procedures selected depend on the auditor’s judgment, including the assessment of the risks of material misstatement of the consolidated financial statements, whether due to fraud or error. In making
those risk assessments, the auditor considers internal control relevant to the entity’s preparation and fair presentation of the consolidated financial statements in order to design audit procedures that are appropriate in the circumstances,
but not for the purpose of expressing an opinion on the effectiveness of the entity’s internal control. An audit also includes evaluating the appropriateness of accounting policies used and the reasonableness of accounting estimates made by
management, as well as evaluating the overall presentation of the consolidated financial statements. 
 We believe that the audit evidence
we have obtained in our audits is sufficient and appropriate to provide a basis for our audit opinion. 
 Opinion 

In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of Sierra Metals Inc.
and its subsidiaries as at December 31, 2016 and December 31, 2015 and their financial performance and their cash flows for the years then ended in accordance with International Financial Reporting Standards as issued by the IASB. 

signed “PricewaterhouseCoopers LLP” 

Chartered Professional Accountants, Licensed Public Accountants 

Toronto, Ontario 
 March 28, 2017 

  
  

3  |  Page 

 Sierra Metals Inc. 

Consolidated Statements of Financial Position 

December 31, 2016 and 2015 
 (In thousands of
United States dollars) 
  
  

													
	 	  	 	 	  	December 31, 2016	 	 	December 31, 2015	 
	 	  	Note	 	  	$	 	 	$	 
	 ASSETS
	  				  				 			
				
	 Current assets:
	  				  				 			
	 Cash and cash equivalents
	  				  	 	42,145	 	 	 	25,102	 
	 Trade and other receivables
	  	 	5	 	  	 	17,854	 	 	 	14,720	 
	 Income tax receivable
	  				  	 	281	 	 	 	5,060	 
	 Prepaid expenses
	  				  	 	873	 	 	 	1,082	 
	 Inventories
	  	 	6	 	  	 	21,309	 	 	 	16,435	 
		  				  	  
	  
	 	 	  
	  
	 
		  				  	 	82,462	 	 	 	62,399	 
		  				  	  
	  
	 	 	  
	  
	 
	 Non-current assets:
	  				  				 			
	 Property, plant and equipment
	  	 	7	 	  	 	281,828	 	 	 	301,826	 
	 Other assets
	  				  	 	234	 	 	 	234	 
	 Deferred income tax
	  	 	10	 	  	 	288	 	 	 	4,066	 
		  				  	  
	  
	 	 	  
	  
	 
	 Total assets
	  				  	 	364,812	 	 	 	368,525	 
		  				  	  
	  
	 	 	  
	  
	 
				
	 LIABILITIES
	  				  				 			
				
	 Current liabilities:
	  				  				 			
	 Accounts payable and accrued liabilities
	  	 	9	 	  	 	29,828	 	 	 	26,165	 
	 Income taxes payable
	  				  	 	2,357	 	 	 	430	 
	 Deferred revenue
	  	 	12	 	  	 	4,904	 	 	 	—  	 
	 Loans payable
	  	 	11	 	  	 	29,378	 	 	 	17,516	 
	 Decommissioning liability
	  	 	13	 	  	 	1,910	 	 	 	1,879	 
	 Other liabilities
	  				  	 	4,509	 	 	 	2,828	 
		  				  	  
	  
	 	 	  
	  
	 
		  				  	 	72,886	 	 	 	48,818	 
		  				  	  
	  
	 	 	  
	  
	 
	 Non-current liabilities:
	  				  				 			
	 Loans payable
	  	 	11	 	  	 	49,304	 	 	 	58,570	 
	 Deferred income tax
	  	 	10	 	  	 	43,569	 	 	 	50,147	 
	 Decommissioning liability
	  	 	13	 	  	 	11,942	 	 	 	12,098	 
	 Other liabilities
	  	 	14	 	  	 	1,149	 	 	 	1,318	 
		  				  	  
	  
	 	 	  
	  
	 
	 Total liabilities
	  				  	 	178,850	 	 	 	170,951	 
		  				  	  
	  
	 	 	  
	  
	 
				
	 EQUITY
	  				  				 			
	 Share capital
	  	 	15	 	  	 	228,326	 	 	 	227,969	 
	 Accumulated deficit
	  				  	 	(80,775	) 	 	 	(68,511	) 
	 Other reserves
	  				  	 	12,717	 	 	 	11,471	 
		  				  	  
	  
	 	 	  
	  
	 
	 Equity attributable to owners of the Company
	  				  	 	160,268	 	 	 	170,929	 
		  				  	  
	  
	 	 	  
	  
	 
	 Non-controlling interest
	  	 	16	 	  	 	25,694	 	 	 	26,645	 
		  				  	  
	  
	 	 	  
	  
	 
	 Total equity
	  				  	 	185,962	 	 	 	197,574	 
		  				  	  
	  
	 	 	  
	  
	 
		  				  				 			
		  				  	  
	  
	 	 	  
	  
	 
	 Total liabilities and equity
	  				  	 	364,812	 	 	 	368,525	 
		  				  	  
	  
	 	 	  
	  
	 

 Contingencies (note 25), Subsequent events (note 26) 

Approved on behalf of the Board and authorized for issue on March 28, 2017: 

 

					
			
	“Alberto Arias”	 		 	“Doug Cater”
	Alberto Arias	 		 	Doug Cater
	Chairman of the Board	 		 	Chairman Audit Committee

 The accompanying notes are an integral part of the consolidated financial statements. 

  
  

4  |  Page 

 Sierra Metals Inc. 

Consolidated Statements of Income (Loss) 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, except per share amounts) 

 
  

													
	 	  	 	 	  	2016	 	 	2015	 
	 	  	Note	 	  	$	 	 	$	 
	 Revenue
	  				  	 	143,180	 	 	 	134,052	 
				
	 Cost of sales
	  				  				 			
	 Mining costs
	  	 	17	 	  	 	(81,832	) 	 	 	(79,988	) 
	 Depletion, depreciation and amortization
	  	 	17	 	  	 	(44,568	) 	 	 	(46,733	) 
		  				  	  
	  
	 	 	  
	  
	 
		  				  	 	(126,400	) 	 	 	(126,721	) 
		  				  	  
	  
	 	 	  
	  
	 
		  				  				 			
		  				  	  
	  
	 	 	  
	  
	 
	 Gross profit (loss) from mining operations
	  				  	 	16,780	 	 	 	7,331	 
		  				  	  
	  
	 	 	  
	  
	 
				
	 General and administrative expenses
	  	 	17	 	  	 	(14,869	) 	 	 	(13,903	) 
	 Selling expenses
	  				  	 	(6,965	) 	 	 	(7,312	) 
	 Exploration and evaluation expenditures
	  				  	 	(1,103	) 	 	 	(2,004	) 
	 Other operating expenses
	  				  	 	—  	 	 	 	(588	) 
	 Impairment charge
	  	 	8	 	  	 	—  	 	 	 	(19,000	) 
		  				  	  
	  
	 	 	  
	  
	 
	 Income (loss) from operations
	  				  	 	(6,157	) 	 	 	(35,476	) 
		  				  	  
	  
	 	 	  
	  
	 
				
	 Other income
	  	 	18	 	  	 	1,574	 	 	 	603	 
	 Foreign currency exchange gain
	  				  	 	1,295	 	 	 	1,513	 
	 Interest expense and other finance costs
	  	 	19	 	  	 	(3,676	) 	 	 	(4,776	) 
		  				  	  
	  
	 	 	  
	  
	 
	 Income (loss) before income taxes
	  				  	 	(6,964	) 	 	 	(38,136	) 
		  				  	  
	  
	 	 	  
	  
	 
				
	 Income tax (expense) recovery:
	  				  				 			
	 Current tax expense
	  	 	10	 	  	 	(9,629	) 	 	 	(6,841	) 
	 Deferred tax recovery
	  	 	10	 	  	 	3,872	 	 	 	9,664	 
		  				  	  
	  
	 	 	  
	  
	 
		  				  	 	(5,757	) 	 	 	2,823	 
		  				  	  
	  
	 	 	  
	  
	 
	 Net income (loss)
	  				  	 	(12,721	) 	 	 	(35,313	) 
		  				  	  
	  
	 	 	  
	  
	 
				
	 Net income (loss) attributable to:
	  				  				 			
	 Shareholders of the Company
	  				  	 	(12,265	) 	 	 	(33,302	) 
	 Non-controlling interests
	  				  	 	(456	) 	 	 	(2,011	) 
		  				  	  
	  
	 	 	  
	  
	 
		  				  	 	(12,721	) 	 	 	(35,313	) 
		  				  	  
	  
	 	 	  
	  
	 
	 Weighted average shares outstanding (000s)
	  				  				 			
	 Basic
	  				  	 	161,908	 	 	 	161,013	 
	 Diluted
	  				  	 	161,908	 	 	 	161,013	 
				
	 Basic earnings (loss) per share
	  				  	 	(0.08	) 	 	 	(0.21	) 
	 Diluted earnings (loss) per share
	  				  	 	(0.08	) 	 	 	(0.21	) 

 The accompanying notes are an integral part of the consolidated financial statements. 

  
  

5  |  Page 

 Sierra Metals Inc. 

Consolidated Statements of Comprehensive Income (Loss) 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars) 
  

 

									
	 	  	2016	 	 	2015	 
	 	  	$	 	 	$	 
	 Net income (loss)
	  	 	(12,721	) 	 	 	(35,313	) 
			
	 Other comprehensive income (loss)
	  				 			
	 Items that may be subsequently classified to net income (loss):
	  				 			
	 Currency translation adjustments on foreign operations
	  	 	785	 	 	 	(2,035	) 
		  	  
	  
	 	 	  
	  
	 
	 Total comprehensive income (loss)
	  	 	(11,936	) 	 	 	(37,348	) 
		  	  
	  
	 	 	  
	  
	 
			
	 Total comprehensive income (loss) attributable to shareholders
	  	 	(11,480	) 	 	 	(35,337	) 
	 Non-controlling interests
	  	 	(456	) 	 	 	(2,011	) 
		  	  
	  
	 	 	  
	  
	 
	 Total comprehensive income (loss) attributable to shareholders
	  	 	(11,936	) 	 	 	(37,348	) 
		  	  
	  
	 	 	  
	  
	 

 The accompanying notes are an integral part of the consolidated financial statements. 

  
  

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 Sierra Metals Inc. 

Consolidated Statements of Changes in Equity 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars) 
  

 

																													
	 	  	Common Shares	 	  	 Other

reserves
	 	 	 Retained
earnings

(accumulated
deficit)
	 	 	 Total
attributable

to shareholders
	 	 	 Non-controlling

Interest
	 	 	 Total

shareholders’
equity
	 
	 	  	Shares	 	  	Amounts	 	  	 	 	 	 
	 	  	  	$	 	  	$	 	 	$	 	 	$	 	 	$	 	 	$	 
	 Balance at January 1, 2016
	  	 	161,746,240	 	  	 	227,969	 	  	 	11,471	 	 	 	(68,511	) 	 	 	170,929	 	 	 	26,645	 	 	 	197,574	 
								
	 Exercise of RSUs
	  	 	327,053	 	  	 	357	 	  	 	(357	) 	 	 	—  	 	 	 	—  	 	 	 	—  	 	 	 	—  	 
	 Share-based compensation expense
	  	 	—  	 	  	 	—  	 	  	 	819	 	 	 	—  	 	 	 	819	 	 	 	—  	 	 	 	819	 
	 Dividends paid to non-controlling interest
	  	 	—  	 	  	 	—  	 	  	 	—  	 	 	 	—  	 	 	 	—  	 	 	 	(495	) 	 	 	(495	) 
	 Total comprehensive loss
	  	 	—  	 	  	 	—  	 	  	 	785	 	 	 	(12,265	) 	 	 	(11,480	) 	 	 	(456	) 	 	 	(11,936	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Balance at December 31, 2016
	  	 	162,073,293	 	  	 	228,326	 	  	 	12,718	 	 	 	(80,776	) 	 	 	160,268	 	 	 	25,694	 	 	 	185,962	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
							
	 	  	Common Shares	 	  	 Other

reserves
	 	 	 Retained
earnings

(accumulated
deficit)
	 	 	 Total
attributable

to shareholders
	 	 	 Non-controlling

Interest
	 	 	 Total

shareholders’
equity
	 
	 	  	Shares	 	  	Amounts	 	  	 	 	 	 
	 	  	  	$	 	  	$	 	 	$	 	 	$	 	 	$	 	 	$	 
	 Balance at January 1, 2015
	  	 	160,015,045	 	  	 	225,963	 	  	 	14,195	 	 	 	(35,209	) 	 	 	204,949	 	 	 	29,544	 	 	 	234,493	 
								
	 Exercise of RSUs
	  	 	1,731,195	 	  	 	2,006	 	  	 	(2,006	) 	 	 	—  	 	 	 	—  	 	 	 	—  	 	 	 	—  	 
	 Share-based compensation expense
	  	 	—  	 	  	 	—  	 	  	 	1,317	 	 	 	—  	 	 	 	1,317	 	 	 	—  	 	 	 	1,317	 
	 Dividends paid to non-controlling interest
	  	 	—  	 	  	 	—  	 	  	 	—  	 	 	 	—  	 	 	 	—  	 	 	 	(888	) 	 	 	(888	) 
	 Total comprehensive loss
	  	 	—  	 	  	 	—  	 	  	 	(2,035	) 	 	 	(33,302	) 	 	 	(35,337	) 	 	 	(2,011	) 	 	 	(37,348	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Balance at December 31, 2015
	  	 	161,746,240	 	  	 	227,969	 	  	 	11,471	 	 	 	(68,511	) 	 	 	170,929	 	 	 	26,645	 	 	 	197,574	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 

 The accompanying notes are an integral part of the consolidated financial statements. 

  
  

7  |  Page 

 Sierra Metals Inc. 

Consolidated Statements of Cash Flows 
 For
the years ended December 31, 2016 and 2015 
 (In thousands of United States dollars) 

 
  

													
	 	  	 	 	  	2016	 	 	2015	 
	 	  	Note	 	  	$	 	 	$	 
	 Cash flows from operating activities
	  				  				 			
	 Net income (loss) from operations
	  				  	 	(12,721	) 	 	 	(35,313	) 
	 Adjustments for:
	  				  				 			
	 Items not affecting cash:
	  				  				 			
	 Depletion, depreciation and amortization
	  				  	 	45,711	 	 	 	46,840	 
	 Share-based compensation
	  				  	 	819	 	 	 	1,317	 
	 Impairment charge
	  	 	8	 	  	 	—  	 	 	 	19,000	 
	 Loss on sale of supplies
	  				  	 	—  	 	 	 	11	 
	 Interest expense and other finance costs
	  				  	 	3,676	 	 	 	4,776	 
	 Current income tax expense
	  				  	 	9,629	 	 	 	6,841	 
	 Deferred income tax recovery
	  				  	 	(3,872	) 	 	 	(9,664	) 
	 Unrealized foreign currency exchange gain (loss)
	  				  	 	1,061	 	 	 	(1,333	) 
		  				  	  
	  
	 	 	  
	  
	 
	 Operating cash flows before movements in working capital
	  				  	 	44,303	 	 	 	32,475	 
	 Net changes in non-cash working capital items
	  	 	24	 	  	 	(1,523	) 	 	 	10,417	 
	 Cash received from deferred revenue
	  	 	12	 	  	 	4,904	 	 	 	—  	 
	 Decomissioning liabilities settled
	  	 	13	 	  	 	(468	) 	 	 	(434	) 
	 Income taxes paid
	  				  	 	(3,576	) 	 	 	(11,151	) 
		  				  	  
	  
	 	 	  
	  
	 
	 Cash generated from operating activities
	  				  	 	43,640	 	 	 	31,307	 
				
	 Cash flows from investing activities
	  				  				 			
	 Capital expenditures
	  				  	 	(25,352	) 	 	 	(37,601	) 
		  				  	  
	  
	 	 	  
	  
	 
	 Cash used in investing activities
	  				  	 	(25,352	) 	 	 	(37,601	) 
		  				  	  
	  
	 	 	  
	  
	 
				
	 Cash flows from (used in) financing activities
	  				  				 			
	 Proceeds from issuance of notes payable
	  	 	11	 	  	 	3,750	 	 	 	—  	 
	 Proceeds from issuance of loans and credit facilities
	  	 	11	 	  	 	20,000	 	 	 	18,995	 
	 Repayment of loans and credit facilities
	  	 	11	 	  	 	(20,545	) 	 	 	(23,864	) 
	 Loans interest paid
	  	 	11	 	  	 	(3,674	) 	 	 	(3,417	) 
	 Dividends paid to non-controlling interest
	  				  	 	(495	) 	 	 	(888	) 
		  				  	  
	  
	 	 	  
	  
	 
	 Cash from (used in) financing activities
	  				  	 	(964	) 	 	 	(9,174	) 
		  				  	  
	  
	 	 	  
	  
	 
				
	 Effect of foreign exchange rate changes on cash and cash equivalents
	  				  	 	(281	) 	 	 	(703	) 
				
	 Increase (decrease) in cash and cash equivalents
	  				  	 	17,043	 	 	 	(16,171	) 
	 Cash and cash equivalents, beginning of period
	  				  	 	25,102	 	 	 	41,273	 
		  				  	  
	  
	 	 	  
	  
	 
	 Cash and cash equivalents, end of period
	  				  	 	42,145	 	 	 	25,102	 
		  				  	  
	  
	 	 	  
	  
	 
				
	 Supplemental cash flow information
	  	 	24	 	  				 			

 The accompanying notes are an integral part of these consolidated financial statements. 

  
  

8  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	1	 Description of business and nature of operations 

Sierra Metals Inc. (“Sierra Metals” or the “Company”) was incorporated under the Canada Business
Corporations Act on April 11, 1996, and is a Canadian and Peruvian listed mining company focused on the production, exploration and development of precious and base metals in Peru and Mexico. The Company’s key priorities are to generate
strong cash flows and to maximize shareholder value. 
 The Company’s shares are listed on the TSX and the Bolsa de
Valores de Lima (“BVL”) and its registered office is 79 Wellington St W, Suite 2100, Toronto, Ontario, M5K 1H1, Canada. 

The Company owns an 81.84% interest in the polymetallic Yauricocha Mine in Peru and a 100% interest in the Bolivar and Cusi
Mines in Mexico. In addition to its producing mines, the Company also owns various exploration projects in Mexico and Peru. 
  

	2	 Significant accounting policies 

The significant accounting policies used in the preparation of these condensed interim consolidated financial statements are
as follows: 
  

	 	(a)	 Basis of preparation 

These consolidated financial statements have been prepared in accordance with International Financial Reporting Standards
(“IFRS”) as issued by the International Accounting Standards Board (“IASB”) and interpretations issued by the International Financial Reporting Interpretations Committee (“IFRIC”). The financial statements were approved
by the Board of Directors on March 28, 2017. 
  

	 	(b)	 Basis of consolidation 

These consolidated financial statements include the accounts of the Company and its subsidiaries, which are entities
controlled by the Company. Control exists when the Company is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. Subsidiaries are
consolidated from the date that control commences until the date that control ceases. 
 Non-controlling interests represent
equity interests in subsidiaries owned by outside parties. Changes in the parent company’s ownership interest in subsidiaries that do not result in a loss of control are accounted for as equity transactions. 

  
  

9  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	2	 Significant accounting policies (continued) 

The principal subsidiaries of the Company and their geographical locations as at December 31, 2016 are as follows: 

 

					
	 Name of the subsidiary
	  	Ownership interest	  	Location
	 Dia Bras EXMIN Resources Inc.
	  	100%	  	Canada
	 Plexmar Resources Inc.
	  	100%	  	Canada
	 Sociedad Minera Corona, S. A. (“Corona”)
1
	  	81.84%	  	Perú
	 Dia Bras Peru, S. A. C. (“Dia Bras Peru”)
1
	  	100%	  	Perú
	 Sociedad Minera San Miguelito, S. A. C.
	  	100%	  	Perú
	 Dia Bras Mexicana, S. A. de C. V. (“Dia Bras Mexicana”)
	  	100%	  	México
	 Servicios de Minería de la Sierra, S. A. de C. V.
	  	100%	  	México
	 Bolívar Administradores, S. A. de C. V.
	  	100%	  	México
	 Exploraciones Mineras Dia Bras, S. A. de C. V.
	  	100%	  	México
	 EXMIN, S. A. de C. V.
	  	100%	  	México

 1The Company, through its wholly owned
subsidiary Dia Bras Peru, holds an 81.84% interest in Corona, which represents 92.33% of the voting shares. The Company consolidates Corona’s financial results and records a noncontrolling interest for the 18.16% that it does not own. 

 

	 	(c)	 Foreign currency translation 

 

	 	(i)	 Functional currency 

Items included in the financial statements of each of the Company’s subsidiaries are measured using the currency of the
primary economic environment in which the entity operates (the “functional currency”). 
 The functional currency
of Sierra Metals Inc., the parent entity, is the Canadian dollar (“C$”). The functional currency of the Mexican and Peruvian subsidiaries is the United States dollar. 

 

	 	(ii)	 Presentation currency 

The financial statements of entities that have a functional currency different from the presentation currency are translated
into the presentation currency as follows: assets and liabilities – at the closing rate at the date of the statement of financial position, income and expenses – at the average rate of the period (as this is considered a reasonable
approximation of the actual rates prevailing at the transaction dates). All resulting differences are recognized in other comprehensive income as cumulative translation adjustments. 

 

	 	(iii)	 Transactions and balances 

Foreign currency transactions are translated into the functional currency using the exchange rates prevailing at the dates of
the transactions. Foreign exchange gains and losses resulting from the settlement of foreign currency transactions and from the translation at exchange rates of monetary assets and liabilities denominated in currencies other than an entities’
functional currency are recognized in the consolidated statement of loss. 

  
  

10  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	2	 Significant accounting policies (continued) 

 

	 	(d)	 Cash and cash equivalents 

Cash and cash equivalents include cash on hand, deposits held with banks, and other short-term highly liquid investments with
original maturities of three months or less. 
  

	 	(e)	 Financial Instruments 

 

	 	(i)	 Initial measurement 

Financial assets and liabilities are recognized when the Company becomes a party to the contractual provisions of the
instrument. 
  

	 	(ii)	 Classification and subsequent measurement 

Subsequent measurement of financial assets and liabilities depends on the classification of such as assets and liabilities:

  

	 	•	 	 Classified at Fair Value Through Profit or Loss (“FVTPL”): A financial asset or liability is
measured at fair value with changes in fair values recognized in the consolidated statement of income (loss) in the period in which they arise. A financial asset or liability is classified in this category if acquired principally for the purpose of
selling or repurchasing in the short term. Transaction costs directly attributable to financial assets and liabilities classified as at FVTPL are expensed in the period in which they are incurred. Generally, the Company does not acquire financial
assets for the purpose of selling in the short term. Derivatives are also included in this category unless they are designated as hedges. When the Company enters into derivative contracts these are designed to reduce the Company’s risk exposure
related to assets, liabilities or anticipated transactions. 

 Derivatives embedded in other financial
instruments or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to their host contracts. Commodity-based embedded derivatives resulting from provisional sales prices of metals in
concentrate are recognised in revenue as described in note 2(l). 
  

	 	•	 	 Loans and receivables: Loans and receivables are non-derivative financial assets with fixed or
determinable payments that are not quoted in an active market. Loans and receivables are initially recognized at the amount expected to be received less, when material, a discount to reduce the loans and receivables to fair value. Subsequently,
loans and receivables are measured at amortized cost using the effective interest rate method less any provision for impairment. 

The effective interest rate method is a method of calculating the amortized cost of a financial asset or financial liability
and of allocating the interest income or interest expense over the term of the financial asset or financial liability, respectively. The interest rate used in the calculation, is the rate that exactly discounts estimated future cash receipts or
payments throughout the term of the financial instrument to the net carrying amount of the financial asset or liability. 
  

	 	•	 	 Other financial liabilities: other financial liabilities are initially measured at fair value net of
transaction costs incurred and are subsequently stated at amortised cost using the effective interest rate method. 

  
  

11  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	2	 Significant accounting policies (continued) 

 

	 	(iii)	 Impairment of financial assets 

At each reporting date, the Company assesses whether there is objective evidence that a financial asset (other than a
financial asset classified as FVTPL) is impaired. A financial asset is impaired and impairment losses are recognized when there is objective evidence of impairment as a result of one or more events that have occurred after initial recognition of the
asset and these have a negative impact on the estimated future cash flows of the financial asset, which can be reliably estimated. An impairment loss is recognized in net income (loss) for the period measured as the difference between the financial
assets’ carrying amount and the present value of estimated future cash flows (excluding future credit losses that have not been incurred) discounted at the financial asset’s effective interest rate at initial recognition. 

Impairment losses on financial assets carried at amortized cost can be reversed in subsequent periods if the amount of the
loss decreases and the decrease can be related objectively to an event occurring after the impairment was recognized. 
  

	 	(f)	 Segment reporting 

Operating segments are reported in a manner consistent with the internal reporting provided to the chief operating
decision-maker. The chief operating decision-maker is responsible for allocating resources and assessing performance of the operating segments and has been identified as the President and Chief Executive Officer of the Company. 

 

	 	(g)	 Inventories 

Inventories consist of concentrates, ore stockpiles, supplies and spare parts. Concentrates include stockpiled concentrates at
milling operations or at warehouses. Stockpiled ore is comprised of in-process mineralized material awaiting processing at milling facilities and materials for use in milling operations. Concentrates and stockpiled ore are valued at the lower of
average production cost and net realizable value (“NRV”). Concentrates and stockpiled ore inventory costs include all direct costs incurred in production including direct labor and materials, freight and amortization, and directly
attributable overhead costs. NRV is calculated as the estimated price at the time of sale based on prevailing metal market prices less estimated future costs to convert the inventories into saleable form and estimated costs to sell. If the carrying
value of inventory exceeds NRV, a write-down is recognized as production costs of sales in the consolidated statement of income (loss). If there is a subsequent increase in the value of the inventory, the previous write-downs to NRV are reversed up
to cost to the extent that the related inventory has not been sold. 
 The supplies and spare parts inventories will be used
for exploration and production and are valued at the lower of average cost and net realizable value. Cost includes acquisition, freight and other directly attributable costs. 

  
  

12  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	2	 Significant accounting policies (continued) 

 

	 	(h)	 Exploration and evaluation expenditure 

Exploration and evaluation expenditure comprises costs that are directly attributable to: 

 

	 	•	 	 Researching and analysing existing exploration data; 

 

	 	•	 	 Conducting geological studies, exploratory drilling and sampling; 

 

	 	•	 	 Examining and testing extraction and treatment methods; and /or 

 

	 	•	 	 Compiling pre-feasibility and feasibility studies 

Exploration expenditures are costs incurred in the search for resources suitable for commercial exploitation and these costs
are expensed in the period incurred. Evaluation expenditures are costs incurred in determining the technical feasibility and commercial viability of a mineral resource. Evaluation expenditures are capitalized when there is a high degree of
confidence in the project’s viability and thus it is probable that future economic benefits will flow to the Company. Any items of property, plant and equipment used for exploration and evaluation are capitalised within property, plant and
equipment. Capitalized evaluation expenditures are considered to be tangible assets as they form part of the underlying mineral property and are recorded within property, plant and equipment – exploration and evaluation expenditures.

  

	 	(i)	 Property, plant and equipment 

Property, plant and equipment is stated at cost, less accumulated depreciation and impairment losses. The cost of an item of
property, plant and equipment comprises its purchase price, any costs directly attributable to bringing the assets to the location and condition necessary for it to be capable of operating in the manner intended by management and the estimated close
down and restoration costs associated with the asset, and for qualifying assets, the associated borrowing costs. Once a mining project has been established as commercially viable, expenditure other than on land, buildings, plant and equipment is
capitalized under ‘Mining properties’ together with any amount capitalized relating to that mining project from ‘Exploration and evaluation’. 

Where an item of property, plant and equipment is comprised of major components with different useful lives, the components
are accounted for as separate items of property, plant and equipment and depreciated over their estimated useful lives. 

Costs associated with commissioning new assets, in the period before they are capable of operating in the manner intended by
management, are capitalized. Revenue generated during the development stage from the sale of concentrate and related costs can be deducted from capitalized costs only if the production of the saleable material is directly attributable to bringing
the asset to the condition necessary for it to be capable of operating in the manner intended by management. 
 Development
costs incurred after the commencement of production are capitalised to the extent they are expected to give rise to future economic benefits and these costs can be measured reliably. Repairs and maintenance costs are charged to the consolidated
statement of income (loss) during the period in which they are incurred. 
 Property, plant and equipment is depreciated
over its useful life, or over the remaining life of the mine if shorter. Depreciation commences when the asset is available for use. Land is not depreciated. The major categories of property, plant and equipment are depreciated on a straight line
basis using the following average estimated useful lives below: 

  
  

13  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	2	 Significant accounting policies (continued) 

 

					
	 Useful lives
	    	Years	 
	 Vehicles, furniture and other assets
	    	 	3 to10	 
	 Machinery and equipment
	    	 	5 to 20	 
	 Bulidings and other constructions
	    	 	5 to 50	 

 Mineral properties are depleted over the life of the mine using the units of production
method. In applying the units of production method, depletion is normally calculated using the quantity of material to be extracted in current and future periods based on proven and probable reserves or measured and indicated resources. Such
non-reserve material may be included in depletion calculations in limited circumstances and where there is a high degree of confidence in its economic extraction. 

The Company conducts an annual review of residual values, useful lives, depletion and depreciation methods used for property,
plant and equipment. Changes to estimated residual values or useful lives are accounted for prospectively. 
  

	 	(j)	 Impairment of non-financial assets 

Property, plant and equipment and intangible assets with finite lives are reviewed for impairment whenever events or changes
in circumstances indicate that the carrying amount may not be recoverable. Impairment is assessed at the level of cash generating units (‘CGUs’). The recoverable amount is the higher of an asset’s fair value less costs to sell or
value in use. 
 Fair value less costs to sell is determined as the amount that would be obtained from the sale of the asset
in an arm’s length transaction. The best evidence of fair value is the value obtained from an active market or binding sales agreement. Where this information is not available, fair value can be estimated as the present value of future cash
flows expected to be realized from the continued use of the asset including expansion projects. Value in use is determined as the present value of expected future cash flows to be realized from the continued use of the asset in its present condition
and from its ultimate disposal. 
 Non-financial assets that have suffered impairment are tested for possible reversal of
the impairment whenever events or changes in circumstances indicate that the impairment may have reversed. 
  

	 	(k)	 Borrowing costs 

Borrowing costs directly attributable to the acquisition, construction or production of qualifying assets are capitalized and
included in the carrying amounts of those assets until they are ready for their intended use. All other borrowing costs are recognized as an expense in the period incurred. 
  

	 	(l)	 Revenue recognition 

Revenue from the sale of concentrates is recognized when the significant risks and rewards of ownership have been transferred
to the customer; the sales price and costs can be measured reliably, the Company has no significant continuing involvement and it is probable that the economic benefits will flow to the Company. The risks and rewards of ownership are transferred
when title and insurance risk have passed to the customer and the concentrate has been delivered to a contractually agreed location. 

Revenue from the sale of concentrate is recorded net of charges for shipping, refining and smelting. Revenue from the sale of
material by-products is included within revenue. 

  
  

14  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	2	 Significant accounting policies (continued) 

Revenues from metal concentrates are provisionally priced based upon provisional assays and quoted metal prices. Revenues are
recorded at the time title passes to the buyer. The Company records adjustments to revenues at each reporting period based on the quoted forward prices for the expected settlement period. Accordingly, the value of the concentrate receivable changes
as the underlying commodity prices change. This pricing mechanism gives rise to an embedded derivative in accounts receivable that is recognized at fair value with changes in value recorded in revenue. Adjustments for weights and assays are recorded
when results are determinable or on final settlement. 
  

	 	(m)	 Deferred revenue 

The Company recognizes deferred revenue on the statement of financial position when it has received cash in return for an
obligation to deliver concentrate in a future reporting period. As product is delivered under such an agreement, the deferred revenue balance is reduced as revenue is recognized on the statement of income. 

 

	 	(n)	 Share capital 

Common shares are classified as equity. Incremental costs directly attributable to the issuance of the shares are recognized
as a deduction from equity. 
  

	 	(o)	 Share-based payments 

The fair value of the estimated number of stock options and restricted share units (“RSUs”) awarded to employees,
officers and directors that will eventually vest, determined as of the date of grant, is recognized as share-based compensation expense over the vesting period of the stock options and RSUs, with a corresponding increase to equity. The fair value of
each tranche is determined using the Black-Scholes option pricing model with market related inputs as of the date of grant. The fair value of RSUs is the market value of the underlying shares as of the date of grant. The number of awards expected to
vest is reviewed at least annually, with any change in the estimate recognized immediately in stock based compensation expense with a corresponding adjustment to equity. 
  

	 	(p)	 Share repurchases 

The Company deducts from contributed surplus any excess of consideration paid over book value where the Company has
repurchased any of its own common shares. Book value is calculated as the weighted average price of the shares issued and outstanding prior to the cancellation date. 

  
  

15  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	2	 Significant accounting policies (continued) 

 

	 	(q)	 Earnings (loss) per share 

Basic earnings (loss) per share (“EPS”) is calculated by dividing the net income (loss) for the period attributable
to the shareholders of the Company by the weighted average number of common shares outstanding during the period. 
 Diluted
EPS is calculated by adjusting the weighted average number of common shares outstanding for dilutive instruments. The number of shares included with respect to options, warrants and similar instruments is computed using the treasury stock method.
The Company’s potentially dilutive common shares comprise stock options granted to employees. In periods of loss, basic and diluted EPS are the same, as the effect of dilutive instruments is anti-dilutive. 

 

	 	(r)	 Income taxes 

Tax expense comprises current and deferred income and resource taxes. Current income, deferred income and resources taxes are
recognized in profit or loss except to the extent that it relates to a business combination, or items recognized directly in equity or in other comprehensive income. 

Current tax is the expected tax payable or receivable on the taxable income or loss for the year, using tax rates enacted or
substantively enacted at the reporting date, and any adjustment to tax payable in respect of previous years. 
 Deferred tax
is recognized in respect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for taxation purposes. Deferred tax is not recognized for the following temporary
differences: the initial recognition of assets or liabilities in a transaction that is not a business combination and that affects neither accounting nor taxable profit or loss, and differences relating to investments in subsidiaries and jointly
controlled entities to the extent that the parent is able to control the timing of the reversal of the temporary difference and it is probable that they will not reverse in the foreseeable future. Deferred tax is measured at the tax rates that are
expected to be applied to temporary differences when they reverse, based on the laws that have been enacted or substantively enacted by the reporting date. 

Deferred tax assets and liabilities are offset if there is a legally enforceable right to offset current tax liabilities and
assets, and they relate to income taxes levied by the same tax authority on the same taxable entity, or on different tax entities, but they intend to settle current tax liabilities and assets on a net basis or their tax assets and liabilities will
be realized simultaneously. 
 A deferred tax asset is recognized for unused tax losses, tax credits and deductible
temporary differences, to the extent that it is probable that future taxable profits will be available against which they can be utilized. Deferred tax assets are reviewed at each reporting date and are reduced to the extent that it is no longer
probable that the related tax benefit will be realized. 
  

	 	(s)	 Decommissioning and restoration liabilities 

Decommissioning and restoration costs include the dismantling and demolition of infrastructure, the removal of residual
materials and the remediation of disturbed areas. These costs are a normal consequence of mining activity and the majority of these expenditures are expected to be incurred at the end of the life of mine. Estimated decommissioning and restoration
costs are provided in the accounting period when the obligation arising from the related disturbance occurs, based on the net present value of the estimated future costs discounted using the credit adjusted risk free rate. This provision is adjusted
in each reporting period to reflect known developments, e.g. revisions to costs estimates and the timing of cash out flows. 

  
  

16  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	2	 Significant accounting policies (continued) 

The initial decommissioning and restoration provision together with other movements resulting from changes in estimated cash
flows or the credit adjusted risk free rates is capitalized within property, plant and equipment and amortized over the life of the asset to which it relates except where it relates to a closed mine where the expenses are recognized in the statement
of loss. Provision is made for the estimated present value of costs of environmental clean-up obligations outstanding as at the date of the statement of financial position, and these costs are charged to the income statement as an operating cost.

 The amortization or unwinding of the discount applied in establishing the net present value of provision is accreted to
the income statement in each accounting period with each interest charge included as a financing cost rather than as an operating cost. 
  

	3	 Significant accounting estimates and judgments 

In the application of the Company’s accounting policies, which are described in note 2, management is required to make
judgements, estimates and assumptions about the effects of uncertain future events on the carrying amounts of assets and liabilities. The estimates and associated assumptions are based on management’s best knowledge of the relevant facts and
circumstances and historical experience. Actual results may differ from these estimates, potentially having a material future effect on the Company’s consolidated financial statements. The estimates and underlying assumptions are reviewed on an
ongoing basis. Revisions to accounting estimates are recognised in the period in which the estimate is revised if the revision affects only that period, or in the period of the revision and future periods if the revision affects both current and
future periods. 
 The following are the significant judgements that management has made in the process of applying the
Company’s accounting policies and that have the most significant effect on the amounts recognised in the consolidated financial statements: 
  

	 	(a)	 Impairment review of asset carrying values 

In accordance with the Company’s accounting policy (note 2(j)), at every reporting period, the Company assesses whether
there are any indicators that the carrying value of its assets or Cash Generating Units (“CGUs”) may be impaired, which is a significant management judgment. Where there is an indication that the carrying amount of an asset may not be
recoverable, the Company prepares a formal estimate of the recoverable amount by analyzing discounted cash flows. The resulting valuations are particularly sensitive to changes in estimates such as long term commodity prices, exchange rates, sales
volume, operating costs, and discount rates. In the event of impairment, if there is a subsequent adverse change in any of the assumptions or estimates used in the discounted cash flow model, this could result in a further impairment of the asset.
Also, in accordance with the Company’s accounting policy (note 2(h)), the Company capitalizes evaluation expenditures when there is a high degree of confidence that these costs are recoverable and have a probable future benefit. As at
December 31, 2015, management assessed its exploration and evaluation expenditures for impairment and recognized an impairment charge of $19,000 (note 8) related to its Cusi Mine. As at December 31, 2016 the Company assessed the carrying
value of its long-lived assets and exploration and evaluation expenditures and determined that no impairment was required. 

  
  

17  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	3	 Significant accounting estimates and judgments (continued) 

 

	 	(b)	 Mineral reserves and resources 

The Company estimates mineral reserves and resources based on information prepared by qualified persons as defined in
accordance with the Canadian Securities Administrators’ National Instrument (“NI”) 43-101. These estimates form the basis of the Company’s life of mine (“LOM”) plans, which are used for a number of important and
significant accounting purposes, including: the calculation of depletion expense and impairment charges, forecasting the timing of the payment of decommissioning costs and future taxes. There are significant uncertainties inherent in the estimation
of mineral reserves and the assumptions used, including commodity prices, production costs, recovery rates and exchange rates. These assumptions may change significantly when new information becomes available and could result in mineral reserves
being revised, which in turn would impact depletion expense, asset carrying values and the provision for decommissioning costs. 
  

	 	(c)	 Deferred tax assets and liabilities 

The Company’s management makes significant estimates and judgments in determining the Company’s tax expense for the
period and the deferred tax assets and liabilities. Management interprets tax legislation in a variety of jurisdictions and makes estimates of the expected timing of the reversal of deferred tax assets and liabilities. In addition, management makes
estimates related to expectations of future taxable income based on cash flows from operations and the application of existing tax laws in each jurisdiction. Assumptions used in the cash flow forecast are based on management’s estimates of
future production and sales volume, commodity prices, operating costs, capital expenditures, dividends, and decommissioning and reclamation expenditures. These estimates are subject to risk and uncertainty and could result in an adjustment to the
deferred tax provision and a corresponding credit or charge to the statement of loss. The Company is subject to assessments by various tax authorities who may interpret the tax laws differently. These differences may impact the final amount or the
timing of the payment of taxes. The Company provides for such differences where known based on management’s best estimates of the probable outcome of these matters. 
  

	 	(d)	 Decommissioning and restoration liabilities costs 

The Company’s provision for decommissioning and restoration costs is based on management’s best estimate of the
present value of the future cash outflows required to settle the liability. In determining the liability, management makes estimates about the future costs, inflation, foreign exchange rates, risks associated with the cash flows, and the applicable
risk-free interest rates for discounting future cash flows. Changes in any of these estimates could result in a change in the provision recognized by the Company. Also, the ultimate costs of environmental disturbance are uncertain and cost estimates
can vary in response to many factors including changes to the relevant legal requirements, the emergence of new restoration techniques or experience at other mine sites. 

Changes in decommissioning and restoration liabilities are recorded with a corresponding change to the carrying amounts of the
assets to which they relate. Adjustments made to the carrying amounts of the asset can result in a change to the depreciation charged in the consolidated statement of loss. 
  

	 	(e)	 Functional currency 

The functional currency for each of the Company’s subsidiaries is the currency of the primary economic environment in
which the entity operates. The Company has determined that the functional currency of each entity is the U.S. dollar. Determination of functional currency may involve certain judgements to determine the primary economic environment and the Company
reconsiders the functional currency of its entities if there is a change in events and conditions which determined the primary economic environment. 

  
  

18  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	4	 Adoption of new accounting standards and future accounting changes 

Future accounting changes 

The following standards and amendments to existing standards have been published and are mandatory for annual periods
beginning January 1, 2018, or later periods: 
 IFRS 9, Financial Instruments: Recognition and measurement (“IFRS 9”)

 The IASB issued its completed version of IFRS 9, Financial Instruments (“IFRS 9”) in July 2014. The
completed standard provides revised guidance on the recognition and measurement of financial assets and liabilities. It also introduces a new expected credit loss model for calculating impairment for financial assets and liabilities. The new hedging
guidance that was issued in November 2013 is incorporated into this new final standard. 
 This final version of IFRS 9 will
be effective for annual periods beginning on or after January 1, 2018, with early adoption permitted. The Company is currently evaluating the extent of the impact of the adoption of this standard. 

IFRS 15, Revenue from Contracts with Customers (“IFRS 15”) 

IFRS 15, was issued in May 2014, which covers principles for reporting the nature, amount, timing and uncertainty of revenue
and cash flows arising from contracts with customers. IFRS 15 is effective for annual periods beginning on or after January 1, 2018. The Company has not yet determined the potential impact of adopting this standard on its consolidated financial
statements. 
 IFRS 16, Leases (“IFRS 16”) 

In January 2016, the IASB issued this standard which is effective for periods beginning on or after January 1, 2019,
which replaces the current guidance in IAS 17, Leases, and is to be applied either retrospectively or a modified retrospective approach. Early adoption is permitted, but only in conjunction with IFRS 15, Revenue from Contracts with
Customers. Under IAS 17, lessees were required to make a distinction between a finance lease (on balance sheet) and an operating lease (off balance sheet). IFRS 16 now requires lessees to recognize a lease liability reflective of future lease
payments and a “right-of-use asset” for virtually all lease contracts. The Company has not yet determined the effect of adoption of IFRS 16 on its consolidated financial statements. 

Amendments to IAS 7, Statements of Cash Flows (“IAS 7”) 

The amendments require disclosures that enable users of financial statements to evaluate changes in liabilities arising from
financing activities, including both changes arising from cash flow and non-cash changes. The amendments apply prospectively for annual periods beginning on or after January 1, 2017, with earlier application permitted. The Company intends to
adopt the amendments to IAS 7 in its financial statements for the annual period beginning on January 1, 2017. The Company is in the process of determining the impact of the amendments to IAS 7 on its consolidated financial statements. 

  
  

19  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	5	 Trade and other receivables 

 

									
	 	  	December 31,
2016
$	 	  	December 31,
2015
$	 
	 Trade receivables
	  	 	12,840	 	  	 	8,562	 
	 Sales tax receivables
	  	 	4,617	 	  	 	5,936	 
	 Other receivables
	  	 	397	 	  	 	222	 
		  	  
	  
	 	  	  
	  
	 
		  	 	17,854	 	  	 	14,720	 
		  	  
	  
	 	  	  
	  
	 

  

	6	 Inventories 

 

									
	 	  	December 31,
2016
$	 	  	December 31,
2015
$	 
	 Stockpiles
	  	 	1,585	 	  	 	2,870	 
	 Concentrates
	  	 	6,647	 	  	 	3,631	 
	 Supplies and spare parts
	  	 	13,077	 	  	 	9,934	 
		  	  
	  
	 	  	  
	  
	 
		  	 	21,309	 	  	 	16,435	 
		  	  
	  
	 	  	  
	  
	 

 Cost of sales are comprised of production costs of sales and depletion, depreciation and
amortization, and represent the cost of inventories recognized as an expense for the years ended December 31, 2016 and 2015 of $126,400 and $126,721, respectively. Supplies and spare parts inventory as at December 31, 2016 is stated net of
a provision of $1,384 (2015 – $1,224) to write inventories down due to obsolescence. Supplies and spare parts inventory held at NRV at December 31, 2016 was $6,561 (2015 – $5,134). During the year ended December 31, 2016, the
Company wrote down stockpile and concentrate inventory to its NRV, recording a charge of $1,365 (2015- $1,088). Stockpile and concentrate inventory held at NRV as at December 31, 2016 was $375 (2015 – $212). 

  
  

20  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	7	 Property, plant and equipment 

 

																					
	 	  	 	 	  	 	 	  	 	 	  	Exploration and	 	  	 	 
	 	  	Plant and	 	  	Mining	 	  	Assets under	 	  	evaluation	 	  	 	 
	 Cost
	  	equipment	 	  	properties	 	  	construction	 	  	expenditure	 	  	Total $	 
	 Balance as of January 1, 2015
	  	 	165,605	 	  	 	409,433	 	  	 	33,529	 	  	 	29,874	 	  	 	638,441	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
						
	 Additions
	  	 	4,149	 	  	 	7,342	 	  	 	16,558	 	  	 	9,053	 	  	 	37,102	 
	 Change in estimate of decomissioning liability
	  	 	(2,040	) 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	(2,040	) 
	 Borrowing costs
	  	 	—  	 	  	 	—  	 	  	 	491	 	  	 	—  	 	  	 	491	 
	 Disposals
	  	 	(294	) 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	(294	) 
	 Foreign exchange revaluation
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	(16	) 	  	 	(16	) 
	 Transfers
	  	 	25,146	 	  	 	1,559	 	  	 	(26,705	) 	  	 	—  	 	  	 	—  	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Balance as of December 31, 2015
	  	 	192,566	 	  	 	418,334	 	  	 	23,873	 	  	 	38,911	 	  	 	673,684	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
						
	 Additions
	  	 	4,130	 	  	 	6,490	 	  	 	8,649	 	  	 	6,600	 	  	 	25,869	 
	 Disposals
	  	 	(325	) 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	(325	) 
	 Foreign exchange revaluation
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	(158	) 	  	 	(158	) 
	 Transfers
	  	 	6,316	 	  	 	379	 	  	 	(6,316	) 	  	 	(379	) 	  	 	—  	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Balance as of December 31, 2016
	  	 	202,687	 	  	 	425,203	 	  	 	26,206	 	  	 	44,974	 	  	 	699,070	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
						
	 	  	 	 	  	 	 	  	 	 	  	Exploration and	 	  	 	 
	 	  	Plant and	 	  	Mining	 	  	Assets under	 	  	evaluation	 	  	 	 
	 Accumulated depreciation
	  	equipment	 	  	properties	 	  	construction	 	  	expenditure	 	  	Total $	 
	 Balance as of January 1, 2015
	  	 	92,828	 	  	 	215,294	 	  	 	—  	 	  	 	—  	 	  	 	308,122	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
						
	 Depletion, depreciation and amortization
	  	 	13,837	 	  	 	31,128	 	  	 	—  	 	  	 	—  	 	  	 	44,965	 
	 Impairment charge (Note 8)
	  	 	—  	 	  	 	5,959	 	  	 	—  	 	  	 	13,041	 	  	 	19,000	 
	 Disposals
	  	 	(229	) 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	(229	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Balance as of December 31, 2015
	  	 	106,436	 	  	 	252,381	 	  	 	—  	 	  	 	13,041	 	  	 	371,858	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
						
	 Depletion, depreciation and amortization
	  	 	15,818	 	  	 	29,616	 	  	 	—  	 	  	 	—  	 	  	 	45,434	 
	 Disposals
	  	 	(50	) 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	(50	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Balance as of December 31, 2016
	  	 	122,204	 	  	 	281,997	 	  	 	—  	 	  	 	13,041	 	  	 	417,242	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		  				  				  				  				  			
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Net Book Value – December 31, 2016
	  	 	80,483	 	  	 	143,206	 	  	 	26,206	 	  	 	31,933	 	  	 	281,828	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Net Book Value – December 31, 2015
	  	 	86,130	 	  	 	165,953	 	  	 	23,873	 	  	 	25,870	 	  	 	301,826	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Net Book Value – December 31, 2014
	  	 	72,777	 	  	 	194,139	 	  	 	33,529	 	  	 	29,874	 	  	 	330,319	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 For the year ended December 31, 2016, depletion and depreciation expense of $45,711
(2015: $46,840) has been charged to depletion, depreciation and amortization and $1,159 (2015: $1,318) has been capitalized to inventory. 

During the year ended December 31, 2016, the Company has capitalized borrowing costs amounting to $491 (2015 – $127)
on qualifying assets. Borrowing costs were capitalized at the weighted average rate of 5.25%. 

  
  

21  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	8	 Impairment of mining interests 

As at December 31, 2015, impairment indicators were specifically identified for the Cusi Mine as a result of declining
metal prices and the current capital expenditure program related to the development of the property and mine exploration costs not yet resulting in the addition of recoverable silver ounces to the property. In accordance with the Company’s
accounting policy, the Company performed an impairment assessment for the Cusi Mine cash generating unit (“CGU”) as at December 31, 2015. The recoverable amount of the Cusi Mine was determined based on the after-tax discounted cash
flows expected to be derived from the property’s fair-market value less estimated costs to sell (“FVLCS”). As a result of impairment tests performed as at December 31, 2015, the Company recorded an impairment loss of $19,000
which was allocated entirely against capitalized exploration and evaluation expenditures on the Cusi Mine. Management’s estimate of the FVLCS is classified as Level 3 under the fair value hierarchy. As at December 31, 2016, management
assessed its mining property assets and exploration and evaluation expenditures for impairment indicators and determined that no impairment was required. 
  

	9	 Accounts payable and accrued liabilities 

 

									
	 	  	December 31,	 	  	December 31,	 
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Trade payables
	  	 	18,428	 	  	 	14,619	 
	 Other payables and accrued liabilities
	  	 	11,400	 	  	 	11,546	 
		  	  
	  
	 	  	  
	  
	 
		  	 	29,828	 	  	 	26,165	 
		  	  
	  
	 	  	  
	  
	 

 All accounts payable and accrued liabilities are expected to be settled within 12 months. 

 

	10	 Current and deferred income tax liability 

 

	 	(a)	 Income and resource taxes 

 

									
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Current Tax Expense
	  				  			
			
	 Current income tax
	  	 	9,629	 	  	 	6,841	 
		  	  
	  
	 	  	  
	  
	 
		  	 	9,629	 	  	 	6,841	 
		  	  
	  
	 	  	  
	  
	 
	 Deferred Tax Recovery
	  				  			
			
	 Deferred Tax Recovery
	  	 	(3,872	) 	  	 	(9,664	) 
		  	  
	  
	 	  	  
	  
	 
		  	 	(3,872	) 	  	 	(9,664	) 
		  	  
	  
	 	  	  
	  
	 
		  				  			
		  	  
	  
	 	  	  
	  
	 
	 Total tax expense (recovery)
	  	 	5,757	 	  	 	(2,823	) 
		  	  
	  
	 	  	  
	  
	 

  
  

22  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	10	 Current and deferred income tax liability (Continued) 

 

	 	(b)	 Tax rate reconciliation 

A reconciliation between income tax expense and the product of loss before income taxes multiplied by the combined Canadian
federal and provincial income tax rate for the period ended December 31 is as follows: 
  

									
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Income (loss) before income taxes
	  	 	(6,964	) 	  	 	(38,136	) 
			
	 Expected Tax Rate @ 26.00% (2015 – 26.00%)
	  	 	(1,780	) 	  	 	(10,283	) 
	 Effect of tax rate differences
	  	 	2,365	 	  	 	(1,763	) 
	 Stock based compensation costs
	  	 	195	 	  	 	310	 
	 Other Non-deductible expenses
	  	 	(8,531	) 	  	 	829	 
	 Unrealized foreign exchange income
	  	 	42	 	  	 	(271	) 
	 Inflation Adjustment for Mexico tax purposes
	  	 	(214	) 	  	 	(312	) 
	 Expired losses
	  	 	—  	 	  	 	354	 
	 Change in benefit of other temporary differences not recognized
	  	 	8,273	 	  	 	6,627	 
	 Foreign exchange and other
	  	 	2,506	 	  	 	(629	) 
	 Mining royalties
	  	 	2,901	 	  	 	2,315	 
		  	  
	  
	 	  	  
	  
	 
		  	 	5,757	 	  	 	(2,823	) 
		  	  
	  
	 	  	  
	  
	 

  

	 	(c)	 Deferred tax asset and liability 

Deferred tax assets have not been recognized in respect of the following temporary differences: 

 

									
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Non-capital losses
	  	 	25,777	 	  	 	32,732	 
	 Property, plant and equipment
	  	 	38	 	  	 	19	 
	 Mineral properties
	  	 	9,889	 	  	 	12,358	 
	 Other
	  	 	(87	) 	  	 	192	 
		  	  
	  
	 	  	  
	  
	 
		  	 	35,617	 	  	 	45,301	 
		  	  
	  
	 	  	  
	  
	 

 The significant components and movements of the Company’s net deferred tax assets and
liabilities are as follows: 
  

																					
	 	  	Balance	 	  	 	 	  	Balance	 	  	 	 	  	Balance	 
	 	  	January 1,	 	  	Change in	 	  	December 31,	 	  	Change in	 	  	December 31,	 
	 	  	2015	 	  	2015	 	  	2015	 	  	2016	 	  	2016	 
	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 
	 Mining assets
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 
	 Inventory
	  	 	424	 	  	 	(34	) 	  	 	390	 	  	 	66	 	  	 	456	 
	 Other items
	  	 	(41	) 	  	 	(323	) 	  	 	(364	) 	  	 	243	 	  	 	(121	) 
	 Provisions
	  	 	934	 	  	 	(262	) 	  	 	672	 	  	 	257	 	  	 	929	 
	 Decommissioning liabilities
	  	 	4,034	 	  	 	(320	) 	  	 	3,714	 	  	 	380	 	  	 	4,094	 
	 Non-capital losses
	  	 	12,011	 	  	 	(2,101	) 	  	 	9,910	 	  	 	(3,235	) 	  	 	6,675	 
	 Property, Plant, and equipment
	  	 	(5,462	) 	  	 	879	 	  	 	(4,583	) 	  	 	648	 	  	 	(3,935	) 
	 Mining assets
	  	 	(67,581	) 	  	 	13,655	 	  	 	(53,926	) 	  	 	3,626	 	  	 	(50,300	) 
	 Inventory
	  	 	(2,229	) 	  	 	(1,058	) 	  	 	(3,287	) 	  	 	348	 	  	 	(2,939	) 
	 Other items
	  	 	237	 	  	 	1,595	 	  	 	1,832	 	  	 	(791	) 	  	 	1,041	 
	 Deferred revenue
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	1,471	 	  	 	1,471	 
	 Provisions
	  	 	1,936	 	  	 	(3,434	) 	  	 	(1,498	) 	  	 	(32	) 	  	 	(1,530	) 
	 Mining royalties
	  	 	1,090	 	  	 	(87	) 	  	 	1,003	 	  	 	(125	) 	  	 	878	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		  	 	(54,647	) 	  	 	8,510	 	  	 	(46,137	) 	  	 	2,856	 	  	 	(43,281	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

  
  

23  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	10	 Current and deferred income tax liability (continued) 

 

	 	(d)	 Tax losses 

In Canada, the Company has aggregate tax losses not recognized of $26,051 (December 31, 2015 – $21,581) expiring in
periods from 2025 to 2036. Deferred tax assets have not been recognized in respect of these losses because it is not probable that future taxable profit will be available against which the company can utilise the benefits there from. 

Also, the Company has $8,578 of capital losses that are without expiry as at December 31, 2016 (December 31,
2015 – $8,578). 
  

	 	(e)	 Unrecognized deferred tax liabilities 

As at December 31, 2016, the Company has taxable temporary difference of $13,477 (2015 – $16,069) relating to
investments in subsidiaries that has not been recognized because the Company controls whether the liability will be incurred and it is satisfied that it will not be incurred in the foreseeable future. 

 

	11	 Loans payable 

 

									
	 	  	December 31,	 	  	December 31,	 
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Current
	  				  			
			
	 Acquisition loan with Banco de Credito del Peru (a)
	  	 	5,784	 	  	 	1,257	 
	 Operating loan with Banco de Credito del Peru (b)
	  	 	6,211	 	  	 	3,659	 
	 Note payable to Scotiabank in Peru (c)
	  	 	14,750	 	  	 	11,000	 
	 Other credit facilities (d)
	  	 	1,179	 	  	 	—  	 
	 Loan with FIFOMI (e)
	  	 	1,454	 	  	 	1,600	 
		  	  
	  
	 	  	  
	  
	 
		  	 	29,378	 	  	 	17,516	 
		  	  
	  
	 	  	  
	  
	 
	 Non-current
	  				  			
			
	 Acquisition loan with Banco de Credito del Peru (a)
	  	 	40,036	 	  	 	45,762	 
	 Operating loan with Banco de Credito del Peru (b)
	  	 	6,238	 	  	 	7,428	 
	 Loan with FIFOMI (e)
	  	 	3,030	 	  	 	5,380	 
		  	  
	  
	 	  	  
	  
	 
		  	 	49,304	 	  	 	58,570	 
		  	  
	  
	 	  	  
	  
	 
		  				  			
		  	  
	  
	 	  	  
	  
	 
	 Total loans payable
	  	 	78,682	 	  	 	76,086	 
		  	  
	  
	 	  	  
	  
	 

  
  

24  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	11	 Loans payable (continued) 

 

	 	(a)	 Corona Acquisition Loan with Banco de Credito del Peru S.A. (“BCP”) 

On May 24, 2011, the Company’s wholly owned subsidiary Dia Bras Peru entered into a loan agreement with BCP
amounting to $150,000. After deducting financing costs of $3,750, the net proceeds were $146,250. The proceeds from this loan were used to fund a portion of the purchase consideration for the acquisition of the Company’s 81.84% interest in
Corona in Peru. The loan was repayable over 5 years ending on May 24, 2016 and carried interest at a rate of LIBOR plus 4.5% per annum, payable quarterly in arrears. 

On August 7, 2015, Dia Bras Peru signed an amended agreement with BCP for the then outstanding debt balance of $48,000.
The most significant amendments to the agreement were: 
  

	 	•	 	 The remaining $48M due on the facility was split into 2 tranches 

 

	 	•	 	 Tranche 1, in the amount of $24M has quarterly principal repayments of $1.5M beginning in November 2016 and
ending in August 2020 

  

	 	•	 	 Tranche 2, in the amount of $24M has no quarterly principal repayments and to be repaid in full in August 2020

  

	 	•	 	 One year principal repayment grace period 

 

	 	•	 	 Reduced Interest rate equal to 3.65% plus 3M LIBOR vs previous rate of 4.15% plus 3M LIBOR

  

	 	•	 	 Term of the Facility extended for 5 Years 

These amendments did not trigger the de-recognition rules under IAS 39 – Financial Instruments. 

Principal repayments totalling $1,500 have been made for the year ended December 31, 2016 (2015 – $6,858). 

The loan is recorded at amortized cost and is being accreted to face value over 5 years using an effective interest rate of
4.71%. An amortization expense related to the transaction costs for $300 has been recorded for the year ended December 31, 2016 (2015 – $372). Interest payments totalling $2,084 have been made for the year ended December 31, 2016
(2015 – $2,140). 
 The loan with BCP is secured by a pledge over Dia Bras Peru’s interest in Corona voting shares
and is guaranteed by the Company. The Company is in compliance with all financial covenants as at December 31, 2016. 
  

	 	(b)	 Corona Operating Loan with BCP 

On October 17, 2013, the Company’s subsidiary Corona, in which the Company has an interest of 81.84%, entered into a
credit facility with the BCP for up to $60,000. The credit facility is for a 5 year term and the funds can be drawn within the first 3 years in tranches of up to $40,000 during the first year, up to $30,000 during the second year and up to $20,000
during the third year. The loan bears interest of LIBOR plus 4.5% and the loan principal and interest are payable in quarterly installments over the term of the loan with the first payment due 15 months after the closing of the credit facility. The
loan is guaranteed by the collection rights and future cash flows generated from the sale of ore concentrates and other products. The loan contains certain financial covenants, events of default and other provisions which are customary for a
transaction of this nature. These covenants include maintaining an equity balance at the Corona level higher than $30 million, maintaining a Debt Service Coverage ratio higher than 1.1x, and maintaining a Net Financial Debt/EBITDA ratio lower than
2.0x. 

  
  

25  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	11	 Loans payable (continued) 

The Company is in compliance with all financial covenants as at December 31, 2016. 

On June 29, 2016, $5,000 was drawn from this facility bearing an interest rate of three months LIBOR plus 4.5%. 

Principal repayments totalling $3.750 have been made for the year ended December 31, 2016 (2015 – $3,750). Interest
payments totalling $716 have been made for the year ended December 31, 2016 (2015 – $656). 
  

	 	(c)	 Corona Notes payable with Scotiabank Peru 

In order to fund its short term working capital needs, Corona repaid and drew down the following notes payable: 

 

	 	•	 	 A revolving credit facility from Scotiabank Peru for $11,000 bearing an annual interest rate of 1.99% matured
and was repaid in full on May 6, 2016. 

  

	 	•	 	 On May 6, 2016 a new $15,000 revolving credit facility with Scotiabank was obtained. $11,000 was drawn to
repay the $11,000 that was outstanding on the previous facility. The new credit facility bears an interest rate of three month LIBOR plus 2.00%. 

  

	 	•	 	 On February 8, 2016, $3,750 was drawn from this facility which bears an interest rate of LIBOR plus 1.9%.

  

	 	(d)	 Other credit facilities 

 

	 	•	 	 Pre-Export Finance Facility (“the Pre-Export Finance Facility”): On March 2, 2016, Dia
Bras Mexicana (“DBM”) entered into a $4,000 Pre-Export Finance Facility with METAGRI S.A de C.V (“METAGRI”), to whom DBM sells all of its lead concentrate. The $4,000 facility was drawn down on March 2, 2016 and bears
interest of 5.0% plus 1 year LIBOR. 

 Repayment will take place against deliveries of lead
concentrate for the period of April 2016 up to and including June 2017. METAGRI will deduct seven hundred dollars per dry metric ton of material from the purchase price payable to DBM in the provisional payment for each dry metric ton of the
material delivered to METAGRI under the sales contract, subject to a minimum monthly deduction of two hundred and seventy thousand dollars (“the minimum monthly deduction”) plus the accrued interest. If DBM fails to deliver the material
during any month from April 2016 until and including June 2017, and/or the value of the material during any month is lower than the minimum monthly deduction plus the accrued interest, DBM will repay METAGRI the short-fall within two business days
after METAGRI’s written notice. 
 The deductions will be made until such time as the Pre-Export Finance Facility has
been fully amortized and the interest had been fully serviced. DBM has agreed that METAGRI can set-off any final payment deferred under the sales contract against any outstanding Pre-Export Finance Facility or interest to ensure full
amortization of the principal and service the interest. 
 During the year ended December 31, 2016, DBM has made
repayments totaling $2,822 (2015 – $2,256). 

  
  

26  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	11	 Loans payable (continued) 

 

	 	(e)	 FIFOMI loan 

 

	 	•	 	 During January 2015, the Company’s Mexican Subsidiary, Dia Bras Mexicana S.A. de C.V, received a loan of
MXP$120 million from Nacional Financiera, Sociedad Fiduciaria del Fideicomiso de Fomento Minero (“FIFOMI”) to be used for working capital purposes and capital expenditures, specifically the expansion of the Piedras Verdes Plant.

 On February 2, 2015, DBM drew MXP$120 million (US$7,995). After deducting transaction costs of
US$124, net proceeds were US$7,871. 
 Monthly principal repayments will take place over four years beginning in January
2016 at an interest rate of TIIE + 3%. Interest payments began in February 2015 and during the year ended December 31, 2016, DBM has made interest payments of $357 (MXP$6,659) (2015 – $324). Principal payments of $1,473
(MXP$27,500) (2015 – $Nil) have been made during the year ended December 31, 2016. 
  

	12	 Deferred revenue 

During December 2016 the Company received a payment of $4,904 for copper concentrate stockpiled at the Piedras Verdes Plant
which was awaiting a new filter in order to further process and dry the concentrate. The Company entered into an agreement with their customer, Trafigura Mexico S.A. de C.V. (“Trafigura”) who agreed to pay for the concentrate in advance
with certain stipulations. The Company must pay interest to Trafigura on the advance payment at the LIBOR 3-month rate plus 3% from the date the advance payment was made to the date when the first provisional payment for the product is otherwise
due. The 4,100 DMT of copper concentrate stockpiled must be delivered according to the following schedule: 705 DMT during January 2017, 1,200 DMT during February 2017, 1,200 DMT during March 2017 and 950 DMT during April 2017. Since the copper
concentrate inventory has not been shipped to Trafigura during 2016, and the advance payment was received during 2016, as per the terms of the agreement and holding certificate granted, the payment was recorded as deferred revenue and will be drawn
down monthly once the concentrate is shipped to Trafigura during 2017. Interest has been accrued according with the terms of the agreement and has been recorded in accrued liabilities. 

  
  

27  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	13	 Decommissioning liability 

 

									
	 	  	December 31,
2016
$	 	  	December 31,
2015
$	 
	 Balance, beginning of period
	  	 	13,977	 	  	 	14,825	 
			
	 Liabilities settled during the period
	  	 	(468	) 	  	 	(434	) 
	 Interest cost
	  	 	343	 	  	 	1,694	 
	 Revisions and new estimated cash flows
	  	 	—  	 	  	 	(2,108	) 
		  	  
	  
	 	  	  
	  
	 
	 Balance, end of period
	  	 	13,852	 	  	 	13,977	 
		  	  
	  
	 	  	  
	  
	 
	 Less: current portion
	  	 	(1,910	) 	  	 	(1,879	) 
		  	  
	  
	 	  	  
	  
	 
	 Long-term decommissioning liability
	  	 	11,942	 	  	 	12,098	 
		  	  
	  
	 	  	  
	  
	 

 The Company’s decommissioning liability represents the present value of estimated costs
for required future decommissioning and other site restoration activities. The majority of the decommissioning and site restoration expenditures occur at the end of each operation’s life. During 2016 and 2015, the decommissioning liability was
calculated based on the following key assumptions: 
  

																	
	 	  	2016	 	  	2015	 
	 	  	Mexico	 	  	Peru	 	  	Mexico	 	  	Peru	 
	 Estimated undiscounted cash flows ($)
	  	 	1,021	 	  	 	16,206	 	  	 	1,124	 	  	 	15,848	 
	 Discount rate (%)
	  	 	6.0	 	  	 	4.5	 	  	 	5.0	 	  	 	6.0	 
	 Settlement period (years)
	  	 	6	 	  	 	5-10	 	  	 	7	 	  	 	4-6	 

  

	14	 Other liabilities 

 

									
	 	  	December 31,
2016
$	 	  	December 31,
2015
$	 
	 Current
	  				  			
	 Profit-sharing and other employee related obligations (a)
	  	 	4,509	 	  	 	2,828	 
		  	  
	  
	 	  	  
	  
	 
	 Non-current
	  				  			
	 Other employee related obligations
	  	 	1,149	 	  	 	1,318	 
		  	  
	  
	 	  	  
	  
	 

  

	 	(a)	 Profit sharing and other employee related obligations 

As at December 31, 2016, there is a provision amounting to $2,356 for employee profit sharing in Peru and $2,153 for
wages, salaries and other employee benefits outstanding (December 31, 2015 – $1,580 and $1,248, respectively). 

  
  

28  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	15	 Share capital and share-based payments 

 

	 	(a)	 Authorized capital 

The Company has an unlimited amount of authorized common shares with no par value. 

 

	 	(b)	 Stock options 

The changes in stock options outstanding during the years ended December 31, 2016 and December 31, 2015 was as
follows: 
  

																	
	 	  	December 31, 2016	 	  	December 31, 2015	 
	 	  	Number
of
options	 	  	Weighted
average
exercise
price C$	 	  	Number
of options	 	  	Weighted
average
exercise
price C$	 
	 Outstanding, beginning of period
	  	 	7,116	 	  	 	3.40	 	  	 	110,202	 	  	 	2.42	 
	 Granted
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 
	 Exercised
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 
	 Forfeited
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 
	 Expired
	  	 	(7,116	) 	  	 	3.40	 	  	 	(103,086	) 	  	 	2.36	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Outstanding, end of period
	  	 	—  	 	  	 	—  	 	  	 	7,116	 	  	 	3.40	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Exercisable, end of period
	  	 	—  	 	  	 	—  	 	  	 	7,116	 	  	 	3.40	 

 The following table summarizes information relating to stock options outstanding and
exercisable as at December 31, 2016: 
  

																	
	 	  	December 31, 2016	 	  	December 31, 2015	 
	 	  	Options outstanding	 	  	Options exercisable	 
	 Exercise prices (C$)
	  	Options
outstanding	 	  	Weighted
average
remaining
contractual
life years	 	  	Options
exercisable	 	  	Weighted
average
remaining
contractual
life years	 
					
	 2.31 – 3.40
	  	 	—  	 	  	 	—  	 	  	 	7,116	 	  	 	0.9	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

  
  

29  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	15	 Share capital and share-based payments (continued) 

 

	 	(c)	 Restricted share units (“RSUs”) 

The changes in RSU’s issued during the years ended December 31, 2016 and 2015 was as follows: 

 

									
	 	  	December 31,
2016	 	  	December 31,
2015	 
	 Outstanding, beginning of period
	  	 	874,788	 	  	 	1,693,373	 
	 Granted
	  	 	1,278,753	 	  	 	1,234,682	 
	 Exercised
	  	 	(327,053	) 	  	 	(1,731,195	) 
	 Forfeited
	  	 	(54,611	) 	  	 	(322,072	) 
		  	  
	  
	 	  	  
	  
	 
	 Outstanding, end of period
	  	 	1,771,877	 	  	 	874,788	 
		  	  
	  
	 	  	  
	  
	 

 On June 29, 2012, the Company’s shareholders approved the RSU plan, whereby RSUs may
be granted to directors, officers, consultants or employees at the discretion of the Board of Directors. The RSU plan provides for the issuance of common shares from treasury upon the exercise of vested RSUs at no additional consideration. The
current maximum number of common shares authorized for issue under the RSU plan is 8,000,000. The RSUs have vesting conditions determined by the Board of Directors. 

During the year ended December 31, 2016, the Company granted one tranche of RSU’s totalling 1,278,753 which had a
fair value of C$1.02 based on the closing share price at grant date. RSUs exercised during the year ended December 31, 2016 had a weighted average fair value of C$1.51 and the RSUs expired had a weighted average fair value of C$1.52 (2015
– C$1.36 and C$1.69, respectively). As at December 31, 2016, the weighted average fair value of the RSUs outstanding is C$1.16 (2015 – C$1.52). 

The total RSU expense recognized during the year ended December 31, 2016 was $819 with a corresponding credit to other
reserves (2015 – $1,317). 

  
  

30  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	16	 Non-controlling interest 

Set out below is the summarized financial information of our subsidiary Corona which has a material non-controlling interest
(note 2(b)). The information below is before intercompany eliminations and after fair value adjustments on acquisition of the entity. 
  

									
	 Summarized balance sheet
	  				  			
	 	  	December 31,
2016
$	 	  	December 31,
2015
$	 
	 Current
	  				  			
	 Assets
	  	 	62,731	 	  	 	43,047	 
	 Liabilities
	  	 	(42,147	) 	  	 	(30,930	) 
		  	  
	  
	 	  	  
	  
	 
	 Total current net assets
	  	 	20,584	 	  	 	12,117	 
		  	  
	  
	 	  	  
	  
	 
	 Non-current
	  				  			
	 Assets
	  	 	180,196	 	  	 	200,324	 
	 Liabilities
	  	 	(58,801	) 	  	 	(62,781	) 
		  	  
	  
	 	  	  
	  
	 
	 Total non-current net assets
	  	 	121,395	 	  	 	137,543	 
		  	  
	  
	 	  	  
	  
	 
	 Net assets
	  	 	141,979	 	  	 	149,660	 
		  	  
	  
	 	  	  
	  
	 
			
	 Summarized income statement
	  				  			
	 	  	For the year ended December 31,	 
	 	  	2016
$	 	  	2015
$	 
	 Revenue
	  	 	97,290	 	  	 	80,113	 
	 Income (loss) before income tax
	  	 	1,400	 	  	 	(12,077	) 
	 Income tax recovery (expense)
	  	 	(3,913	) 	  	 	1,003	 
		  	  
	  
	 	  	  
	  
	 
	 Total income (loss)
	  	 	(2,513	) 	  	 	(11,074	) 
		  	  
	  
	 	  	  
	  
	 
	 Total income (loss) attributable to non-controlling interests
	  	 	(456	) 	  	 	(2,011	) 
		  	  
	  
	 	  	  
	  
	 
	 Dividends paid to non-controlling interests
	  	 	495	 	  	 	888	 
		  	  
	  
	 	  	  
	  
	 
			
	 Summarized cash flows
	  				  			
	 	  	For the year ended December 31,	 
	 	  	2016
$	 	  	2015
$	 
	 Cash flows from operating activities
	  				  			
	 Cash generated from operating activities
	  	 	34,902	 	  	 	24,078	 
	 Net changes in non cash working capital items
	  	 	(5,885	) 	  	 	2,423	 
	 Decomissioning liabilities settled
	  	 	(331	) 	  	 	(423	) 
	 Income taxes paid
	  	 	(3,562	) 	  	 	(11,151	) 
		  	  
	  
	 	  	  
	  
	 
	 Net cash generated from operating activities
	  	 	25,124	 	  	 	14,927	 
		  	  
	  
	 	  	  
	  
	 
	 Net cash used in investing activities
	  	 	(11,587	) 	  	 	(12,119	) 
		  	  
	  
	 	  	  
	  
	 
	 Net cash from (used in) financing activities
	  	 	1,516	 	  	 	(9,299	) 
		  	  
	  
	 	  	  
	  
	 
	 Effect of foreign exchange rate changes on cash and cash
	  	 	4	 	  	 	(363	) 
		  	  
	  
	 	  	  
	  
	 
	 Increase in cash and cash equivalents
	  	 	15,057	 	  	 	(6,854	) 
		  	  
	  
	 	  	  
	  
	 
	 Cash and cash equivalents, beginning of year
	  	 	21,820	 	  	 	28,674	 
		  	  
	  
	 	  	  
	  
	 
	 Cash and cash equivalents, end of year
	  	 	36,877	 	  	 	21,820	 
		  	  
	  
	 	  	  
	  
	 

  
  

31  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	17	 Expenses by nature 

Mining costs include mine production costs, milling and transport costs, royalty expenses, site administration costs but not
the primary mine development costs which are capitalized and depreciated over the specific useful life or reserves related to that development and ore included in depreciation and amortization. The mining costs for the year ended December 31,
2016 and 2015 relate to the Yauricocha, Bolivar and Cusi Mines. 
  

	 	(a)	 Mining costs 

 

									
	 	  	2016
$	 	  	2015
$	 
	 Employee compensation and benefits
	  	 	17,857	 	  	 	14,966	 
	 Third party and contractors costs
	  	 	36,473	 	  	 	31,797	 
	 Depreciation
	  	 	44,568	 	  	 	46,733	 
	 Consumables
	  	 	25,999	 	  	 	23,978	 
	 Other
	  	 	1,503	 	  	 	9,247	 
		  	  
	  
	 	  	  
	  
	 
		  	 	126,400	 	  	 	126,721	 
		  	  
	  
	 	  	  
	  
	 

  

	 	(b)	 General and administrative expenses 

 

									
	 	  	2016
$	 	  	2015
$	 
	 Salaries and benefits
	  	 	6,851	 	  	 	6,861	 
	 Consulting and professional fees
	  	 	3,043	 	  	 	2,436	 
	 Other
	  	 	368	 	  	 	139	 
	 Office expenses
	  	 	1,384	 	  	 	1,014	 
	 Marketing and communication expenses
	  	 	478	 	  	 	852	 
	 Share-based compensation expense
	  	 	807	 	  	 	807	 
	 Listing and filing fees
	  	 	199	 	  	 	233	 
	 Director expenses
	  	 	1,446	 	  	 	1,190	 
	 Travelling expense
	  	 	293	 	  	 	371	 
		  	  
	  
	 	  	  
	  
	 
		  	 	14,869	 	  	 	13,903	 
		  	  
	  
	 	  	  
	  
	 

  

	18	 Other income (expenses) 

 

									
	 	  	2016
$	 	  	2015
$	 
	 Gain on sale of supplies and fixed assets
	  	 	59	 	  	 	210	 
	 Interest income
	  	 	89	 	  	 	67	 
	 Reversal of legal accrual
	  	 	704	 	  	 	—  	 
	 Miscellaneous income (expenses)
	  	 	722	 	  	 	326	 
		  	  
	  
	 	  	  
	  
	 
		  	 	1,574	 	  	 	603	 
		  	  
	  
	 	  	  
	  
	 

  
  

32  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	19	 Interest expense and other finance costs 

 

									
	 	  	2016
$	 	  	2015
$	 
	 Interest expense on BCP loan
	  	 	2,084	 	  	 	2,140	 
	 Interest expense on other liabilities
	  	 	920	 	  	 	409	 
	 Amortization of loan transaction costs
	  	 	329	 	  	 	533	 
	 Interest cost on decommissioning liability
	  	 	343	 	  	 	1,694	 
		  	  
	  
	 	  	  
	  
	 
		  	 	3,676	 	  	 	4,776	 
		  	  
	  
	 	  	  
	  
	 

  

	20	 Segment reporting 

The Company primarily manages its business on the basis of the geographical location of its operating mines. The
Company’s operating segments are based on the reports reviewed by the senior management group that are used to make strategic decisions. The Chief Executive Officer considers the business from a geographic perspective considering the
performance of the Company’s business units. The corporate division only earns income that is considered to be incidental to the activities of the Company and thus it does not meet the definition of an operating segment; as such it has been
included within “other reconciling items.” 
 The reporting segments identified are the following: 

 

	 	•	 	 Peru – Yauricocha Mine 

 

	 	•	 	 Mexico – Bolivar and Cusi Mines 

The following is a summary of the reported amounts of net income (loss) and the carrying amounts of assets and liabilities by
operating segment: 

  
  

33  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	20	 Segment reporting (continued) 

 

																					
	 	  	Peru	 	  	Mexico	 	  	Mexico	 	  	Canada	 	  	 	 
	 	  	Yauricocha Mine	 	  	Bolivar Mine	 	  	Cusi Mine	 	  	Corporate	 	  	Total	 
	 Year ended December 31, 2016
	  	$	 	  	$	 	  	$	 	  	$	 
	 Revenue
	  	 	97,290	 	  	 	33,267	 	  	 	12,623	 	  	 	—  	 	  	 	143,180	 
						
	 Production cost of sales
	  	 	(53,705	) 	  	 	(23,064	) 	  	 	(5,063	) 	  	 	—  	 	  	 	(81,832	) 
	 Depletion of mineral property
	  	 	(24,384	) 	  	 	(3,426	) 	  	 	(752	) 	  	 	—  	 	  	 	(28,562	) 
	 Depreciation and amortization of property, plant and equipment
	  	 	(7,812	) 	  	 	(6,719	) 	  	 	(1,475	) 	  	 	—  	 	  	 	(16,006	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cost of sales
	  	 	(85,901	) 	  	 	(33,209	) 	  	 	(7,290	) 	  	 	—  	 	  	 	(126,400	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Gross profit from mining operations
	  	 	11,389	 	  	 	58	 	  	 	5,333	 	  	 	—  	 	  	 	16,780	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Income (loss) from operations
	  	 	1,149	 	  	 	(7,125	) 	  	 	3,757	 	  	 	(3,938	) 	  	 	(6,157	) 
	 Interest expense and other finance costs
	  	 	(3,093	) 	  	 	(335	) 	  	 	(583	) 	  	 	335	 	  	 	(3,676	) 
	 Other income
	  	 	919	 	  	 	540	 	  	 	119	 	  	 	(4	) 	  	 	1,574	 
	 Foreign currency exchange gain (loss)
	  	 	(312	) 	  	 	1,578	 	  	 	346	 	  	 	(317	) 	  	 	1,295	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Income (loss) before income tax
	  	 	(1,337	) 	  	 	(5,342	) 	  	 	3,639	 	  	 	(3,924	) 	  	 	(6,964	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Income tax (expense) recovery
	  	 	(3,913	) 	  	 	(1,511	) 	  	 	(333	) 	  	 	—  	 	  	 	(5,757	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Net income (loss) from operations
	  	 	(5,250	) 	  	 	(6,853	) 	  	 	3,306	 	  	 	(3,924	) 	  	 	(12,721	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
					
	 December 31, 2016
	  	Peru	 	  	Mexico	 	  	Canada	 	  	 	 
	 Total assets
	  	 	238,181	 	  				  	 	117,402	 	  	 	9,229	 	  	 	364,812	 
	 Non-current assets
	  	 	180,260	 	  				  	 	97,329	 	  	 	8,341	 	  	 	285,930	 
	 Total liabilities
	  	 	142,981	 	  				  	 	33,170	 	  	 	2,699	 	  	 	178,850	 
		  	  
	  
	 	  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

  
  

34  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	20	 Segment reporting (continued) 

 

																					
	 	  	Peru	 	  	Mexico	 	  	Mexico	 	  	Canada	 	  	 	 
	 	  	Yauricocha Mine	 	  	Bolivar Mine	 	  	Cusi Mine	 	  	Corporate	 	  	Total	 
	 Year ended December 31, 2015
	  	$	 	  	$	 	  	$	 	  	$	 
	 Revenue
	  	 	80,113	 	  	 	41,839	 	  	 	12,100	 	  	 	—  	 	  	 	134,052	 
						
	 Production cost of sales
	  	 	(45,940	) 	  	 	(27,238	) 	  	 	(6,810	) 	  	 	—  	 	  	 	(79,988	) 
	 Depletion of mineral property
	  	 	(27,561	) 	  	 	(4,317	) 	  	 	(589	) 	  	 	—  	 	  	 	(32,467	) 
	 Depreciation and amortization of property, plant and equipment
	  	 	(6,793	) 	  	 	(5,978	) 	  	 	(1,495	) 	  	 	—  	 	  	 	(14,266	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cost of sales
	  	 	(80,294	) 	  	 	(37,533	) 	  	 	(8,894	) 	  	 	—  	 	  	 	(126,721	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Gross profit (loss) from mining operations
	  	 	(181	) 	  	 	4,306	 	  	 	3,206	 	  	 	—  	 	  	 	7,331	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Income (loss) from operations
	  	 	(9,795	) 	  	 	(6,711	) 	  	 	(15,794	) 	  	 	(3,176	) 	  	 	(35,476	) 
	 Interest expense and other finance costs
	  	 	(4,294	) 	  	 	(386	) 	  	 	(96	) 	  	 	—  	 	  	 	(4,776	) 
	 Other income
	  	 	7	 	  	 	474	 	  	 	118	 	  	 	4	 	  	 	603	 
	 Foreign currency exchange gain (loss)
	  	 	(836	) 	  	 	85	 	  	 	21	 	  	 	2,243	 	  	 	1,513	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Income (loss) before income tax
	  	 	(14,918	) 	  	 	(6,538	) 	  	 	(15,751	) 	  	 	(929	) 	  	 	(38,136	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Income tax (expense) recovery
	  	 	(1,003	) 	  	 	3,252	 	  	 	574	 	  	 	—  	 	  	 	2,823	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Net income (loss) from operations
	  	 	(15,921	) 	  	 	(3,286	) 	  	 	(15,177	) 	  	 	(929	) 	  	 	(35,313	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
					
	 December 31, 2015
	  	 	 	  	 	 	  	 	 	  	 	 
	 Total assets
	  	 	244,093	 	  	 	116,250	 	  				  	 	8,182	 	  	 	368,525	 
	 Non-current assets(1)
	  	 	200,609	 	  	 	95,272	 	  				  	 	6,845	 	  	 	302,726	 
	 Total liabilities
	  	 	144,403	 	  	 	25,294	 	  				  	 	1,254	 	  	 	170,951	 
		  	  
	  
	 	  	  
	  
	 	  				  	  
	  
	 	  	  
	  
	 

 For the year ended December 31, 2016, 68% of the revenues ($97,290) were from two
customers based in Peru and the remaining 32% of the revenues ($45,890) were from two customers based in Mexico. In Peru, the two customers accounted for 65% and 35% of the revenues. In Mexico, the two customers accounted for 73% and 27% of the
revenues. 
 For the year ended December 31, 2015, 60% of the revenues ($80,113) were from two customers based in Peru
and the remaining 40% of the revenues ($53,939) were from two customers based in Mexico. In Peru, the two customers accounted for 66% and 34% of the revenues. In Mexico, the two customers accounted for 78% and 22% of the revenues. 

As at December 31, 2016, the trade receivable balance of $12,840 includes amounts outstanding of $1,126 and $11,674 from
two customers in Mexico and two customers in Peru, respectively. 

  
  

35  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	21	 Financial instruments and financial risk management 

The Company’s financial instruments include cash and cash equivalents, trade receivables, financial assets, accounts
payable and loans payable. 
  

	 	(a)	 Financial assets and liabilities by category 

 

																					
	 	  	Loans and	 	  	 	 	  	Available	 	  	Other
financial	 	  	 	 
	 	  	receivables	 	  	FVTPL	 	  	for sale	 	  	liabilities	 	  	Total	 
	 At December 31, 2016
	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 
	 Financial assets
	  				  				  				  				  			
	 Cash and cash equivalents
	  	 	42,145	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	42,145	 
	 Trade receivables (1)
	  	 	12,840	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	12,840	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total Financial assets
	  	 	54,985	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	54,985	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
						
	 Financial liabilities
	  				  				  				  				  			
	 Accounts payable
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	18,428	 	  	 	18,428	 
	 Loans payable
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	78,682	 	  	 	78,682	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total Financial liabilities
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	97,110	 	  	 	97,110	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
						
	 	  	Loans and	 	  	 	 	  	Available	 	  	Other
financial	 	  	 	 
	 	  	receivables	 	  	FVTPL	 	  	for sale	 	  	liabilities	 	  	Total	 
	 At December 31, 2015
	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 
	 Financial assets
	  				  				  				  				  			
	 Cash and cash equivalents
	  	 	25,102	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	25,102	 
	 Trade receivables (1)
	  	 	8,562	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	8,562	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total Financial assets
	  	 	33,664	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	33,664	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
						
	 Financial liabilities
	  				  				  				  				  			
	 Accounts payable
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	14,619	 	  	 	14,619	 
	 Loans payable
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	76,086	 	  	 	76,086	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total Financial liabilities
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	90,705	 	  	 	90,705	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

  

	 	(1)	 Trade receivables exclude sales and income tax receivables. 

 

	 	(b)	 Fair value of financial instruments 

As at December 31, 2016 and 2015, the fair value of the financial instruments approximates their carrying value. 

 

	 	(c)	 Fair value hierarchy 

Financial instruments carried at fair value are categorized based on a three level valuation hierarchy that reflects the
significance of inputs used in making the fair value measurements as follows: 
 Level 1 – quoted prices (unadjusted)
in active markets for identical assets and liabilities 
 Level 2 – inputs other than quoted prices included in Level 1
that are observable for the asset or liability, either directly (i.e., as prices) or indirectly (i.e., derived from prices) 

  
  

36  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	21	 Financial instruments and financial risk management (continued) 

The Company’s metal concentrate sales are subject to provisional pricing with the selling prices adjusted at the end of
the quotational period. The Company’s trade receivables are marked-to-market at each reporting period based on quoted forward prices for which there exists an active commodity market. 

Level 3 – inputs for the asset or liability that are not based on observable market data. 

At December 31, 2016 and 2015, the levels in the fair value hierarchy into which the Company’s financial assets and
liabilities are measured and recognized on the Consolidated Statement of Financial Position are categorized as follows: 
  

																																	
	 	  	December 31, 2016	 	  	December 31, 2015	 
	 	  	Level 1	 	  	Level 2	 	  	Level 3	 	  	Total	 	  	Level 1	 	  	Level 2	 	  	Level 3	 	  	Total	 
	Recurring measurements	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 
	 Trade receivables (1)
	  	 	—  	 	  	 	12,840	 	  	 	—  	 	  	 	12,840	 	  	 	—  	 	  	 	8,562	 	  	 	—  	 	  	 	8,562	 
	 Property, Plant and Equipment(2)
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	42,000	 	  	 	42,000	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		  	 	—  	 	  	 	12,840	 	  	 	—  	 	  	 	12,840	 	  	 	—  	 	  	 	8,562	 	  	 	42,000	 	  	 	50,562	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

  

	 	(1)	 Trade receivables exclude sales and income tax receivables. 

	 	(2)	 2015 PP&E amount valued at fair value less cost to sell, while 2016 amount of the Cusi Mine is valued at
net book value. 

 There were no transfers between level 1 and level 2 during the years ended
December 31, 2016 and 2015. 
  

	 	(d)	 Financial risk management 

The Company is exposed to financial risks, including credit risk, liquidity risk, currency risk, interest rate risk and price
risk. The aim of the Company’s overall risk management strategy is to reduce the potential adverse effect that these risks may have on the Company’s financial position and results. The Company’s Board of Directors has overall
responsibility and oversight of management’s risk management practices. Risk management is carried out under policies approved by the Board of Directors. The Company may from time to time, use foreign exchange contracts and commodity price
future and forward contracts to manage its exposure to fluctuations in foreign currency and metals prices. The Company does not ordinarily enter into hedging arrangements to cover long term commodity price risk unless it has the obligation to so
under a credit facility, which would be approved of the Board of Directors. 

  
  

37  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	21	 Financial instruments and financial risk management (continued) 

 

	 	i)	 Market Risk 

 

	 	(1)	 Currency risk 

Currency risk is the risk that the fair values or future cash flows of the Company’s financial instruments will
fluctuate because of changes in foreign exchange rates. The Company and its subsidiaries’ financial instruments are exposed to currency risk where those instruments are denominated in currencies that are not the same as their functional
currency; exchange gains and losses in these situations impact net income or loss. The Company’s sales of silver, copper, lead and zinc are denominated in United States dollars and the Company’s costs are incurred in Canadian dollars,
United States dollars, Mexican pesos and Peruvian Nuevo Soles. The United States dollar is the functional currency of the Peruvian and Mexican entities. The Canadian dollar is the functional currency of all other entities. The company also holds
cash and cash equivalents, trade and other receivables and accounts payable that are subject to currency risk. 
 The
following are the most significant areas of exposure to currency risk: 
  

																	
	 	  	December 31, 2016	 
	 	  	 	 	  	 	 	  	Peruvian	 	  	 	 
	 	  	 	 	  	Mexican	 	  	Nuevo	 	  	 	 
	 	  	CAN dollar	 	  	Peso	 	  	Soles	 	  	Total $	 
	 Cash and cash equivalents
	  	 	244	 	  	 	67	 	  	 	1,857	 	  	 	2,168	 
	 Trade and other receivables
	  	 	411	 	  	 	8,933	 	  	 	457	 	  	 	9,801	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		  	 	655	 	  	 	9,000	 	  	 	2,314	 	  	 	11,969	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Accounts payable and other liabilities
	  	 	(1,086	) 	  	 	(24,234	) 	  	 	(12,539	) 	  	 	(37,859	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total
	  	 	(432	) 	  	 	(15,234	) 	  	 	(10,225	) 	  	 	(25,891	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		
	 	  	December 31, 2015	 
	 	  	 	 	  	 	 	  	Peruvian	 	  	 	 
	 	  	 	 	  	Mexican	 	  	Nuevo	 	  	 	 
	 	  	CAN dollar	 	  	Peso	 	  	Soles	 	  	Total $	 
	 Cash and cash equivalents
	  	 	218	 	  	 	365	 	  	 	1,093	 	  	 	1,676	 
	 Trade and other receivables
	  	 	154	 	  	 	12,794	 	  	 	351	 	  	 	13,299	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		  	 	372	 	  	 	13,159	 	  	 	1,444	 	  	 	14,975	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Accounts payable and other liabilities
	  	 	(522	) 	  	 	(29,976	) 	  	 	(8,478	) 	  	 	(38,976	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total
	  	 	(151	) 	  	 	(16,817	) 	  	 	(7,034	) 	  	 	(24,001	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

  
  

38  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	21	 Financial instruments and financial risk management (continued) 

The Company manages and monitors this risk with the objective of mitigating the potential adverse effect that fluctuations in
currencies against the Canadian dollar and US dollar could have on the Company’s Consolidated Statement of Financial Position and Consolidated Statement of income (loss). As at December 31, 2016, the Company has not entered into any
derivative contracts to mitigate this risk. 
 A 10% appreciation in the US dollar exchange rate against the Peruvian Nuevo
Soles and the Mexican Peso based on the financial assets and liabilities held at December 31, 2016, with all the other variables held constant, would have resulted in an increase to the Company’s net loss of $2,500 (increase in loss in
2015 of $618). 
 A 10% appreciation in the Canadian dollar exchange rate against the US dollar based on the financial
assets and liabilities held at December 31, 2016 and 2015, with all the other variables held constant, would have resulted in a negligible impact to the Company’s net income (loss). 

 

	 	(2)	 Interest rate risk 

Interest rate risk is the risk that the fair values or future cash flows of the Company will fluctuate because of changes in
market interest rates. The Company is exposed to interest rate risk on its loans payable (note 11). The Company monitors its exposure to interest rates closely and has not entered into any derivative contracts to manage its risk. The weighted
average interest rate paid by the Company during the year ended December 31, 2016 on its loans and notes payable in Peru was 4.47% (2015 – 4.28%). With all other variables unchanged a 1% increase in the interest rate would have
increased the Company’s net loss by $635 (2015 – $598). The interest rate paid by the Company during the year ended December 31, 2016 on its loans payable in Mexico was 5.83% (2014 – 5.78%). With all other variables
unchanged a 1% increase in the interest rate would have increased the Company’s net loss by $65 (2015 – $54). 
  

	 	(3)	 Commodity price risk 

Commodity price risk is the risk that the fair value or future cash flows of a financial instrument will fluctuate because of
changes in market prices (other than those arising from interest risk or currency risk), whether those changes are caused by factors specific to the individual financial instrument or its issuer, or factors affecting all similar financial
instruments in the market. 
 As at December 31, 2016 and 2015, the Company had certain amounts related to the sales
of concentrates that have only been provisionally priced. Commodity price risk exists solely in Mexico as the Company fixes metal prices with the purchaser of its concentrates for specific sales for which concentrates have been delivered. The
Company’s exposure to commodity price risk is as follows: 
  

									
	 	  	2016	 	  	2015	 
	 Commodity
	  	$	 	  	$	 
	 10% decrease in silver prices
	  	 	(32	) 	  	 	(68	) 
	 10% decrease in copper prices
	  	 	(213	) 	  	 	(1,679	) 
	 10% decrease in lead prices
	  	 	(1	) 	  	 	(1	) 
	 10% decrease in gold prices
	  	 	(84	) 	  	 	(198	) 

 As at December 31, 2016 and 2015, the Company did not have any forward contracts
outstanding. 

  
  

39  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	21	 Financial instruments and financial risk management (continued) 

 

	 	ii)	 Liquidity risk 

Liquidity risk is the risk that the Company will not be able to meet its financial obligation as they fall due. The Company
has in place planning, budgeting and forecasting process to help determine the funds required to support the Company’s normal operating requirements on an ongoing basis and its expansion and development plans. The Company tries to ensure
that it has sufficient committed credit facilities to meet its short-term operating needs, note 11. 
 In the normal
course of business, the Company enters into contracts that give rise to commitments for future minimum payments. The following table summarizes the remaining contractual maturities and undiscounted cash flows as at December 31, 2016 of the
Company’s financial liabilities and operating and capital commitments: 
  

																					
	 	  	Within
1 year	 	  	1-2
years	 	  	2-5
years	 	  	After
5 years	 	  	Total	 
	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 
	 Accounts payable and accrued liabilities
	  	 	29,828	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	29,828	 
	 Loans payable(1)
	  	 	28,633	 	  	 	14,280	 	  	 	34,500	 	  	 	—  	 	  	 	77,413	 
	 Interest on loans payable
	  	 	745	 	  	 	274	 	  	 	250	 	  	 	—  	 	  	 	1,269	 
	 Other liabilities
	  	 	4,509	 	  	 	1,149	 	  	 	—  	 	  	 	—  	 	  	 	5,658	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total Commitments
	  	 	63,715	 	  	 	15,703	 	  	 	34,750	 	  	 	—  	 	  	 	114,168	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

  

	 	(1)	 Current portion includes $14.8 million of notes payable from Scotiabank Peru which are a revolving credit
facility 

 In the opinion of management, the working captial at December 31, 2016, together with
future cash flows from operations and available loan facilities, is sufficient to support the Company’s commitments through 2017. 
  

	 	iii)	 Credit risk 

Credit risk is the risk that the counterparty to a financial instrument might fail to discharge its obligations under the
terms of a financial contract. Credit risk is primarily associated with trade receivables; however, it also arises on cash and cash equivalents. The Company sells its concentrate to large international organizations. The Company is exposed to
significant concentration of credit risk given that all of its revenues from Peru and Mexico were from two customers at each of the locations. At December 31, 2016 the Company has not recorded an allowance against trade receivables because it
is confident that all of the balances will be collected in full when due and there have not been any issues collecting balances owed to the Company in the past. 

The Company’s policy is to keep its cash and cash equivalents only with highly rated financial institutions and to only
invest in government securities. The Company considers the risk of loss associated with cash and cash equivalents to be low. The counterparty to the financial asset is a large international financial institution with strong credit ratings and thus
the credit risk is considered to be low. 

  
  

40  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	21	 Financial instruments and financial risk management (continued) 

The Company’s maximum exposure to credit risk is as follows: 

 

									
	 	  	December 31,	 	  	December 31,	 
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Cash and cash equivalents
	  	 	42,145	 	  	 	25,102	 
	 Trade receivables
	  	 	12,840	 	  	 	8,562	 
		  	  
	  
	 	  	  
	  
	 
		  	 	54,985	 	  	 	33,664	 
		  	  
	  
	 	  	  
	  
	 

  

	22	 Capital management 

The Company’s objectives of capital management are to safeguard its ability to support the Company’s normal
operating requirements on an ongoing basis; continue the development and exploration of its mining properties and pursue strategic growth initiatives, while minimizing the cost of such capital; and to provide an adequate return to its shareholders.

 The capital of the Company consists of items included in equity attributable to owners of the Company and debt, net of
cash and cash equivalents as follows: 
  

									
	 	  	December 31,	 	  	December 31,	 
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Equity attributable to owners of the Company
	  	 	160,268	 	  	 	170,929	 
	 Loans payable
	  	 	78,682	 	  	 	76,086	 
		  	  
	  
	 	  	  
	  
	 
		  	 	238,950	 	  	 	247,015	 
	 Less: Cash and cash equivalents
	  	 	(42,145	) 	  	 	(25,102	) 
		  	  
	  
	 	  	  
	  
	 
		  	 	196,805	 	  	 	221,913	 
		  	  
	  
	 	  	  
	  
	 

 In order to facilitate the management of capital requirements, annual budgets are prepared and
updated as necessary based on various factors, many of which are beyond the Company’s control. In assessing liquidity, the Company takes into account its expected cash flows from operations, including capital asset expenditures, and its cash
and cash equivalents. The Board of Directors reviews the annual and updated budgets. 
 The Company ensures that there are
sufficient committed credit facilities to meet its short term requirements. At December 31, 2016, the Company expects its current capital resources to be sufficient to support its normal operating requirements on an ongoing basis and planned
development and explorations programs. At December 31, 2016, the Company was in compliance with the external capital requirements. 

  
  

41  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	23	 Related party transactions 

 

	 	(a)	 Related party transactions 

During the year ended December 31, 2016, the Company recorded consulting fees of $200 (2015 – $250) to companies
related by common directors or officers. At December 31, 2016, accounts payable and accrued liabilities include $Nil (2015 – $Nil) with these related parties. Related party transactions occurred in the normal course of business. As at
December 31, 2016, the Company has accounts receivable outstanding from these related parties of $284 (2015 – $200). 
  

	 	(b)	 Compensation of directors and key management personnel 

The remuneration of the Company’s directors, officers and other key management personnel during the years ended
December 31, 2016 and 2015 are as follows: 
  

									
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Salaries and other short term employment benefits
	  	 	3,847	 	  	 	3,346	 
	 Share-based payments
	  	 	897	 	  	 	1,404	 
		  	  
	  
	 	  	  
	  
	 
	 Total compensation
	  	 	4,744	 	  	 	4,750	 
		  	  
	  
	 	  	  
	  
	 

  

	24	 Supplemental cash flow information 

Changes in working capital 
  

									
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Trade and other receivables
	  	 	(3,134	) 	  	 	14,383	 
	 Financial and other assets
	  	 	209	 	  	 	32	 
	 Income tax receivable
	  	 	1,050	 	  	 	(5,060	) 
	 Inventories
	  	 	(4,874	) 	  	 	5,055	 
	 Accounts payable and accrued liabilities
	  	 	4,164	 	  	 	(116	) 
	 Income taxes payable
	  	 	(115	) 	  	 	758	 
	 Other liabilities
	  	 	1,177	 	  	 	(4,635	) 
		  	  
	  
	 	  	  
	  
	 
		  	 	(1,523	) 	  	 	10,417	 
		  	  
	  
	 	  	  
	  
	 

  
  

42  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	25	 Contingencies 

The Company and its subsidiaries have been named as defendants in certain actions incurred in the normal course of business.
In all cases the Company and its subsidiaries will continue to vigorously defend the actions and an accrual has been made in the consolidated financial statements for matters that are probable and can be reliably estimated. 

The contingencies outstanding associated with our Mexican subsidiaries are as follows: 

 

	 	a)	 In October 2009, Polo y Ron Minerals, S.A. de C.V. (“P&R”) sued the Company and one of its
subsidiaries, Dia Bras Mexicana S.A. de C.V. P&R claimed damages for the cancelation of an option agreement (the “Option Agreement”) regarding the San Jose properties in Chihuahua, Mexico (the “San Jose Properties”). The
Company believes that it has complied with all of its obligations pertaining to the Option Agreement. In October 2011, the 8th Civil Court of the Judicial District of Morelos in Chihuahua issued a resolution that absolved the Company from the claims
brought against it by P&R on the basis that P&R did not provide evidence to support any of its claims. P&R appealed this resolution to the State Court, which overruled the previous resolution and ordered the Company to: (i) transfer
to P&R 17 mining concessions from the Company’s Bolivar project, including the mining concessions where both mine operations and mineral reserves estimates are located; and (ii) pay $422,674 to P&R. In February 2013, a Federal
Court in the State of Chihuahua granted the Company a temporary suspension of the adverse resolution issued by the State Court of Chihuahua, Mexico. On February 12, 2016 The Second Federal Collegiate Court of Civil and Labor Matters, of the
Seventeenth circuit in the State of Chihuahua, (“the Federal Court”) issued a new judgment ruling that the State Court lacked jurisdiction to rule on issues concerning mining titles, and that no previous rulings by the State Court against
the Company shall stand. They ordered the cancellation of the previous adverse resolution by the state Court. The Company will continue to vigorously defend this claim. Sierra Metals continues to believe that the original claim is without
merit.

  

	 	b)	 In 2009, a personal action was filed in Mexico against DBM by an individual, Ambrosio Bencomo
Muñoz as administrator of the intestate succession of Ambrosio Bencomo Casavantes y Jesus Jose Bencomo Muñoz, claiming the annulment and revocation of the purchase agreement of two mining concessions, Bolívar III and IV between
Minera Senda de Plata S.A. de C.V. and Ambrosio Bencomo Casavantes, and with this, the nullity of purchase agreement between DBM and Minera Senda de Plata S.A. de C.V. In June 2011, the Sixth Civil Court of Chihuahua, Mexico, ruled that the claim
was unfounded and dismissed the case, the plaintiff appealed to the State Court. The process is in the appealing court. The Company will continue to vigorously defend this action and is confident that the claim is of no merit. 

 

	26	 Subsequent Events 

Sierra Metals Inc. shareholders have voted at a special meeting of shareholders on February 16, 2017, to spin-out (the
“Spin-out”) to existing shareholders its 100% owned Las Lomas Project, into a new public entity called Cautivo Mining Inc. (“Cautivo”) by approving a reduction in the capital of the common shares of Sierra Metals for the capital
assigned to Cautivo Mining. The final voting results were 99.94% voting in favour of the capital reduction. On the completion of the Spin-out, Cautivo who are the developer of the properties’ main asset will be its indirect interest in the Las
Lomas Project (the “Las Lomas Project”). An estimate of the financial effect of the Spin-out cannot be made at this time. 

  
  

43  |  Page 

 Sierra Metals Inc. 

Notes to the Consolidated Financial Statements 

For the years ended December 31, 2016 and 2015 

(In thousands of United States dollars, unless otherwise stated) 

 
  

	26	 Subsequent Events (continued) 

On March 29, 2017 the Company announced that Mark Brennan has tendered his resignation as President, Chief Executive
Officer. Mr. Brennan will continue in his current role for a period of 30 days to facilitate the implementation of an orderly succession plan. 

  
  

44  |  PageEX-4.3

 Exhibit 4.3 
  

 
 SIERRA METALS INC. 

MANAGEMENT’S DISCUSSION AND ANALYSIS 

FOR THE YEAR ENDED DECEMBER 31, 2016 
  

 

			
	 Corporate Office
	  	 TSX: SMT

	 Suite 2100, 79 Wellington St W.
	  	 BVL: SMT

	 Toronto, ON, Canada M5K 1H1
	  	  
 www.sierrametals.com

 TABLE OF CONTENTS 
  

							
			
	 1.
	 	INTRODUCTION	  	 	3	 
			
	 2.
	 	COMPANY OVERVIEW	  	 	3	 
			
	 3.
	 	2016 OPERATING AND FINANCIAL HIGHLIGHTS	  	 	4	 
			
	 4.
	 	OUTLOOK	  	 	12	 
			
	 5.
	 	RESULTS OF OPERATIONS	  	 	19	 
			
	 6.
	 	SUMMARIZED FINANCIAL RESULTS	  	 	31	 
			
	 7.
	 	QUARTERLY FINANCIAL REVIEW	  	 	36	 
			
	 8.
	 	LIQUIDITY AND CAPITAL RESOURCES	  	 	39	 
			
	 9.
	 	SAFETY, HEALTH AND ENVIRONMENT	  	 	41	 
			
	 10.
	 	FINANCIAL INSTRUMENTS AND RELATED RISKS	  	 	41	 
			
	 11.
	 	OTHER RISKS AND UNCERTAINTIES	  	 	45	 
			
	 12.
	 	NON-IFRS PERFORMANCE MEASURES	  	 	50	 
			
	 13.
	 	RELATED PARTY TRANSACTIONS	  	 	55	 
			
	 14.
	 	CRITICAL ACCOUNTING POLICIES AND ESTIMATES	  	 	56	 
			
	 15.
	 	OFF BALANCE SHEET ARRANGEMENTS	  	 	59	 
			
	 16.
	 	DISCLOSURE CONTROLS AND INTERNAL CONTROLS OVER FINANCIAL REPORTING (“ICFR”)	  	 	59	 
			
	 17.
	 	CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS	  	 	60	 

	1.	 INTRODUCTION 

This Management’s Discussion and Analysis (“MD&A”) should be read in conjunction with Sierra Metals Inc.’s (the
“Company” or “Sierra” or “Sierra Metals”) consolidated financial statements for the year ended December 31, 2016 and related notes thereto (the “Financial Statements”), which have been prepared in
accordance with International Financial Reporting Standards (“IFRS”), as issued by the International Accounting Standards Board (“IASB”). References herein to “$” are to the United States dollar and “C$” are
to the Canadian dollar and all tabular amounts are expressed in thousands of $ unless otherwise stated. All information contained in this MD&A is current as of March 28, 2017 unless otherwise noted. The Company’s common shares (the
“Common Shares”) are listed and traded on the Toronto Stock Exchange (the “TSX”) and the Peruvian Bolsa de Valores de Lima (“BVL” or the “Lima Stock Exchange”) under the symbol “SMT”. Additional
information relating to the Company, including the Company’s Annual Information Form (“AIF”), is available on SEDAR at www.sedar.com and on the Company’s website at www.sierrametals.com. A cautionary note regarding
forward-looking information follows this MD&A. 
 QUALIFIED PERSON 

Gordon Babcock B.Sc., P. ENG., Chief Operating Officer, Sierra Metals, is the qualified person as defined in National Instrument 43-101 (“NI 43-101”) relating to operational scientific and technical information of Sierra Metals which have been included in this MD&A. 

Enrique Gomez de la Rosa B.Sc., Geological Engineering, and Gordon Babcock B.Sc., P. ENG., Chief Operating Officer, Sierra Metals are the
qualified people as defined in NI 43-101, who supervised the preparation of the information related to mineral exploration for Sierra Metals’ Mexican properties included in this MD&A. 

 

	2.	 COMPANY OVERVIEW 

Sierra Metals is a Canadian and Peruvian listed mining company focused on the production, exploration and development of precious and base
metals in Peru and Mexico. The Company plans to continue growing its production base through brownfield exploration investments within its properties. The Company’s key priorities are to provide high returns on invested capital, to generate
strong cash flows and to maximize shareholder value. The Company has three producing mining properties and manages its business on the basis of the geographical location of its mining projects. The Peruvian Operation (“Peru”) is comprised
of the Yauricocha mine (“Yauricocha” or the “Yauricocha Mine”), located in the province of Yauyos, its near-mine concessions, and exploration and early stage properties. The Mexican Operation (“Mexico”) includes the
Bolivar (“Bolivar’ or the “Bolivar Mine”) and Cusi (“Cusi” or the “Cusi Mine”) mines, both located in Chihuahua State, Mexico, their near-mine concessions, and exploration and early stage properties. The
Company’s strategic focus is currently on its operations, improving efficiencies, as well as pursuing growth opportunities at, and surrounding, its operating projects. The Company is also considering other opportunities to add value and expand
through external growth. Further success in brownfields exploration such as the recent discovery of the Esperanza Zone at the Yauricocha Mine, combined with the Company’s production optimization program will enable Sierra Metals to continue on
a solid path of increased production and resource growth for the foreseeable future. 

  
 3 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	3.	 2016 OPERATING AND FINANCIAL HIGHLIGHTS 

 

																	
	 	  	Three Months Ended	 	 	Year Ended	 
	 (In thousands of dollars, except per share and cash cost amounts,
consolidated figures unless
noted otherwise)
	  	December 31,
2016	 	 	December 31,
2015	 	 	December 31,
2016	 	 	December 31,
2015	 
	 Operating
	  				 				 				 			
	 Ore Processed / Tonnes Milled
	  	 	517,705	 	 	 	456,842	 	 	 	2,034,465	 	 	 	1,864,706	 
	 Silver Ounces Produced (000’s)
	  	 	789	 	 	 	603	 	 	 	2,979	 	 	 	3,105	 
	 Copper Pounds Produced (000’s)
	  	 	6,153	 	 	 	5,493	 	 	 	23,390	 	 	 	23,197	 
	 Lead Pounds Produced (000’s)
	  	 	9,990	 	 	 	7,920	 	 	 	40,551	 	 	 	42,177	 
	 Zinc Pounds Produced (000’s)
	  	 	17,039	 	 	 	9,265	 	 	 	56,610	 	 	 	42,077	 
	 Gold Ounces Produced
	  	 	1,867	 	 	 	2,201	 	 	 	8,604	 	 	 	9,066	 
	 Copper Equivalent Pounds Produced
(000’s)1
	  	 	21,233	 	 	 	16,250	 	 	 	79,463	 	 	 	76,051	 
	 Silver Equivalent Ounces Produced
(000’s)1
	  	 	3,194	 	 	 	2,444	 	 	 	11,952	 	 	 	11,439	 
	 Cash Cost per Tonne Processed
	  	$	40.05	 	 	$	41.30	 	 	$	40.47	 	 	$	40.14	 
	 Cash Cost per AgEqOz2
	  	$	7.89	 	 	$	10.01	 	 	$	7.95	 	 	$	7.76	 
	 AISC per AgEqOz2
	  	$	14.91	 	 	$	17.22	 	 	$	14.25	 	 	$	15.07	 
	 Cash Cost per CuEqLb2
	  	$	1.16	 	 	$	1.51	 	 	$	1.20	 	 	$	1.17	 
	 AISC per CuEqLb2
	  	$	2.20	 	 	$	2.59	 	 	$	2.14	 	 	$	2.27	 
	 Cash Cost per AgEqOz (Yauricocha)2
	  	$	7.29	 	 	$	9.89	 	 	$	7.77	 	 	$	7.10	 
	 AISC per AgEqOz (Yauricocha)2
	  	$	12.51	 	 	$	17.15	 	 	$	13.11	 	 	$	13.25	 
	 Cash Cost per CuEqLb (Bolivar)2
	  	$	1.05	 	 	$	1.43	 	 	$	1.15	 	 	$	1.33	 
	 AISC per CuEqLb (Bolivar)2
	  	$	2.71	 	 	$	2.37	 	 	$	2.28	 	 	$	2.29	 
	 Cash Cost per AgEqOz (Cusi)2
	  	$	21.80	 	 	$	12.02	 	 	$	10.28	 	 	$	8.82	 
	 AISC per AgEqOz (Cusi)2
	  	$	41.32	 	 	$	21.84	 	 	$	20.41	 	 	$	26.47	 
	 Financial
	  				 				 				 			
	 Revenues
	  	$	41,825	 	 	$	25,024	 	 	$	143,180	 	 	$	134,052	 
	 Adjusted EBITDA2
	  	$	15,985	 	 	$	(1,935	) 	 	$	41,887	 	 	$	32,317	 
	 Operating cash flows before movements in working capital
	  	$	16,197	 	 	$	(2,513	) 	 	$	44,303	 	 	$	32,475	 
	 Adjusted net income (loss) attributable to shareholders2
	  	$	3,516	 	 	$	(3,599	) 	 	$	7,006	 	 	$	4,108	 
	 Net income (loss) attributable to shareholders
	  	$	(5,076	) 	 	$	(27,083	) 	 	$	(12,265	) 	 	$	(33,302	) 
	 Cash and cash equivalents
	  	$	42,145	 	 	$	25,102	 	 	$	42,145	 	 	$	25,102	 
	 Working capital
	  	$	9,576	 	 	$	13,581	 	 	$	9,576	 	 	$	13,581	 

 (1) Silver equivalent ounces and copper equivalent pounds were calculated using the following metal prices:
$14.96/oz Ag, $2.25/lb Cu, $0.75/lb Pb, $0.73/lb Zn, $1,113/oz Au. Budgeted Cu price used in equivalent ounce/pound calculations is higher than the Company’s realized selling prices during 2016, and thus, has caused CuEqb cost metrics to be
higher than those actually realized. 
 (2) This is a non-IFRS performance measure, see Non-IFRS Performance Measures section of the
MD&A. 
 2016 Operational Highlights and Growth Initiatives 

In 2016 consolidated metal production increased by 4% compared to 2015 which represented the second highest level of annual metal production
in the Company’s history. During Q4 2016, consolidated metal production increased 31% compared to Q4 2015, and resulted in the achievement of the second highest level of quarterly metals production in the Company’s history. The increase in
metal production compared to Q4 2015 was due to higher throughput, head grades and recoveries at the Yauricocha Mine in Peru. This was partially offset by a decrease in head grades and recoveries at the Bolivar Mine, and the decrease in throughput,
head grades and recoveries at the Cusi Mine. 
 The Company ended 2016 with solid production performance despite a planned shutdown in
November for the installation of a higher capacity hoist at the Yauricocha Mine which will significantly increase capacity moving forward. In addition, Sierra also continues to see a substantial positive impact from the operational improvement
programs implemented at the Yauricocha Mine which continued to contribute strongly to operational results during the second half of 2016. 

Plant improvements completed at the Bolivar Mine during the second half of 2016 included the installation of a new screening plant and
cyclones which resulted in improved recoveries. At the Cusi Mine, the installation of a screening plant, a zinc circuit, and an improved cyclone rack, resulted in recovery and grade improvements in the lead and zinc circuits. 

  
 4 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 2016 Consolidated Production Highlights 

 

	 	•	 	 Silver (“Ag”) equivalent production of 11.9 million ounces (“oz”); a 4% increase from
2015; second highest in Company history; 

  

	 	•	 	 Copper (“Cu”) equivalent production of 79.5 million pounds (“lb”); a 4% increase from
2015; second highest in Company history; 

  

	 	•	 	 Total of 2 million tonnes processed; a 9% increase from 2015 production; and the highest throughput in
Company history; 

  

	 	•	 	 Completion of restructuring and implementation of operational improvements program at Yauricocha; and

  

	 	•	 	 2016 Guidance Achieved. 

Q4 2016 Production Highlights 
  

	 	•	 	 Silver equivalent production of 3.2 million ounces; a 31% increase from Q4 2015; 

 

	 	•	 	 Copper equivalent production of 21.2 million pounds; a 31% increase from Q4 2015; 

 

	 	•	 	 Total of 517,705 tonnes processed; a 13% increase from Q4 2015 production; 

 

	 	•	 	 Second highest quarterly throughput at both the Yauricocha and Bolivar Mines; and 

 

	 	•	 	 Commissioning of the new Mascota hoist at Yauricocha. 

2016 Financial Highlights 
  

	 	•	 	 Revenue from metals payable of $143.2 million in 2016 increased by 7% from $134.1 million in 2015. Higher
revenues are primarily attributable to the 8% increase in throughput and increase in copper head grades at Yauricocha; the increase in throughput and gold recoveries at Bolivar; the introduction of a zinc concentrate and higher gold and lead grades
and recoveries from Cusi; and the increase in the prices of silver (9%), lead (2%), zinc (10%), and gold (9%) in 2016 compared to 2015; this was partially offset by an 11% decrease in the price of copper, and lower head grades of all metals at
Bolivar; 

  

	 	•	 	 Yauricocha’s cash cost per silver equivalent payable ounce was $7.77 (2015 - $7.10) and all-in sustaining
cash cost (“AISC”) per silver equivalent payable ounce was $13.11 (2015 - $13.25) for the year ended December 31, 2016 compared to the same period in 2015. The decrease in the annual AISC per silver equivalent payable ounce during
2016 was due to an increase in silver equivalent payable ounces as a result of higher throughput and ore feed head grades from the increase in available production from higher grade zones in the Mine. Also, lower treatment and refining costs
incurred during 2016 resulting from improved terms within re-negotiated sales contracts with our off-takers offset some 

  
 5 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	 	 
of the additional sustaining capital costs and costs related to the mechanization and water management controls implemented at the Mine during 2016; 

 

	 	•	 	 Bolivar’s cash cost per copper equivalent payable pound was $1.15 (2015 - $1.33) and AISC per copper
equivalent payable pound was $2.28 (2015 - $2.29) for the year ended December 31, 2016 compared to the same period in 2015. The annual AISC per copper equivalent payable pound remained consistent during 2016 the decrease in cash costs offset an
increase of $2.2M in sustaining capital expenditures related to mine development and equipment purchases; as well as a decrease in copper equivalent pounds sold which was due to the lower head grades and recoveries of all metals, except gold
recoveries; 

  

	 	•	 	 Cusi’s cash cost per silver equivalent payable ounce was $10.28 (2015 - $8.82) and AISC per silver
equivalent payable ounce was $20.41 (2015 - $26.47) for the year ended December 31, 2016 compared to the same period in 2015. Annual AISC per silver equivalent payable ounce decreased due to the significant decrease of $8.5M in sustaining
capital expenditures related to stope and drift development within the mine during 2016 as a significant amount of mine development work was completed during the last two years which has resulted in reduced sustaining capital costs required to drift
and develop the necessary amount of mining faces required to maintain current production levels. The decline in throughput and silver head grades and recoveries resulted in fewer silver equivalent payable ounces which also contributed to the higher
annual cash cost per silver equivalent payable ounce in 2016 compared to 2015; 

  

	 	•	 	 Adjusted EBITDA (1) of $41.9 million for the year
ended December 31, 2016 increased compared to $32.3 million in 2015. The increase in adjusted EBITDA in 2016 was primarily due to the $7.4 million increase in revenue at Yauricocha, discussed previously; 

 

	 	•	 	 Net income (loss) attributable to shareholders for the year ended December 31, 2016 was $(12.3) million
(2015: $(33.3) million) or $(0.08) per share (basic and diluted) (2015: $(0.21)). The 2015 net loss of $33.3 million included a $19.0 million impairment loss allocated against capitalized exploration and evaluation expenditures on the Cusi Mine;

  

	 	•	 	 Adjusted net income attributable to shareholders
(1) of $7.0 million, or $0.04 per share, for the year ended December 31, 2016 increased compared to adjusted net income of $4.1 million, or $0.03 per share for 2015;

  

	 	•	 	 A large component of the net income (loss) for every period is the non-cash depletion charge in Peru, which
was $24.4 million for the year ended December 31, 2016 (2015: $27.6 million). The non-cash depletion charge is based on the aggregate fair value of the Yauricocha mineral property at the date of acquisition of Corona of $371.0 million amortized
over the total proven and probable reserves of the mine. The Company has been successful in reducing the depletion expense year over year as a result of the increase in the mineral reserves at Yauricocha based on previous NI 43-101 reports filed;

  

	 	•	 	 Cash flow generated from operations before movements in working capital of $44.3 million for the year ended
December 31, 2016 compared to $32.5 million in 2015. The increase in operating cash flow is mainly the result of higher revenues generated and higher gross margins incurred; and 

  
 6 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	 	•	 	 Cash and cash equivalents of $42.1 million and working capital of $9.6 million as at December 31, 2016
compared to $25.1 million and $13.6 million, respectively, at the end of 2015. Cash and cash equivalents have increased by $17.0 million during the year ended December 31, 2016 due to $43.6 million of operating cash flows, and proceeds from the
issuance of credit facilities of $12.8 million; partially offset by capital expenditures incurred in Mexico and Peru of $(25.4) million, repayment of loans, credit facilities and interest of $(13.2) million, and dividends paid to non-controlling
interest shareholders of $(0.5) million. Included in the $43.6 million of operating cash flows were negative changes in non-cash working capital items of $1.5 million due to the increase accounts receivable and inventory as at December 31,
2016. 

 (1) This is a non-IFRS performance measure, see non-IFRS
Performance Measures section of this MD&A. 
 Project Development 
  

	 	•	 	 The Company announced the results of its continuing drill program at Esperanza which reveal that the zone is
open on strike to the North, and at depth, and comes as part of an ongoing drill program at this high priority target at the Yauricocha Mine; 

  

	 	•	 	 Provided an updated Mineral Reserve and Resource update at the Company’s Yauricocha Mine which includes
the Esperanza zone (press release dated August 11, 2016); and an NI 43-101 compliant Technical Report was filed on SEDAR on September 12, 2016 which was prepared by SRK Consulting; 

 

	 	•	 	 Recent exploration development and test stope programs from the Esperanza zone have provided 54,000 tonnes of
material in 2016 which was processed at the Chumpe plant, located in the Lima District, Peru. The Company expects to process approximately 200,000 tonnes from the Esperanza zone during 2017; 

 

	 	•	 	 The Company successfully transitioned from the previously operating surface hoist to a new Hepburn double drum
1100 HP production hoist currently installed on the 720 level, where it will service the Mascota Shaft and increase skipping capacity by 30,000 MT per month; 

 

	 	•	 	 Work is progressing on a new NI 43-101 Technical Reports for the Bolivar and Cusi Mines, which are being
prepared by SRK Consulting; These reports are expected to be completed by April 2017; 

  

	 	•	 	 Mine development at Bolívar during Q4 2016 totaled 1,112 m. Most of these meters (746) were
developed to prepare stopes for mine production. The remainder of the meters (366) were related to the deepening of ramps and developing service ramps to be used for ventilation and pumping; and 

 

	 	•	 	 During Q4 2016, at the Cusi property, mine development totaled 1,304 meters, and 4,750 meters of infill
drilling was carried out inside the Mine. 

  
 7 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Recent Developments 
  

	 	•	 	 On March 29, 2017 the Company announced that Mark Brennan has tendered his resignation as President,
Chief Executive Officer. Mr. Brennan will continue in his current role for a period of 30 days to facilitate the implementation of an orderly succession plan. 

Exploration Highlights 
 Peru: 

During Q4 2016, the Company drilled 42 holes totaling 7,284 meters at Yauricocha. The drilling included the following: 

Exploration Drilling: 

	 	•	 	 Esperanza: 3 horizontal holes totaling 521 meters to explore the continuity of mineralization directly south
of the orebody; and 2 additional holes totaling 1,352 meters to explore the northern part of the orebody towards Cachi Cachi; 

	 	•	 	 Mascota-Cuye: 4 holes totaling 1,144 meters from the 1070 level to test the continuity of the oxide
mineralization at depth and explore new areas between the Mascota and Cuye orebodies); 

	 	•	 	 Mina Cachi Cachi (Escondida Level 870): 4 holes totaling 614 meters to explore new mineralized zones;

 Definition Drilling: 

	 	•	 	 Rosaura (Level 920): 12 holes totaling 1,641 meters to define floors 16 and 8 on level 920 of the Rosaura
orebody; 

	 	•	 	 Esperanza (920 level): 12 horizontal holes with a length of 1,331 meters of definition drilling to provide a
greater level of assurance to the estimated resources within the orebody; 

	 	•	 	 Cuerpos Pequenos (silver, lead and zinc) 1 (970 level): 5 holes totaling 680 meters of definition drilling to
verify whether the orebody reached the 1020 and 1070 levels. 

 Discovery of New High Grade Sulphide Cuye-Mascota Zone 

On November 17, 2016 the Company announced the discovery of a new high grade sulfide zone referred to as the “Cuye - Mascota”
zone, located 200 meters north of the central mine area along strike and adjacent to current mining activities. The discovery comes as part of ongoing diamond drill brownfield exploration programs testing priority targets at its Yauricocha Mine
located 150 kilometers southeast of Lima in the Yauricocha Mining District (Cordillera Occidental), Peru. A total of seven drill holes have been drilled to date on the Cuye - Mascota orebody, which is located at the extreme south end of the Mascota
oxide orebody. The Company continues with exploration drilling activities in areas below the Cuye and Mascota ore bodies and will continue to report assay results as they become available. 

  
 8 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Drill hole highlights include: (for a complete table of drill results please
see Company press release dated November 17, 2016) 
  

	 	•	 	 Hole MAS-09: 4.90% Cu, 0.89% Zn, 0.37% Pb, 0.23 gpt Au, 226.45 gpt Ag over 18.2m 

	 	•	 	 Hole MAS-17: 0.46% Cu, 17.71% Zn, 4.13% Pb, 0.94 gpt Au, 125.16 gpt Ag over 30.10m 

	 	•	 	 Hole MAS-23: 0.73% Cu, 28.85% Zn, 1.45% Pb, 0.35 gpt Au, 149.00 gpt Ag over 7.55m 

	 	•	 	 Hole MAS-23: 2.72% Cu, 0.43% Zn, 0.09% Pb, 2.12 gpt Au, 102.95 gpt Ag over 20.00m 

	 	•	 	 Hole MAS-27: 0.39% Cu, 12.59% Zn, 3.46% Pb, 0.68 gpt Au, 91.91 gpt Ag over 9.60m 

	 	•	 	 Hole MAS-27: 1.32% Cu, 0.53% Zn, 0.05% Pb, 0.87 gpt Au, 45.67 gpt Ag over 8.80m 

As a result of this drilling program, continued mineralization has been identified in the Cuye - Mascota zone, as well as other important
structures such as the extension of the existing Mascota zone. This has provided the Company with important information that had been previously unknown. This new information will be reported in the next resource review conducted by the Company,
expected to be released during Q2 2017. 
 The Cuye - Mascota orebody had been previously mined up to and including the 870 level horizon.
The orebody was predominantly a copper sulfide deposit which was reduced to many small structures below the 870 level. Exploration carried out during 2011 and 2012 was unsuccessful between the 870 and 1020 level horizon, which was the lowest level
that could be drilled at that time. Due to the results of the current development program on the 1070 level, geologists have confirmed that the Cuye - Mascota orebody continues at depth to below the 1270 level, and includes a drill intercept at the
1420 level. Geologists have also identified the transition zone of oxides to fresh lead, zinc and silver sulfide mineralization in this drilling program. 

The significance of these results is that the drilling has identified a new zone, 200 meters long, which is still open in several directions
and are high-grade wide structures. The historic Cuye copper orebody used to be one of the main cashflow generators 10 years ago at Yauricocha. This discovery seems to have found its extension at depth with similar widths and grades as the historic
Cuye Orebody located at higher levels which was thought to have been depleted. The discovery of the transition zone from oxides to sulfides at the Mascota orebody is very important because of the higher recovery rates associated with processing
sulfide versus oxide ores. Mascota has been one of our most important cashflow contributors in recent years despite its lower metal recovery resulting from being an oxide orebody. 

Mexico: 
 Bolivar 

 

	 	•	 	 During 2016, exploration drilling continued along the Bolivar West fault area and the Company drilled a total
of 11,749 meters in this area; while 3,473 meters were drilled in the El Gallo Inferior area. 

 Definition of High Grade Silver-Gold
Mineralization at the La Sidra Zone and High Grade Copper at the Bolivar West Zone 
 On March 6, 2017 the Company announced the
results of the initial drill program on the Bolivar property in Chihuahua State, Mexico and continues to define high grade silver-gold and 

  
 9 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
polymetallic mineralization within the La Sidra vein. The mineralized zone currently extends to over 500 meters in length and to 300 meters in depth and is still open along strike and down dip.

 Drilling programs also continue at Bolivar West with future plans to drill Bolivar North West (skarn ore deposit area) to define high
grade copper with coincident strong chargeability and within resistivity zones detected during a recently completed a 400 Hectare Titan 24 Induced Polarization (‘IP’) survey conducted by Quantec Geosciences of Toronto, Ontario. 

A planned 20,000-metre drilling program has been budgeted with 9,500 meters of In-fill drilling planned at La Sidra and 11,500 meters at
Bolivar West and Bolivar NorthWest. Currently drilling is being conducted on Bolivar West zone. The purpose of these programs is to define existing known areas. Once final results are available from the geophysical program, further drilling programs
will be carried out. 
 La Sidra Zone Drill hole highlights include: (for a complete table of drill results please see
Company press release dated March 6, 2016) 
  

																									
	Hole No.	  	True
Width
(m)	 	  	CuEQ
(%)	 	  	Ag
(g/t)	 	  	Pb
(%)	 	  	Zn
(%)	 	  	Au
(g/t)	 
	 DB14B460:
	  	 	3.5	 	  	 	9.22	 	  	 	717	 	  	 	0.39	 	  	 	1.31	 	  	 	0.76	 
	 DB14B462:
	  	 	9.7	 	  	 	10.63	 	  	 	390	 	  	 	1.88	 	  	 	4.99	 	  	 	4.05	 
	 DB15B490:
	  	 	1.7	 	  	 	10.60	 	  	 	537	 	  	 	1.17	 	  	 	1.66	 	  	 	3.92	 

 Bolivar West Zone Drill hole highlights include: 

 

																									
	Hole No.	  	True
Width
(m)	 	  	CuEQ
(%)	 	  	Ag
(g/t)	 	  	Cu
(%)	 	  	Zn
(%)	 	  	Au
(g/t)	 
	 DB15B516:
	  	 	9.2	 	  	 	4.05	 	  	 	69	 	  	 	2.34	 	  	 	2.02	 	  	 	0.07	 
	 DB16B526:
	  	 	15.6	 	  	 	2.46	 	  	 	41	 	  	 	1.39	 	  	 	0.77	 	  	 	0.33	 
	 DB16B538:
	  	 	19.0	 	  	 	2.00	 	  	 	32	 	  	 	1.66	 	  	 	0.02	 	  	 	0.00	 
	 DB16B549:
	  	 	10.5	 	  	 	4.26	 	  	 	60	 	  	 	2.70	 	  	 	0.02	 	  	 	1.17	 

 Cusi: 
  

	 	•	 	 The Company is continuing the exploration program on the Santa Rosa de Lima area as well as performing some
definition drilling within the mine. 

 Discovery of Significant High-Grade Zone at Cusi Silver Mine in Mexico 

On February 27, 2017 the Company announced the discovery of new high grade silver intercepts occurring in the Santa Rosa de Lima complex
located within the current Cusi Mine operational area. The Santa Rosa de Lima complex lies within a regional structure extending some 64 kilometers. Extension on the Cusi property has an anticipated length of 12 kilometers. The discovery comes as
part of a reinterpretation of the Hydrothermal model and a drilling campaign consisting of 15,000 meters which began in December 2016. To date, the Company has drilled 10,200 meters or about 79% of the planned program which is expected to be
completed by the end of March 2017. 

  
 10 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The mineralization at the Santa Rosa de Lima structure is located 100 meters below the
surface, and can occasionally be observed at surface at the intersections of veins like “Promontorio” and “Santa Edwiges”. 

Historical Drill hole highlights include: 
  

																									
	Hole No.	  	True
Width
(m)	 	  	EQAg
(g/t)	 	  	Ag
(g/t)	 	  	Pb
(%)	 	  	Zn
(%)	 	  	Au
(g/t)	 
	 Cusi-628:
	  	 	20.0	 	  	 	287	 	  	 	266	 	  	 	0.22	 	  	 	0.21	 	  	 	0.06	 
	 Cusi-509
	  	 	12.0	 	  	 	794	 	  	 	758	 	  	 	0.36	 	  	 	0.33	 	  	 	0.13	 
	 Cusi-551
	  	 	6.0	 	  	 	374	 	  	 	358	 	  	 	0.26	 	  	 	0.16	 	  	 	0.00	 
	 Cusi-575
	  	 	5.0	 	  	 	860	 	  	 	709	 	  	 	2.12	 	  	 	1.31	 	  	 	0.03	 

 Current Drill hole highlights include: 

 

																									
	Hole No.	  	True
Width
(m)	 	  	EQAg
(g/t)	 	  	Ag
(g/t)	 	  	Pb
(%)	 	  	Zn
(%)	 	  	Au
(g/t)	 
	 Cusi-2
	  	 	3.2	 	  	 	351	 	  	 	332	 	  	 	0.20	 	  	 	0.18	 	  	 	0.06	 
	 Cusi-4
	  	 	3.9	 	  	 	298	 	  	 	167	 	  	 	2.25	 	  	 	1.25	 	  	 	0.00	 
	 Cusi-5
	  	 	2.5	 	  	 	218	 	  	 	200	 	  	 	0.12	 	  	 	0.14	 	  	 	0.12	 
	 Cusi-6
	  	 	1.5	 	  	 	1243	 	  	 	1152	 	  	 	0.26	 	  	 	0.52	 	  	 	0.85	 
	 Cusi-14
	  	 	3.1	 	  	 	1126	 	  	 	1034	 	  	 	1.50	 	  	 	2.00	 	  	 	0.00	 

 A program of 15,000 meters of drilling is currently in execution. This program is targeted to investigate an
area of one kilometer in length and 500 meters in depth in the target area defined by the previous drill holes. Drilling to date demonstrates that mineralization is consistent across the assessed area and lies between 1,850 and 1,500 meters above
sea level (150 to 550 meters below surface) in depth. To date there are four drills operating in the area to complete the program. 

Drilling will continue along the Santa Rosa de Lima Zone to the NW and SE in subsequent programs as the possibility exists to define a 12
kilometer zone. 
 The discovery and evaluation to date of the Santa Rosa de Lima zone demonstrates very important potential in our
operations at the Cusi Mine. We hope in the short term to have a better understanding of the 12 kilometer structural extension containing the Santa Rosa de Lima zone. Intercepts such as those returned in Cusi-6, Cusi-14 and Cusi-509 are common in
epithermal deposits of “bonanza” (High grade). 

  
 11 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	4.	 OUTLOOK 

The Company is focused on improving operating performance through the production of higher value ore, strengthening its asset base, increasing
its mineral reserves and resources at each of its’ mines, and exploring organic and external growth opportunities to enhance and deliver shareholder value. Sierra is pursuing several initiatives for 2017 in order to meet our objectives of
maintaining production costs in the long-term and increasing ore production values and plant capacity where possible in all operations. Sierra’s restructuring and operational improvement program, which began in Q3 2015 at the Yauricocha Mine,
has successfully addressed the management of water control issues, the improvement of mine sequencing, implementation of best practices and the mechanization of the Mine. The water flow issues are now under control with a drainage program in place
and successfully operating. The Company is effectively moving away from conventional jackleg mining to mechanized jumbo mining. Also, planned shotcrete placement is now at 50% of target and the Company is successfully moving to shotcrete, bolting
with friction bolts and resin rebar bolts, screens and straps for improved ground support. Steel set installations have also been reduced by over 50% on a monthly basis. 

The Company’s emphasis at Yauricocha will continue to be on the production of higher value ore, including an estimated 200,000 tonnes of
ore feed from the Esperanza Zone during 2017. This effort is expected to continue to improve the Company’s operating margins and cash flow generation within a recently improved, but historically softer metals price environment. 

In Q1 2016 the Company announced the discovery of a new high grade sulfide zone, referred to as the “Esperanza” zone, located
400 m north of the Yauricocha central mine area, along strike from current mining activities. The Esperanza zone has returned the thickest sulfide intercepts in the 68 year mining history at Yauricocha. The Company is currently mining the upper
portion of the Esperanza Zone at Yauricocha this zone is expected to continue to contribute 15,000 - 20,000 tonnes of ore per month to the processing plant during 2017. 

During the month of November 2016, Sierra Metals successfully transitioned from the previously operating surface hoist to a new Hepburn
104 x 45 double drum 1100 HP production hoist currently installed on the 720 level, where it will service the Mascota Shaft. This new hoist has an installed capacity of 106,000 metric tonnes (“MT”) per month based on Hepburn
performance data. The hoist is currently servicing the 1070 level, which is the deepest level of the mine. The hoist is capable of servicing the mine from the 680 level to the 1400 level, which is the undeveloped lower part of the mine
(approximately 715 metres deep).
 The Company intends to continue with exploration and a definition drilling program on the newly
discovered zones such as Esperanza, the “Cuerpos Pequenos” zones and now the Cuye - Mascota zone, which continue to offer high grade material within proximity of existing mine and infrastructure. Unlocking Yauricocha’s potential
through brownfield exploration and these new discoveries are a key part of the Company’s growth strategy. Focus will also be placed on the continued program on mechanization at the Bolivar Mine. 

Similar to the operational improvement program completed at the Yauricocha Mine in Peru, the Company is working on a similar program at
Bolivar in 2017. The Company’s focus at Bolivar this year will be on efforts that can improve production volume, increase throughput and increase recoveries at the Mill. 

  
 12 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Bolivar mine throughput has grown continually from 400 tonnes per day (tpd) in 2011 to 2,700
tpd currently, and its annual copper equivalent production has grown from 3.9 million pounds in 2011 to annual copper equivalent production of 21.2 million pounds in 2016. As tonnage production rates have increased at Bolivar, the Company
has realized modest reduction in its all-in sustaining costs, not truly reflecting the economies of scale of tonnage increases. This is primarily due to lower average copper head grades. 

The connection of the Agua Caliente power substation at Bolivar during February 2015 was another step completed in continuing to increase
throughput at the Piedras Verdes plant. A mine to mill optimization has been completed, to finalize all steps required to bring the throughput at Bolivar beyond 2,500 tpd which we hope to achieve during 2017. Partial key equipment purchases have
been procured during 2016 in the effort to make this objective a reality. Throughput during 2016 was approximately 2,800 tpd and the Company is also taking steps to increase the daily throughput to 3,000 tpd during 2017. 

Drilling programs also continue at Bolivar West, along with future plans to drill Bolivar North West, (skarn ore deposit area) to define high
grade copper zones. A geophysics program recently conducted has demonstrated anomalies with strong chargeability and resistivity zones. The work was conducted by Quantec Geosciences of Toronto, Ontario utilizing a Titan 24 Induced Polarization (IP)
program on a 400 HA land area at the Bolivar operation. 
 A planned 20,000-metre drilling program has been budgeted with 9,500 meters of
In-fill drilling planned at La Sidra and 11,500 meters at Bolivar West and Bolivar NorthWest. Currently drilling is being conducted on Bolivar West zone. The purpose of these programs is to define existing known areas. Once final results are
available from the geophysical program, further drilling programs will be carried out. 
 At Cusi, during 2016, the Company maintained
throughput at the off-site Mal Paso plant at approximately 534 tpd, and hopes to continue to increase throughput beyond 600 tpd in 2017. The lower throughput during 2016 was the result of exceptionally poor weather encountered at Cusi during the
last six months which caused flooding in various ramps within the mine which required additional pumping to be performed to de-water the ramps and resulted in the Company not having access to as many production stopes during the third and fourth
quarters. 
 The discovery and evaluation to date of the Santa Rosa de Lima zone demonstrates very important potential in our operations at
the Cusi Mine. We hope in the short term to have a better understanding of the 12 kilometer structural extension containing the Santa Rosa de Lima zone. Intercepts such as those returned in Cusi-6, Cusi-14 and Cusi-509 are common in epithermal
deposits of “bonanza” (High grade). There is reasonable potential to expand the Santa Lima da Rosa zone to depth and along strike to the NW and SE as these areas have never been drill tested. We look forward to an exciting future exploring
the Santa Lima da Rosa zone and the surrounding district. 
 A program of 15,000 meters of drilling is currently in execution at Cusi. This
program is targeted to investigate an area of one kilometer in length and 500 meters in depth in the target area defined by the previous drill holes. Drilling to date demonstrates that mineralization is consistent across the assessed area and lies
between 1,850 and 1,500 meters above sea level (150 to 550 meters below surface) in depth. To date there are four drills operating in the area to complete the program. 

  
 13 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The Company has a history of strong operating cash flow generation, as evidenced by $44.7
million of operating cash flows before movements in working capital generated during 2016, and had cash and cash equivalents of $42.1 million, and working capital of $9.6 million as at December 31, 2016. The Company is expending significant
efforts to maintain positive cash flow generation from its existing operations in order to reduce debt levels, fund required capital expenditures, and improve liquidity with the objective of reducing debt levels equal to or less than 1 times EBITDA.
The Company continues to believe that its’ treasury and future cash flows will be adequate to finance the capital expenditures budgeted at each of the three mines. 

Sierra shareholders approve share consolidation as predecessor to potential U.S. listing 

On September 27, 2016, a Special Meeting of Shareholders was held, whereby 98% of Sierra Metals’ shareholders voted in favour to
amend the Company’s articles to allow the consolidation of the issued and outstanding Common Shares of the Corporation on the basis of one post-consolidation Common Share for every two pre-consolidation Common Shares or such other consolidation
ratio that the directors of the Corporation deem desirable. Such ratio is to be no greater than one post-consolidation Common Share for every five pre-consolidation Common Shares. 

U.S. Listing 
 Sierra Metals has
determined that a listing on a US stock exchange will benefit the Company. However, to qualify for listing the price of the Common Shares must meet a minimum US$2.00 per share threshold. At the Company’s current share price a share
consolidation would not be necessary, however, the Company may need to complete a consolidation designed to increase the price of the Common Shares. The Company has been pre-approved to list on the New York Stock Exchange (“NYSE”) MKT
exchange by April 2017. 
 Spin-out of Peru Northern Properties 

Sierra Metals Inc. shareholders have voted at a special meeting of shareholders on February 16, 2017, to spin-out (the
“Spin-out”) to existing shareholders its 100% owned Las Lomas Project, into a new public entity called Cautivo Mining Inc. (“Cautivo”) by approving a reduction in the capital of the common shares of Sierra Metals for the capital
assigned to Cautivo Mining. The final voting results were 99.94% voting in favour of the capital reduction. On the completion of the Spin-out, Cautivo who are the developer of the properties’ main asset will be its indirect interest in the Las
Lomas Project (the “Las Lomas Project”) consisting of approximately 32,000 hectares of greenfield exploration properties located in northern Peru. 

2017 Production and Cost Guidance 

This section of the MD&A provides management’s production estimates for 2017. These are “forward-looking statements” and
subject to the cautionary note regarding the risks associated with forward-looking statements contained at the end of this document 

The Company anticipates 2017 silver equivalent production will range between 11.5 to 13.5 million ounces. Copper equivalent production
will range between 98.6 to 115.1 million pounds. The forecasted range includes increased production and higher recoveries at Yauricocha and Bolivar and increased throughput at Cusi. 

  
 14 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The Company has a significant amount of untapped potential for continued growth in volume,
mill throughput and delivering increased ore value to the mills which will increase cash flow and at current metal prices, should lead the Company to surpass previous EBITDA records in 2017. The Company also expects to see continued growth in
mineral resources and metals production and is continuing with a disciplined and well organized plan to unlock value and growth at all three Mines in 2017. Continued investment in our properties through brownfield exploration and key capital
expenditures to improve infrastructure and equipment will lay the ground work for continued increases in cashflow, metals production, grade and resources for Sierra Metals in 2017 and beyond. 

A table summarizing 2017 production guidance has been provided below: 
  

													
	 	  	 	 	  	 	 	  	2016
Actual	 
	 2017 Guidance
	  	Low	 	  	High	 	  
	 Silver ounces (000’s)
	  	 	2,987	 	  	 	3,485	 	  	 	2,979	 
	 Copper pounds (000’s)
	  	 	31,050	 	  	 	36,200	 	  	 	23,390	 
	 Lead pounds (000’s)
	  	 	31,100	 	  	 	36,300	 	  	 	40,551	 
	 Zinc pounds (000’s)
	  	 	61,800	 	  	 	72,100	 	  	 	56,610	 
	 Gold ounces
	  	 	7,800	 	  	 	9,100	 	  	 	8,604	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Silver equivalent ounces
(000’s) (1)
	  	 	11,534	 	  	 	13,454	 	  	 	11,952	 
	 Copper equivalent pounds
(000’s) (1)
	  	 	98,642	 	  	 	115,066	 	  	 	79,463	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 (1) 2017 Silver equivalent ounces & copper equivalent pounds were calculated using the following metal
prices: $19.50/oz ag, $2.28/lb Cu, $0.85/lb Pb, $1.05/lb Zn, $1,369/oz Au 
 A mine by mine breakdown of 2017 production guidance, cash
costs as well as all in sustaining costs (“AISC”) are included in the table below. Cash costs and AISC guidance is shown per payable silver equivalent ounce and copper equivalent pound. 

 

													
	 Mine
	  	Silver Eq
Oz (M)	  	Copper Eq
Lbs (M)	  	Cash Costs
per
AgEqOz or
CuEqLb
Sold	 	  	AISC ($)*
per
AgEqOz or
CuEqLb
Sold	 
	 Yauricocha (Ag Eq Oz)
	  	7.1 - 8.3	  	60.8 - 70.9	  	$	9.58/oz	 	  	$	12.29/oz	 
	 Bolivar (Cu Eq Oz)
	  	3.2 - 3.7	  	27.4 - 31.9	  	$	1.08/lb	 	  	$	1.74/lb	 
	 Cusi (Ag Eq Oz)
	  	1.2 - 1.4	  	10.5 - 12.3	  	$	10.90/oz	 	  	$	19.66/oz	 

 *AISC includes Treatment and Refining Charges, Selling Costs, G&A Costs and Sustaining Capex 

(1) 2017 Silver equivalent ounces & copper equivalent pounds were calculated using the following metal prices: $19.5/oz ag, $2.28/lb Cu, $0.85/lb Pb,
$1.05/lb Zn, $1,369/oz Au 
 2017 Capital Expenditures 

In 2017 the Company plans to invest a total of $49.0 million on capital expenditures including $25.3 million for sustaining requirements,
$23.7 million for expansion, growth projects and exploration expenses. This total represents a significant increase from 2016, however it will allow Sierra Metals to significantly grow mineral resources and increase production at all three projects
which will provide increased cash flow and lower cash costs. This program will be funded by operating cashflow. 
 The 2017 budget includes
a total of $8.6 million to be spent on property plant and equipment, $7.1 million towards underground development, $4.3 million in exploration and $29 million 

  
 15 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
towards corporate projects including shaft deepening at the Yauricocha Mine and new tailings deposition facilities at the Bolivar & Cusi Mines. Management will continue to review metal
prices and retains the option to adjust the 2017 budget should metal prices experience any dramatic changes in 2017. 
 A breakdown by Mine
of the tonnage and grade, throughput and planned capital investments is shown below: 
 The Yauricocha Mine in Peru plans to process up to
1.0 million tonnes (2,850 tpd) in 2017. Sustaining Capex will be approximately $9.8 million and growth Capex will be approximately $6.9 million. 

2017 major capital investments include: 
  

	 	•	 	 $5.5 million for deepening of the Yauricocha Shaft 

	 	•	 	 $1.4 million for the completion of the Yauricocha Tunnel 

	 	•	 	 $5.0 million for brownfield exploration and existing definition drilling and development

 The Bolivar Mine in Mexico plans to process up to 1.1 million tonnes with initial production at 3,000 tpd with an
objective to reach 3,500 tpd by year end in 2017. Sustaining Capex will be approximately $15.8 million and growth Capex will be approximately $3.5 million. 

2017 major capital investments include: 
  

	 	•	 	 $6.1 million for tailings deposition facility expansion, move to dry stack application 

	 	•	 	 $4.9 million for equipment overhaul and replacement 

	 	•	 	 $4.1 million for brownfield exploration and existing definition drilling and development

 The Cusi Mine in Mexico plans to process up to 221,000 tonnes (600 tpd) in 2017. Sustaining Capex will be approximately
$8.4 million and growth Capex will be $0.3 million. 
 2017 major capital investments include: 

 

	 	•	 	 $2.6 million for tailings deposition facility 

	 	•	 	 $2.4 million for brownfield exploration and existing definition drilling and development

 Market Review and Trends 
 Metal
Prices 
 One of the primary drivers of Sierra’s earnings and ability to generate operating cash flows are the market prices of silver,
copper, zinc, lead and gold, which were approximately 10% higher for silver, zinc and gold, 2% higher for lead and 11% lower for copper during 2016 compared to the average prices for 2015. There has also been a strong upswing in base metal prices
during Q4 2016 as the prices of copper (9%), lead (23%) and zinc (59%) have all increased significantly compared to Q4 2015. A shortage of non-ferrous raw materials combined with an improved view of the Chinese economy have, in recent
months, had a positive impact on the prices. 

  
 16 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

																	
	 LME Average Prices
	  	Three months ended
December 31,	 	  	Year ended
December 31,	 
	(In US dollars)	  	2016	 	  	2015	 	  	2016	 	  	2015	 
	 Silver (oz)
	  	 	$17.19	 	  	 	$14.76	 	  	$	17.10	 	  	$	15.70	 
	 Copper (lb)
	  	 	$  2.39	 	  	 	$  2.22	 	  	$	2.21	 	  	$	2.49	 
	 Lead (lb)
	  	 	$  0.94	 	  	 	$  0.78	 	  	$	0.85	 	  	$	0.81	 
	 Zinc (lb)
	  	 	$  1.14	 	  	 	$  0.73	 	  	$	0.95	 	  	$	0.87	 
	 Gold (oz)
	  	 	$1,260	 	  	 	$1,105	 	  	$	1,248	 	  	$	1,161	 

 Since February 2016, supply concerns, prevailing low to negative interest rates and political uncertainty led
to renewed investment demand in precious metals in comparison to the last nine months of 2015. However, nearing the end of 2016, the U.S. election results revived the sentiment towards the U.S. economy and U.S. dollar, resulting in both silver and
gold prices depreciating against the U.S. currency. During Q4 2016, the prices of silver and gold increased compared to Q4 2015, with the price ranging from $15.72 to $29.12 per ounce for silver and $1,141 to $1,306 per ounce for gold. Sierra’s
average realized silver price for Q4 2016 was $16.82 per ounce compared to $14.76 per ounce in Q4 2015. Sierra’s average realized gold price for Q4 2016 was $1,210 per ounce compared to $1,096 per ounce in Q4 2015. 

In early November, copper prices increased over $0.50/lb in two weeks after being on a downward trend since February 2011 when prices peaked
above $4.60/lb. Copper consumption continues to rise at better than projected rates, although still lower than in 2015. Stronger than expected construction and automotive growth have offset manufacturing declines. The large increases in global mine
production growth over the past two years are now mostly complete and mine production growth is expected to fall during 2017. Despite the recent rally in prices and stable metal markets, the market remains cautious in the short to medium-term.
During Q4 2016, copper prices traded in a range of $2.18 to $2.67 per pound with an average quarterly price of $2.39 per pound compared with $2.22 per pound in Q4 2015. Sierra’s average realized copper price for Q4 2016 was $2.38 per pound
compared to $2.19 per pound in Q4 2015. 
 During Q4 2016, zinc prices traded in a range of $1.03 to $1.27 per pound with an average
quarterly price of $1.14 compared with $0.73 per pound in Q4 2015. Sierra’s realized zinc price for Q4 2016 was $1.16 per pound compared to $0.73 per pound in Q4 2015. A continued lack of investment in new zinc mine production, along with
anticipated closures of major zinc mines is likely to result in a continuation of the decline of zinc metal inventories that began in 2013 and resulted in a significant deficit in the global zinc metal market and limited availability of physical
metal within the next two years. Zinc prices have recovered significantly during 2016 with an average price of $0.98. Total reported zinc exchange stocks fell 28,400 tonnes during Q4 2016 to 580,700 tonnes, and year-to-date exchange stocks are down
84,200 tonnes. Total global reported exchange stocks are estimated at 15 days of global consumption, down from the 25 year average of 23 days. Excess zinc metal stocks also continue to be drawn down from non-LME warehouses. 

  
 17 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Lead prices traded in a range of $0.89 to $1.07 per pound in Q4 2016. Sierra’s realized
lead price during Q4 2016 was $0.95 per pound compared to $0.77 per pound in Q4 2015. 
 Currency Exchange Rates 

The results of Sierra’s operations are affected by US dollar exchange rates. Sierra’s largest exposures are to the US
dollar/Peruvian Nuevo Sol exchange rate and the US dollar/Mexican Peso exchange rate which impacts operating and administration costs in Peru and Mexico incurred in Nuevo Soles and Pesos while revenues are earned in US dollars. As at
December 31, 2016 the US dollar/Peruvian Nuevo Sol exchange rate was 3.35 (December 31, 2015: 3.41) and the US dollar/Mexican Peso exchange rate was 20.74 (December 31, 2015: 17.25). A 10% change in the value of the Nuevo Sol and Peso
against the US dollar would result in a change of $4.2 million and $1.4 million in the Company’s net profit, respectively, assuming that our operational performance during 2016 was consistent with 2015. 

The Company also has a minor exposure to the Canadian dollar through corporate administrative costs. 

  
 18 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	5.	 RESULTS OF OPERATIONS 

Selected Production Results on a Mine-by-Mine Basis for the Past Eight Quarters 

 

																																	
	 	  	2016	 	  	2015	 
	 Production Highlights
	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 
	 Ore Processed/tonnes milled
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	 	236,650		  	 	237,429	 	  	 	215,510		  	 	207,580		  	 	193,710		  	 	193,558	 	  	 	224,988		  	 	219,969	
	 Bolivar
	  	 	245,000		  	 	250,261	 	  	 	236,252		  	 	218,886		  	 	211,311		  	 	206,318	 	  	 	209,459		  	 	203,359	
	 Cusi
	  	 	36,055		  	 	48,863	 	  	 	52,226		  	 	49,753		  	 	51,821		  	 	52,206	 	  	 	48,928		  	 	49,079	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	 	517,705		  	 	536,553	 	  	 	503,988		  	 	476,219		  	 	456,842		  	 	452,082	 	  	 	483,374		  	 	472,407	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Silver ounces produced (000’s)
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	 	550		  	 	545	 	  	 	463		  	 	283		  	 	287		  	 	377	 	  	 	577		  	 	550	
	 Bolivar
	  	 	98		  	 	95	 	  	 	106		  	 	97		  	 	103		  	 	85	 	  	 	114		  	 	139	
	 Cusi
	  	 	140		  	 	172	 	  	 	211		  	 	207		  	 	213		  	 	228	 	  	 	221		  	 	211	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	 	788		  	 	812	 	  	 	780		  	 	588		  	 	603		  	 	691	 	  	 	911		  	 	900	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Copper pounds produced (000’s)
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	 	1,720		  	 	1,740	 	  	 	959		  	 	1,863		  	 	1,047		  	 	770	 	  	 	2,037		  	 	1,712	
	 Bolivar
	  	 	4,433		  	 	4,417	 	  	 	4,287		  	 	3,974		  	 	4,447		  	 	3,939	 	  	 	4,471		  	 	4,772	
	 Cusi
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	 	6,152		  	 	6,156	 	  	 	5,245		  	 	5,836		  	 	5,493		  	 	4,709	 	  	 	6,508		  	 	6,484	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Lead pounds produced (000’s)
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	 	9,295		  	 	10,651	 	  	 	9,550		  	 	6,944		  	 	6,814		  	 	10,127	 	  	 	10,751		  	 	11,738	
	 Bolivar
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 
	 Cusi
	  	 	695		  	 	999	 	  	 	1,105		  	 	1,312		  	 	1,106		  	 	899	 	  	 	365		  	 	377	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	 	9,990		  	 	11,650	 	  	 	10,655		  	 	8,256		  	 	7,920		  	 	11,026	 	  	 	11,116		  	 	12,115	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Zinc pounds produced (000’s)
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	 	16,776		  	 	14,041	 	  	 	13,708		  	 	10,281		  	 	9,265		  	 	9,332	 	  	 	13,019		  	 	10,461	
	 Bolivar
	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 
	 Cusi
	  	 	263		  	 	394	 	  	 	510		  	 	638		  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	—  	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	 	17,039		  	 	14,435	 	  	 	14,218		  	 	10,919		  	 	9,265		  	 	9,332	 	  	 	13,019		  	 	10,461	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Gold ounces produced
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	 	908		  	 	1,457	 	  	 	1,237		  	 	1,062		  	 	1,041		  	 	1,158	 	  	 	1,232		  	 	1,587	
	 Bolivar
	  	 	801		  	 	583	 	  	 	743		  	 	859		  	 	833		  	 	660	 	  	 	804		  	 	919	
	 Cusi
	  	 	158		  	 	265	 	  	 	217		  	 	314		  	 	327		  	 	208	 	  	 	141		  	 	155	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	 	1,867		  	 	2,305	 	  	 	2,197		  	 	2,235		  	 	2,201		  	 	2,026	 	  	 	2,177		  	 	2,661	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
			
	 	  	2016	 	  	2015	 
	 Production Highlights
	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 
	 Silver equivalent ounces produced (000’s)1
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	 	2,170		  	 	2,138		  	 	1,852		  	 	1,496		  	 	1,319		  	 	1,542		  	 	2,152		  	 	2,024	
	 Bolivar
	  	 	825		  	 	803		  	 	806		  	 	759		  	 	834		  	 	727		  	 	846		  	 	925	
	 Cusi
	  	 	199		  	 	260		  	 	307		  	 	327		  	 	292		  	 	288		  	 	249		  	 	241	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	 	3,194		  	 	3,201		  	 	2,965		  	 	2,582		  	 	2,444		  	 	2,556		  	 	3,247		  	 	3,190	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Copper equivalent pounds produced (000’s)1
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	 	14,425		  	 	14,216		  	 	12,314		  	 	9,948		  	 	8,768		  	 	10,254		  	 	14,308		  	 	13,456	
	 Bolivar
	  	 	5,483		  	 	5,339		  	 	5,362		  	 	5,046		  	 	5,542		  	 	4,833		  	 	5,623		  	 	6,147	
	 Cusi
	  	 	1,324		  	 	1,729		  	 	2,038		  	 	2,170		  	 	1,940		  	 	1,914		  	 	1,658		  	 	1,603	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	 	21,232		  	 	21,284		  	 	19,714		  	 	17,164		  	 	16,250		  	 	17,002		  	 	21,589		  	 	21,206	
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cash cost per tonne processed
	  				  				  				  				  				  				  				  			
	 Yauricocha
	  	$	56.15	 	  	$	56.17	 	  	$	55.41	 	  	$	55.30	 	  	$	57.17	 	  	$	55.24	 	  	$	48.34	 	  	$	50.78	 
	 Bolivar
	  	$	21.88	 	  	$	22.99	 	  	$	26.40	 	  	$	26.55	 	  	$	25.06	 	  	$	32.56	 	  	$	28.14	 	  	$	25.89	 
	 Cusi
	  	$	57.83	 	  	$	47.21	 	  	$	42.57	 	  	$	50.38	 	  	$	48.17	 	  	$	41.20	 	  	$	38.22	 	  	$	31.43	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Consolidated
	  	$	40.06	 	  	$	39.87	 	  	$	40.48	 	  	$	41.57	 	  	$	41.30	 	  	$	43.27	 	  	$	40.01	 	  	$	38.05	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 (1) Silver equivalent ounces and copper equivalent pounds were calculated using the following metal prices:
$14.96/oz Ag, $2.25/lb Cu, $0.75/lb Pb, $0.73/lb Zn, $1,113/oz Au. 
 In 2016 consolidated metal production increased by 4% compared to
2015 and represented the second highest level of annual metal production in the Company’s history. During Q4 2016, consolidated metal production increased 31% compared to Q4 2015, and resulted in the achievement of the second highest level of
quarterly metals production in the Company’s history. The increase in metal production compared to Q4 2015 was due to higher throughput, head grades and recoveries at the Yauricocha Mine in Peru. This was partially offset by a decrease in head
grades and recoveries at the Bolivar Mine, and the decrease in throughput, head grades and recoveries at the Cusi Mine. 

  
 19 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 At the Bolivar Mine in Mexico, the Company saw a significant increase in throughput, but was
hindered by lower grades which led to a minor reduction in copper equivalent production when compared to Q4 2015. The Company will focus on continuing to increase production volume while improving the value per tonne of ore mined at Bolivar in 2017.
At Cusi, poor weather and significant rainfall caused flooding in ramps which led to stope unavailability resulting in lower production, however we will continue to seek improvement at Cusi with better grade control and selective mining practices.

 During Q4 2016, consolidated silver and copper equivalent production increased 31% compared to Q4 2015, despite just a 13% increase in
throughput and was the third best quarter of silver and copper equivalent production in the Company’s history. In addition to the increase in throughput, the increased metal production was also due to higher head grades of silver, copper and
zinc, and higher recoveries for all metals, except gold, at Yauricocha; as well as increased recoveries of all metals, except copper, at Bolivar. This was partially offset by a decrease in head grades of all metals at the Bolivar Mine, and the
decrease in throughput, and head grades and recoveries of all metals at the Cusi Mine. 
 The Company continues to see significant
improvements in the operations at Yauricocha, as we have completed the restructuring process at the mine. Silver equivalent production increased by 65%, despite just a 22% increase in throughput, in Q4 2016 versus Q4 2015 as the Company continued to
focus on the production of higher grade material to maximizing metal content and profitability. 
  

																									
	 Consolidated Production
	  	Three Months Ended	 	 	Year Ended	 
	 	  	December 31,
2016	 	  	December 31,
2015	 	  	% Var	 	 	December 31,
2016	 	  	December 31,
2015	 	  	% Var	 
	 Tonnes processed
	  	 	517,705		  	 	456,842		  	 	13	% 	 	 	2,034,465		  	 	1,864,706		  	 	9	% 
	 Daily throughput
	  	 	5,917		  	 	5,221		  	 	13	% 	 	 	5,813		  	 	5,328		  	 	9	% 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Silver ounces (000’s)
	  	 	789		  	 	603		  	 	31	% 	 	 	2,979		  	 	3,105		  	 	-4	% 
	 Copper pounds (000’s)
	  	 	6,153		  	 	5,493		  	 	12	% 	 	 	23,390		  	 	23,197		  	 	1	% 
	 Lead pounds (000’s)
	  	 	9,990		  	 	7,920		  	 	26	% 	 	 	40,551		  	 	42,177		  	 	-4	% 
	 Zinc pounds (000’s)
	  	 	17,039		  	 	9,265		  	 	84	% 	 	 	56,610		  	 	42,077		  	 	35	% 
	 Gold ounces
	  	 	1,867		  	 	2,201		  	 	-15	% 	 	 	8,604		  	 	9,066		  	 	-5	% 
	 Silver equivalent ounces (000’s) (1)
	  	 	3,194		  	 	2,444		  	 	31	% 	 	 	11,952		  	 	11,439		  	 	4	% 
	 Copper equivalent pounds (000’s) (1)
	  	 	21,233		  	 	16,250		  	 	31	% 	 	 	79,463		  	 	76,051		  	 	4	% 
	 Metals payable in concentrates
	  				  				  				 				  				  			
	 Silver ounces (000’s)
	  	 	684		  	 	555		  	 	23	% 	 	 	2,520		  	 	2,854		  	 	-12	% 
	 Copper pounds (000’s)
	  	 	6,210		  	 	5,309		  	 	17	% 	 	 	21,258		  	 	21,973		  	 	-3	% 
	 Lead pounds (000’s)
	  	 	9,547		  	 	7,593		  	 	26	% 	 	 	37,781		  	 	40,171		  	 	-6	% 
	 Zinc pounds (000’s)
	  	 	14,231		  	 	7,562		  	 	88	% 	 	 	48,042		  	 	35,161		  	 	37	% 
	 Gold ounces
	  	 	1,062		  	 	1,059		  	 	0	% 	 	 	5,735		  	 	5,380		  	 	7	% 
	 Silver equivalent ounces (000’s) (1)
	  	 	2,605		  	 	2,132		  	 	22	% 	 	 	10,117		  	 	10,289		  	 	-2	% 
	 Copper equivalent pounds (000’s) (1)
	  	 	17,656		  	 	14,507		  	 	22	% 	 	 	67,261		  	 	68,408		  	 	-2	% 

 (1) Silver equivalent ounces and copper equivalent
pounds were calculated using the following metal prices: $14.96/oz Ag, $2.25/lb Cu, $0.75/lb Pb, $0.73/lb Zn, $1,113/ox Au. 

  
 20 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The Peruvian Operation 

Yauricocha Mine, Yauyos, Peru 

Corona’s main asset, Yauricocha, is an underground mine located in western central Peru in the Yauyos province, approximately 12 km
west of the Continental Divide. The Yauricocha property covers 18,778 hectares that straddle a 20 km strike length of the prolific Yauricocha fault, a major ore controlling structure in this part of western central Peru. The mine is at an average
altitude of 4,600 meters and has been producing for more than 68 years. Ore is processed at the on-site Chumpe plant using a combination of crushing, grinding and flotation and is soon to be permitted to produce at a rate of 3,000 tpd. The ore is
treated in two separate circuits and is extracted from three different types of deposits which include the following: 
  

	 	-	 	 A polymetallic deposit, containing silver, lead, zinc, copper, and gold 

	 	-	 	 A lead oxide deposit, containing lead, silver and gold 

	 	-	 	 A copper oxide deposit, containing copper, silver, lead and gold 

Esperanza Zone: 
 During the first
quarter of 2016 Sierra announced the discovery of a new high grade sulfide zone, referred to as the “Esperanza” zone, located 100 meters along strike from current mining activities. The discovery has returned the thickest sulfide
intercepts in the 68 year mining history at Yauricocha and comes as part of ongoing drill testing of priority targets at the Yauricocha Mine (please see news release dated January 28, 2016). 

Recent exploration development and test stope programs from the Esperanza zone have provided material which is currently being processed at
the Chumpe plant, located in the Lima District, Peru. 
 The Company announced the results of its continuing drill program at Esperanza
which reveal that the zone is open on strike and at depth and comes as part of an ongoing drill program at this high priority target at the Yauricocha Mine. 

Current Program Drill hole highlights include: 
 Hole
D-ESP-02: 1.54% Cu, 3.99% Zn, 1.49% Pb, 0.70 gpt Au, 52.42 gpt Ag over 48.5m 
 Hole D-ESP-03: 1.03% Cu, 17.43% Zn, 7.56% Pb, 0.35 gpt Au, 154.38 gpt
Ag over 22.1m 
 Hole D-ESP-01B: 3.34% Cu, 2.62% Zn, 1.02% Pb, 0.67 gpt Au, 76.39 gpt Ag over 34.50m 

The Company continues with the exploration, development and definition drill program on the Esperanza ore body from the 1070 level of the mine
which is the deepest level in the mine. The program continues to realize intercepts at depth (100 meters below previously drilled holes) in two holes drilled at -50 degree angles as well as with five horizontal holes providing evidence of increased
mineralization at the 1070 level. Drilling will continue from the 1070 level horizon with additional flat holes to the south of hole D-ESP-05 as well with additional inclined holes at depth. 

The current program reports seven holes drilled with assay results from ALS Minerals Laboratories. The program identified the continuance of
the orebody on the 1070 level with an intermittent strike length of 150 meters with widths varying from 2 meters to sections in excess of 

  
 21 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
20 meters with zones of lead and zinc sulfide mineralization as well as zones of predominantly copper sulfide mineralization. At depth, mineralization continues below the 1170 level horizon.

 The current drill program has, in addition to intercepts at the Esperanza zone, also intercepted new “Cuerpos Pequenos” ore
bodies with high grade lead, zinc, and silver values. These new small ore bodies on the 1070 level were not present in the upper part of the mine near the Central orebody nor in the Mascota mining area. There exists a possibility that this type of
discovery could also be present in the Central ore body zone to the East of Esperanza on the 1070 level horizon since this area has not been explored or developed to the extent of Esperanza. 

As it stands now the Esperanza zone extends from the 870 to below the 1170 level of the mine and has a demonstrated strike length in excess of
240 meters in the upper levels of the mine. The Company is optimistic that the mineralization will continue to the South and North on strike. 

Discovery of new high grade sulphide Cuye-Mascota Zone 

On November 17, 2016 the Company announced the discovery of a new high grade sulfide zone referred to as the “Cuye - Mascota”
zone, located 200 meters north of the central mine area along strike and adjacent to current mining activities. The discovery comes as part of ongoing diamond drill brownfield exploration programs testing priority targets at its Yauricocha Mine
located 150 kilometers southeast of Lima in the Yauricocha Mining District (Cordillera Occidental), Peru. A total of seven drill holes have been drilled to date on the Cuye - Mascota orebody, which is located at the extreme south end of the Mascota
oxide orebody. The Company continues with exploration drilling activities in areas below the Cuye and Mascota ore bodies and will continue to report assay results as they become available. 

Drill hole highlights include: (for a complete table of drill results please see Company press release dated
November 17, 2016) 
  

	 	•	 	 Hole MAS-09: 4.90% Cu, 0.89% Zn, 0.37% Pb, 0.23 gpt Au, 226.45 gpt Ag over 18.2m 

	 	•	 	 Hole MAS-17: 0.46% Cu, 17.71% Zn, 4.13% Pb, 0.94 gpt Au, 125.16 gpt Ag over 30.10m 

	 	•	 	 Hole MAS-23: 0.73% Cu, 28.85% Zn, 1.45% Pb, 0.35 gpt Au, 149.00 gpt Ag over 7.55m 

	 	•	 	 Hole MAS-23: 2.72% Cu, 0.43% Zn, 0.09% Pb, 2.12 gpt Au, 102.95 gpt Ag over 20.00m 

	 	•	 	 Hole MAS-27: 0.39% Cu, 12.59% Zn, 3.46% Pb, 0.68 gpt Au, 91.91 gpt Ag over 9.60m 

	 	•	 	 Hole MAS-27: 1.32% Cu, 0.53% Zn, 0.05% Pb, 0.87 gpt Au, 45.67 gpt Ag over 8.80m 

As a result of this drilling program, continued mineralization has been identified in the Cuye - Mascota zone, as well as other important
structures such as the extension of the existing Mascota zone. This has provided the Company with important information that had been previously unknown. This new information will be reported in the next resource review conducted by the Company,
expected to be released during Q2 2017. 
 New Hoist Installation at Mascota Shaft 720 Level, Yauricocha Mine 

During the month of November 2016, the Company transitioned from the prevoius operating surface hoist to a new Hepburn 104 x 45
double drum 1100 HP production hoist currently installed on the 720 level, where it will service the Mascota Shaft. This new hoist has an installed capacity of 106,000 metric tonnes (“MT”) per month based on Hepburn performance data.
The hoist is 

  
 22 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
capable of servicing the mine from the 680 level to the 1400 level, which is the undeveloped lower part of the mine (approximately 715 metres deep). The hoist is currently servicing the deepest
level (1070 level) of the mine and is capable of servicing the mine from the 680 level to the 1400 level, which is the undeveloped lower part of the mine (approximately 715 metres deep). 

The Hepburn hoist will be hoisting from the 680 level to below the 1070 level (last level accessible from Mascota shaft) so that the hoisting
distance is reduced to approximately 365 metres. With the shorter hoist distance, we expect to achieve other benefits including reduced hoist time, improved duty cycle as well as less hoist rope in movement in the shaft. Overall, once final
commissioning and implementation is complete, management expects that there may be more opportunity to benefit from increased hoisting capacity in excess of the 106,000 MT per month capacity due to the shorter skipping distance. 

The new hoist is expected to increase the current hoisting capacity by approximately 30,000 MT per month, and will help as we continue with
our goal of increasing production in the future at Yauricocha. The current CIR hoist has an installed capacity to skip 70,000 MT per month from the mine. The Company completed key aspects of the operational improvements program this quarter
including the transitioning to a higher capacity hoist at the Mascota shaft and has returned to normalized operations. 
 The Company has
focused heavily on developing the 1070 level and many activities were executed during 2016 including: excavations for an underground shop, explosives magazines, drill stations, access to Mascotaf ramp and access to two loading pockets in the Mascota
shaft. All of this development work, as well a development drive to the Esperanza zone, is being carried out with a trackless development program with a dedicated jumbo drill on the level as well as a group of LHD equipment. 

Central mine zone 
 Definition drilling
targeting 16 metres below the 1020 level at the Catas stope, further definition drilling targets to the 970 level for the Antacaca Sur, Antacaca and Rosaura stopes. This definition drilling provides for continued production this year and into part
of next year. 
 Cachi Cachi 

Definition drilling completed on targets Angelita, Carlita, Elisa to 16 metres below the 820 level. Deeper drilling at the Cachi Cachi zone is
planned to define mineralization below the 820 level down to the 920 level. Targets in this Brownfield program are Manuelita, Raquelita, Carmencita and Privasadora. All are known high grade zones that the mine uses to regulate mill feed head grade.

 Regional Target Areas 
 The Company
has initiated basic mapping and sampling over portions of the property. Initial results from sampling of a gossan zone along Yauricocha Fault 2 has returned elevated silver and lead values located at the marble – granodiotite contact.
Additional follow-up will be planned once drill permits are received. 

  
 23 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Yauricocha Production 

A summary of contained metal production from the Yauricocha Mine for the three and twelve months ended December 31, 2016 has been
provided below: 
  

																									
	 Yauricocha Production
	  	3 Months Ended	 	 	12 Months Ended	 
	 	  	Dec 31, 2016	 	 	Dec 31, 2015	 	 	% Var.	 	 	Dec 31, 2016	 	 	Dec 31, 2015	 	 	% Var.	 
	 Tonnes processed (mt)
	  	 	236,650	 	 	 	193,710	 	 	 	22	% 	 	 	897,169	 	 	 	832,225	 	 	 	8	% 
	 Daily throughput
	  	 	2,705	 	 	 	2,214	 	 	 	22	% 	 	 	2,563	 	 	 	2,378	 	 	 	8	% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Silver grade (g/t)
	  	 	100.37	 	 	 	86.13	 	 	 	17	% 	 	 	97.69	 	 	 	102.62	 	 	 	(5	)% 
	 Copper grade
	  	 	0.51	% 	 	 	0.38	% 	 	 	35	% 	 	 	0.54	% 	 	 	0.49	% 	 	 	9	% 
	 Lead grade
	  	 	2.18	% 	 	 	2.46	% 	 	 	(11	)% 	 	 	2.52	% 	 	 	2.93	% 	 	 	(14	)% 
	 Zinc grade
	  	 	3.63	% 	 	 	2.48	% 	 	 	46	% 	 	 	3.18	% 	 	 	2.57	% 	 	 	24	% 
	 Gold Grade (g/t)
	  	 	0.59	 	 	 	0.63	 	 	 	(6	)% 	 	 	0.64	 	 	 	0.70	 	 	 	(8	)% 
	 Silver recovery
	  	 	72.05	% 	 	 	53.53	% 	 	 	35	% 	 	 	65.34	% 	 	 	65.23	% 	 	 	0	% 
	 Copper recovery
	  	 	64.75	% 	 	 	64.94	% 	 	 	0	% 	 	 	59.26	% 	 	 	61.68	% 	 	 	(4	)% 
	 Lead recovery
	  	 	81.72	% 	 	 	64.98	% 	 	 	26	% 	 	 	73.07	% 	 	 	73.28	% 	 	 	0	% 
	 Zinc recovery
	  	 	88.49	% 	 	 	87.45	% 	 	 	1	% 	 	 	87.18	% 	 	 	89.38	% 	 	 	(2	)% 
	 Gold Recovery
	  	 	20.06	% 	 	 	26.38	% 	 	 	(24	)% 	 	 	25.19	% 	 	 	26.74	% 	 	 	(6	)% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Silver ounces (000’s)
	  	 	550	 	 	 	287	 	 	 	92	% 	 	 	1,841	 	 	 	1,791	 	 	 	3	% 
	 Copper pounds (000’s)
	  	 	1,720	 	 	 	1,047	 	 	 	64	% 	 	 	6,281	 	 	 	5,567	 	 	 	13	% 
	 Lead pounds (000’s)
	  	 	9,295	 	 	 	6,814	 	 	 	36	% 	 	 	36,440	 	 	 	39,430	 	 	 	(8	)% 
	 Zinc pounds (000’s)
	  	 	16,776	 	 	 	9,265	 	 	 	81	% 	 	 	54,805	 	 	 	42,077	 	 	 	30	% 
	 Gold ounces
	  	 	908	 	 	 	1,041	 	 	 	(13	)% 	 	 	4,664	 	 	 	5,018	 	 	 	(7	)% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Silver equivalent ounces (000’s)(1)
	  	 	2,170	 	 	 	1,319	 	 	 	65	% 	 	 	7,656	 	 	 	7,037	 	 	 	9	% 
	 Copper equivalent pounds (000’s)(1)
	  	 	14,425	 	 	 	8,768	 	 	 	65	% 	 	 	50,903	 	 	 	46,788	 	 	 	9	% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 

  

	(1)	 Silver equivalent ounces & copper equivalent pounds were calculated using the following metal prices:
$14.96/oz Ag, $2.25/lb Cu, $0.75/lb Pb, $0.73/lb Zn, $1,113/oz Au. 

 The Yauricocha mine processed a total of 897,169
tonnes in 2016 representing an 8% increase from 2015. The Mine also processed a total of 236,650 tonnes in Q4 2016 representing a 22% increase compared to Q4 2015. Higher metal production was driven by increased throughput, higher silver, copper and
zinc head grades; higher recoveries of all metals, except gold, which were a consequence of higher head grades in the ore sources available to be mined in Q4 2016 versus Q4 2015 as the Esperanza Zone and the cuerpos chicos zones continued to
contribute to the metal production. 
 For 2016 year over year silver production was 4% lower, lead production was 4% lower and gold
production was 5% lower. This was offset by a 1% increase in copper production and a 35% increase in zinc production from 2015. The Company continues to see positive improvements from the restructuring at Yauricocha and the continuation of the
Esperanza zone into the production schedule in Q4 2016 as evidenced by a 65% increase in silver equivalent production over Q4 2015. During Q4 2016 the Company also saw an increase in the production of all metals, except gold, with increases in
production of silver 92%, copper 64%, zinc 81%, and lead 36%, during Q4 2016 compared to Q4 2015. 

  
 24 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The Mexican Operations 

Bolivar Mine, Chihuahua State 
 The
Bolivar Mine is a contiguous portion of the 15,217 hectare Bolívar Property land package within the municipality of Urique, in the Piedras Verdes mining district of Chihuahua State, Mexico. During 2012, the Company achieved its first full
year of commercial production at the new Piedras Verdes plant, which is located 6 kilometres from the Bolivar Mine that had an initial capacity of 1,000 tpd. In September 2013, the Piedras Verdes plant further increased its daily throughput capacity
to 2,000 tpd by installing a new circuit. The Company is currently producing at a rate of approximately 2,700 tpd and expects to increase this throughput rate to 3,000 tpd and higher during 2017 and beyond. 

Mine development at Bolívar during Q4 2016 totaled 1,112 m. Most of these meters (746) were developed to prepare stopes for mine
production. The remainder of the meters (366) were related to the deepening of ramps and developing service ramps to be used for ventilation and pumping. 

During 2016, exploration drilling continued along the Bolivar West fault area and the Company drilled a total of 11,749 meters in this area;
while 3,473 meters were drilled in the El Gallo Inferior area. 
 La Sidra 

On March 6, 2017 the Company announced the results of the initial drill program on the Bolivar property in Chihuahua State, Mexico and
continues to define high grade silver-gold and polymetallic mineralization within the La Sidra vein. The mineralized zone currently extends to over 500 meters in length and to 300 meters in depth and is still open along strike and down dip. 

Drilling programs also continue at Bolivar West with future plans to drill Bolivar North West (skarn ore deposit area) to define high grade
copper with coincident strong chargeability and within resistivity zones detected during a recently completed a 400 Hectare Titan 24 Induced Polarization (‘IP’) survey conducted by Quantec Geosciences of Toronto, Ontario. 

A planned 20,000-metre drilling program has been budgeted with 9,500 meters of In-fill drilling planned at La Sidra and 11,500 meters at
Bolivar West and Bolivar NorthWest. Currently drilling is being conducted on Bolivar West zone. The purpose of these programs is to define existing known areas. Once final results are available from the geophysical program, further drilling programs
will be carried out. 
 Feeders/Breccias at El Gallo Zone to Depth 

The area of El Gallo, which is the current focus of mining operations, has associated breccias and feeder zones which correspond to epithermal
deposits. These breccias are composed of andesite clasts and granodiarite skarn matrix formed by calcite and quartz. The feeders are formed by calcite-quartz veinlets with chalcopyrite nodules which are important copper bearing conduits. To date,
the known dimensions of the breccias range from 60 to 120 metres in length and 20 to 25 metres in thickness, with a vertical height range of 13 to 14 metres. The feeders are known to have a depth of 150 metres below the top level of the Mina del
Fierro magnetite. Drilling is currently taking place in this area and it is believed that these mineralized bodies will continue to grow at depth. 

  
 25 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Bolivar NW (Skarn) 

The area of Bolivar NW, approximately 3 kilometres to the north of existing operations at El Gallo, is understood to be a replacement deposit
in stratiform Northwest – Southeast direction. It is a calcosilicate skarn, present in the deposit varying between semi massive economic mineralization with the presence of magnetite and chalcopyrite nodules. The mineralized body is being
explored with diamond drilling towards the Southeast with the possible connection to the El Gallo Zone. The current defined strike length is approximately one kilometre along the structure. The Company expects that at completion of the current
diamond drilling program, a possible expansion of the current known orebody will result. 
 West Bolivar (Skarn) 

The West Bolivar deposit, approximately 2 kilometres Southwest of El Gallo and across a fault, is a copper-zinc skarn that has developed
adjacent to a contact in the volcano-sedimentary sequence and a hidden granodiorite body. Diamond drilling is currently taking place on known target areas. Intercepts of copper mineralization have provided positive progress on this program. The
potential mineralized area covers an area approximately 240 metres long (East-West) and 300 metres (North-South). The opportunity exists to potentially develop significant tonnage with potential economic grades. 

Bolivar Production 
 A summary of
contained metal production from the Bolivar Mine for the three and twelve months ended December 31, 2016 has been provided below: 
  

																									
	 Bolivar Production
	  	3 Months Ended	 	 	12 Months Ended	 
	 	  	Dec 31, 2016	 	 	Dec 31, 2015	 	 	% Var.	 	 	Dec 31, 2016	 	 	Dec 31, 2015	 	 	% Var.	 
	 Tonnes processed (mt)
	  	 	245,000	 	 	 	211,311	 	 	 	16	% 	 	 	950,398	 	 	 	830,447	 	 	 	14	% 
	 Daily throughput
	  	 	2,800	 	 	 	2,415	 	 	 	16	% 	 	 	2,715	 	 	 	2,373	 	 	 	14	% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Copper grade
	  	 	0.99	% 	 	 	1.13	% 	 	 	(13	)% 	 	 	1.00	% 	 	 	1.15	% 	 	 	(13	)% 
	 Silver grade (g/t)
	  	 	15.53	 	 	 	19.37	 	 	 	(20	)% 	 	 	16.72	 	 	 	20.57	 	 	 	(19	)% 
	 Gold grade (g/t)
	  	 	0.18	 	 	 	0.31	 	 	 	(40	)% 	 	 	0.19	 	 	 	0.30	 	 	 	(35	)% 
	 Copper recovery
	  	 	83.03	% 	 	 	84.29	% 	 	 	(1	)% 	 	 	81.73	% 	 	 	84.02	% 	 	 	(3	)% 
	 Silver recovery
	  	 	80.42	% 	 	 	78.18	% 	 	 	3	% 	 	 	77.84	% 	 	 	80.18	% 	 	 	(3	)% 
	 Gold recovery
	  	 	55.62	% 	 	 	40.04	% 	 	 	39	% 	 	 	50.55	% 	 	 	40.49	% 	 	 	25	% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Copper pounds (000’s)
	  	 	4,433	 	 	 	4,447	 	 	 	0	% 	 	 	17,109	 	 	 	17,629	 	 	 	(3	)% 
	 Silver ounces (000’s)
	  	 	98	 	 	 	103	 	 	 	(4	)% 	 	 	398	 	 	 	440	 	 	 	(10	)% 
	 Gold ounces
	  	 	801	 	 	 	833	 	 	 	(4	)% 	 	 	2,986	 	 	 	3,216	 	 	 	(7	)% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Silver equivalent ounces
(000’s)(1)
	  	 	825	 	 	 	834	 	 	 	(1	)% 	 	 	3,193	 	 	 	3,331	 	 	 	(4	)% 
	 Copper equivalent pounds
(000’s)(1)
	  	 	5,483	 	 	 	5,542	 	 	 	(1	)% 	 	 	21,230	 	 	 	22,147	 	 	 	(4	)% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 

  

	(1)	 Silver equivalent ounces & copper equivalent pounds were calculated using the following metal prices:
$14.96/oz Ag, $2.25/lb Cu, $0.75/lb Pb, $0.73/lb Zn, $1,113/oz Au. 

  
 26 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The Bolivar Mine processed 950,398 tonnes in 2016 representing another record for annual
throughput at the Mine and represented a 14% increase over 2015. Bolivar had a strong quarter of throughput in Q4 2016 with 245,000 tonnes processed which was a 16% increase compared to Q4 2015. The higher throughput and higher recoveries helped
offset the lower head grades encountered and resulted in just a 1% decrease in copper equivalent production in Q4 2016 compared to Q4 2015. 

Metals production at the Bolivar Mine decreased in 2016 with copper production 3% lower, silver production 10% lower and gold production 7%
lower when compared to 2015. In Q4 2016 Copper production was flat at 4.4 million pounds, silver production of 98,000 ounces decreased 4%, and gold production of 801 ounces decreased 4% compared to Q4 2015. The 1% decrease in metal production
was driven by the lower head grades for all metals and lower copper recoveries, despite the 16% increase in throughput. 
 The
Company’s focus at Bolivar in 2017 will be on improving production volume with higher throughput, and higher grades and recoveries by concentrating on the development and extraction of known mineralized areas within the Bolivar concessions.

 The Cusi Mine, Chihuahua 
 The
Company’s Cusi Mine encompasses 73 concessions covering 11,977 hectares that include 12 historical mines, each located on a mineralized structure, which lie within 40 kilometers of the Malpaso Plant located in Chihuahua State, Mexico. On
January 1, 2013 the Company announced that the Cusi Mine achieved commercial production. The Company has been successful in increasing the throughput at Cusi from 170 tpd during 2013 to 534 tpd during 2016. 

Mine development of the mineralized structures at the Promontorio and Santa Eduwiges Mines in Q4 2016 totaled 1,304 meters (440 meters of
ramps, 551 meters of drifts, and 43 meters of raises). As a result of this development, 37,832 tons of ore was produced with average head grades of: 0.14 g/t. Au; 188 g/t Ag; 1.01% Pb and 1.06% Zn. The veins mined in Q4 2016 in the Santa Eduwiges
Mine were: Moctezuma (level 11 and 13), San Nicolás (level 11 and 13), Veta B (level 13) and San Antonio (level 14). 
 At the
Promontorio Mine, ore was extracted from the following veins: Promontorio, Promontorio South, San Nicolas and El Gallo (level 2). 
 The San
Nicolás Vein has been one of the main veins which has been providing ore for production with head grades of 0.14 g/t Au, 186 g/t Ag, 0.48 % Pb y 0.53 % Zn. 

During Q4 2016, 4,750 meters of infill drilling was carried out inside the mine to verify the continuity of structures and assist in the
development of mining stopes of various veins. During Q4 2016 the Company drilled 3,817 meters from surface to explore the San Ignacio, San Rafael and Cusi Fault veins. 

The Company has begun producing a zinc concentrate from the Cusi Mine during 2016 as current and future block models have encountered ore
zones which contain significant zinc content which can be milled and turned into a zinc concentrate which will enhance future cash flows from the mine. 

  
 27 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Discovery of Significant High-Grade Zone at Cusi Silver Mine in Mexico 

On February 27, 2017 the Company announced the discovery of new high grade silver intercepts occurring in the Santa Rosa de Lima complex
located within the current Cusi Mine operational area. The Santa Rosa de Lima complex lies within a regional structure extending some 64 kilometers. Extension on the Cusi property has an anticipated length of 12 kilometers. The discovery comes as
part of a reinterpretation of the Hydrothermal model and a drilling campaign consisting of 15,000 meters which began in December 2016. To date, the Company has drilled 10,200 meters or about 79% of the planned program which is expected to be
completed by the end of March 2017. 
 The mineralization at the Santa Rosa de Lima structure is located 100 meters below the surface, and
can occasionally be observed at surface at the intersections of veins like “Promontorio” and “Santa Edwiges”. 
 San Nicolas Vein

 This is a structural vein on surface known longitudinally for approximately 1,300 metres with a general direction of Northwest 50
degrees Southeast. In the area of the Promontorio Mine the structure is identified on several levels and is believed to be an oxidized structure potentially containing economic material. In the area of the Santa Edwiges Mine the structure is also
identified on several levels with less oxidation and greater amounts of sulphides. Drilling is ongoing and drift development on this target has resulted in deliverable base metal contributions in zinc and lead sulphide mineralization to the Malpaso
mill plant. 
 San Ignacio Vein 
 The
San Ignacio structure is believed to be the continuation of the Promontorio vein on the footwall of the San Nicolas vein. The structure has a direction of Southwest 45 degrees to 80 degrees Northwest and extends up to 300 metres. This is one of the
least explored structures on the surface, along strike on the vein, where there was some small scale mining. The zone is open to depth and along strike. 

Moctezuma Vein 
 The Moctezuma vein is a
breccia of crustified quartz and bands of galena – sphalerite and nodules of galena, speckled with chalcopyrite and argentite. Drilling is ongoing and the mineralized zone is detected to be 75 meters in length with average thicknesses from 1.8
to 3.0 metres. The vein is related to the Monaco structure, which extends at least 250 metres in strike length. It is expected to have economic grades and represents strong mineral potential. 

San Antonio Vein 
 The San Antonio Vein
is described as a crustified quartz vein with bands of argentite and galena, in contact of the footwall with a breccia of massive sulphides composed of galena, sphalerite, argentite and presents sporadically disseminated chalcopyrite. Drilling is
ongoing and drifting on known zones is ongoing with the average width appearing to be 2.5 metres and the vein is recognized in vertical extent from surface to approximately 300 metres in depth. It is believed that there is potential at depth to
discover further mineralization. 

  
 28 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The discovery and evaluation to date of the Santa Rosa de Lima zone demonstrates very
important potential in our operations at the Cusi Mine. We hope in the short term to have a better understanding of the 12 kilometer structural extension containing the Santa Rosa de Lima zone. Intercepts such as those returned in Cusi-6, Cusi-14
and Cusi-509 are common in epithermal deposits of “bonanza” (High grade). 
 Cusi Production 

A summary of contained metal production from the Cusi Mine for the three and twelve months ended December 31, 2016 has been provided
below: 
  

																									
	 Cusi Production
	  	3 Months Ended	 	 	12 Months Ended	 
	 	  	Dec 31, 2016	 	 	Dec 31, 2015	 	 	% Var.	 	 	Dec 31, 2016	 	 	Dec 31, 2015	 	 	% Var.	 
	 Tonnes processed (mt)
	  	 	36,055	 	 	 	51,821	 	 	 	(30	)% 	 	 	186,898	 	 	 	202,033	 	 	 	(7	)% 
	 Daily throughput
	  	 	412	 	 	 	592	 	 	 	(30	)% 	 	 	534	 	 	 	577	 	 	 	(7	)% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Silver grade (g/t)
	  	 	172.70	 	 	 	175.20	 	 	 	(1	)% 	 	 	171.78	 	 	 	175.88	 	 	 	(2	)% 
	 Gold grade (g/t)
	  	 	0.23	 	 	 	0.29	 	 	 	(19	)% 	 	 	0.26	 	 	 	0.22	 	 	 	15	% 
	 Lead grade
	  	 	1.13	% 	 	 	1.19	% 	 	 	(5	)% 	 	 	1.21	% 	 	 	0.78	% 	 	 	56	% 
	 Zinc grade
	  	 	1.04	% 	 	 	0.00	% 	 	 	N.A.	 	 	 	1.16	% 	 	 	0.00	% 	 	 	N.A.	 
	 Silver recovery (flotation)
	  	 	70.04	% 	 	 	73.00	% 	 	 	(4	)% 	 	 	71.66	% 	 	 	76.46	% 	 	 	(6	)% 
	 Gold recovery (lixiviation)
	  	 	58.16	% 	 	 	67.91	% 	 	 	(14	)% 	 	 	61.82	% 	 	 	57.22	% 	 	 	8	% 
	 Lead recovery
	  	 	77.43	% 	 	 	81.10	% 	 	 	(5	)% 	 	 	82.24	% 	 	 	79.08	% 	 	 	4	% 
	 Zinc recovery
	  	 	31.86	% 	 	 	0.00	% 	 	 	N.A.	 	 	 	37.72	% 	 	 	0.00	% 	 	 	N.A.	 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Silver ounces (000’s)
	  	 	140	 	 	 	213	 	 	 	(34	)% 	 	 	740	 	 	 	873	 	 	 	(15	)% 
	 Gold ounces
	  	 	158	 	 	 	327	 	 	 	(52	)% 	 	 	954	 	 	 	831	 	 	 	15	% 
	 Lead pounds (000’s)
	  	 	695	 	 	 	1,106	 	 	 	(37	)% 	 	 	4,110	 	 	 	2,747	 	 	 	50	% 
	 Zinc pounds (000’s)
	  	 	263	 	 	 	0	 	 	 	N.A.	 	 	 	1,804	 	 	 	0	 	 	 	N.A.	 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Silver equivalent ounces
(000’s)(1)
	  	 	199	 	 	 	292	 	 	 	(32	)% 	 	 	1,103	 	 	 	1,070	 	 	 	3	% 
	 Copper equivalent pounds
(000’s)(1)
	  	 	1,324	 	 	 	1,940	 	 	 	(32	)% 	 	 	7,330	 	 	 	7,116	 	 	 	3	% 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 

  

	(1)	 Silver equivalent ounces & copper equivalent pounds were calculated using the following metal prices:
$14.96/oz Ag, $2.25/lb Cu, $0.75/lb Pb, $0.73/lb Zn, $1,113/oz Au. 

 Annual production at the Cusi mine was 186,898
tonnes which was 7% lower than 2015. Total ore processed of 36,055 tonnes during Q4 2016 decreased 30% compared to Q4 2015. Lower head grades and recoveries for all metals, combined with the lower throughput, resulted in a 32% decrease in metal
production during Q4 2016 compared to Q4 2015. 
 Silver production of 740,000 ounces in 2016 decreased 15%, however gold production at 954
ounces increased 15% and lead production at 4.1 million pounds increased 50% over 2015. The Cusi Mine also began the production of Zinc in 2016 with annual production of 1.8 million pounds for the year. In the Q4-2016 silver production of
140,000 ounces decreased 34%, gold production of 158 ounces decreased 52%, while lead production of 0.7 million pounds decreased 37% compared to Q4 2015. The Mine also produced 263,000 pounds of zinc which was the fourth quarter of zinc
production at Cusi. The lower throughput was the result of exceptionally poor weather encountered at Cusi during the last six months which caused flooding in various ramps within the mine which required additional pumping to be performed to de-water
the ramps and resulted in the Company not having access to as many production stopes during the quarter. 

  
 29 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Consolidated Mineral Resources 

 

																																																															
	 	 	 Reserves - Proven and Probable
	 	 	Contained Metal	 
	 	 	 	 	Tonnes
(x1000)	 	 	Ag
(g/t)	 	 	Cu
(%)	 	 	Pb
(%)	 	 	Zn
(%)	 	 	Au
(g/t)	 	 	AgEq
(g/t)	 	 	CuEq
(%)	 	 	Ag
(M oz)	 	 	Cu
(M lb)	 	 	Pb
(M lb)	 	 	Zn
(M lb)	 	 	Au
(M oz)	 	 	AgEq
(M oz)	 	 	CuEq
(M lb)	 
	 Yauricocha
	 	 Proven
	 	 	847	 	 	 	70.7	 	 	 	0.59	 	 	 	1.60	 	 	 	2.82	 	 	 	0.65	 	 	 	336	 	 	 	—  	 	 	 	1.9	 	 	 	10.9	 	 	 	29.8	 	 	 	52.6	 	 	 	17,735	 	 	 	9.2	 	 	 	—  	 
		 	 Probable
	 	 	2,940	 	 	 	58.4	 	 	 	0.91	 	 	 	1.02	 	 	 	2.95	 	 	 	0.62	 	 	 	329	 	 	 	—  	 	 	 	5.5	 	 	 	58.8	 	 	 	66.1	 	 	 	191.4	 	 	 	58,205	 	 	 	31.1	 	 	 	—  	 
		 	 Proven & Probable
	 	 	3,787	 	 	 	61.1	 	 	 	0.84	 	 	 	1.15	 	 	 	2.92	 	 	 	0.62	 	 	 	331	 	 	 	—  	 	 	 	7.4	 	 	 	69.7	 	 	 	95.9	 	 	 	244.0	 	 	 	75,940	 	 	 	40.3	 	 	 	—  	 
		 	  
	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Bolivar
	 	 Proven
	 	 	4,340	 	 	 	22.5	 	 	 	0.84	 	 	 	—  	 	 	 	0.19	 	 	 	0.22	 	 	 	—  	 	 	 	1.11	 	 	 	3.1	 	 	 	80.4	 	 	 	—  	 	 	 	18.2	 	 	 	31,115	 	 	 	—  	 	 	 	106.2	 
		 	 Probable
	 	 	3,117	 	 	 	15.4	 	 	 	0.65	 	 	 	—  	 	 	 	0.52	 	 	 	0.23	 	 	 	—  	 	 	 	0.95	 	 	 	1.5	 	 	 	44.7	 	 	 	—  	 	 	 	35.7	 	 	 	23,149	 	 	 	—  	 	 	 	65.3	 
		 	 Proven & Probable
	 	 	7,457	 	 	 	19.5	 	 	 	0.76	 	 	 	—  	 	 	 	0.33	 	 	 	0.23	 	 	 	—  	 	 	 	1.04	 	 	 	4.7	 	 	 	125.1	 	 	 	—  	 	 	 	53.9	 	 	 	54,264	 	 	 	—  	 	 	 	171.0	 
		 	  
	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Total
	 	 Proven & Probable
	 	 	11,244	 	 	 	33.5	 	 	 	0.79	 	 	 	N/A	 	 	 	1.20	 	 	 	0.36	 	 				 				 	 	12.1	 	 	 	194.8	 	 	 	95.9	 	 	 	297.9	 	 	 	130,204	 	 				 			
		 	  
	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
						
	 	 	 Resources - Measured and Indicated
	 	 	  
	 	 	  
	 	 	Contained Metal	 	 	  
	 
	 	 	 	 	Tonnes
(x1000)	 	 	Ag
(g/t)	 	 	Cu
(%)	 	 	Pb
(%)	 	 	Zn
(%)	 	 	Au
(g/t)	 	 	AgEq
(g/t)	 	 	CuEq
(%)	 	 	Ag
(M oz)	 	 	Cu
(M lb)	 	 	Pb
(M lb)	 	 	Zn
(M lb)	 	 	Au
(oz)	 	 	AgEq
(M oz)	 	 	CuEq
(M lb)	 
	 Yauricocha
	 	 Measured
	 	 	1,429	 	 	 	74.7	 	 	 	0.87	 	 	 	1.54	 	 	 	3.10	 	 	 	0.71	 	 	 	371	 	 	 	—  	 	 	 	3.4	 	 	 	27.4	 	 	 	48.6	 	 	 	97.7	 	 	 	32,703	 	 	 	17.0	 	 	 	—  	 
		 	 Indicated
	 	 	6,442	 	 	 	57.7	 	 	 	1.17	 	 	 	0.81	 	 	 	2.61	 	 	 	0.66	 	 	 	332	 	 	 	—  	 	 	 	12.0	 	 	 	166.8	 	 	 	115.1	 	 	 	370.7	 	 	 	137,189	 	 	 	68.7	 	 	 	—  	 
		 	 Measured & Indicated
	 	 	7,871	 	 	 	60.8	 	 	 	1.12	 	 	 	0.94	 	 	 	2.70	 	 	 	0.67	 	 	 	339	 	 	 	—  	 	 	 	15.4	 	 	 	194.2	 	 	 	163.7	 	 	 	468.4	 	 	 	169,892	 	 	 	85.7	 	 	 	—  	 
		 	  
	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Bolivar
	 	 Measured
	 	 	8,847	 	 	 	22.3	 	 	 	0.87	 	 	 	—  	 	 	 	0.98	 	 	 	0.20	 	 	 	—  	 	 	 	1.35	 	 	 	6.3	 	 	 	169.4	 	 	 	—  	 	 	 	190.9	 	 	 	49,600	 	 	 	—  	 	 	 	264.2	 
		 	 Indicated
	 	 	6,557	 	 	 	15.6	 	 	 	0.67	 	 	 	—  	 	 	 	1.05	 	 	 	0.20	 	 	 	—  	 	 	 	1.14	 	 	 	3.3	 	 	 	97.3	 	 	 	—  	 	 	 	151.4	 	 	 	30,800	 	 	 	—  	 	 	 	164.7	 
		 	 Measured & Indicated
	 	 	15,404	 	 	 	19.4	 	 	 	0.79	 	 	 	—  	 	 	 	1.01	 	 	 	0.20	 	 	 	—  	 	 	 	1.26	 	 	 	9.6	 	 	 	266.7	 	 	 	—  	 	 	 	342.2	 	 	 	80,400	 	 	 	—  	 	 	 	428.9	 
		 	  
	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Cusi
	 	 Indicated
	 	 	1,665	 	 	 	231.9	 	 	 	—  	 	 	 	0.46	 	 	 	0.46	 	 	 	0.08	 	 	 	—  	 	 	 	—  	 	 	 	12.4	 	 	 	—  	 	 	 	16.9	 	 	 	16.9	 	 	 	4,282	 	 	 	—  	 	 	 	—  	 
		 	  
	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Total
	 	 Measured & Indicated
	 	 	24,940	 	 	 	46.7	 	 	 	N/A	 	 	 	N/A	 	 	 	1.48	 	 	 	0.34	 	 				 				 	 	37.4	 	 	 	460.9	 	 	 	180.6	 	 	 	827.5	 	 	 	254,574	 	 				 			
		 	  
	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
			
	 	 	 Resources - Inferred
	 	 	Contained Metal	 
	 	 	 	 	Tonnes
(x1000)	 	 	Ag
(g/t)	 	 	Cu
(%)	 	 	Pb
(%)	 	 	Zn
(%)	 	 	Au
(g/t)	 	 	AgEq
(g/t)	 	 	CuEq
(%)	 	 	Ag
(M oz)	 	 	Cu
(M lb)	 	 	Pb
(M lb)	 	 	Zn
(M lb)	 	 	Au
  (oz)  	 	 	AgEq
(M oz)	 	 	CuEq
(M lb)	 
	 Yauricocha
	 		 	 	3,745	 	 	 	49.1	 	 	 	1.33	 	 	 	0.58	 	 	 	1.86	 	 	 	0.53	 	 	 	292	 	 	 	—  	 	 	 	5.9	 	 	 	110.2	 	 	 	48.0	 	 	 	153.7	 	 	 	64,299	 	 	 	35.1	 	 	 	—  	 
	 Bolivar
	 		 	 	6,164	 	 	 	18.1	 	 	 	0.73	 	 	 	—  	 	 	 	0.93	 	 	 	0.30	 	 	 	—  	 	 	 	1.17	 	 	 	3.6	 	 	 	99.8	 	 	 	—  	 	 	 	126.6	 	 	 	38,100	 	 	 	—  	 	 	 	158.4	 
	 Cusi
	 		 	 	2,737	 	 	 	227.5	 	 	 	—  	 	 	 	0.31	 	 	 	0.30	 	 	 	0.08	 	 	 	—  	 	 	 	—  	 	 	 	20.0	 	 	 	—  	 	 	 	18.7	 	 	 	18.1	 	 	 	7,039	 	 	 	—  	 	 	 	—  	 
		 		 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Total
	 	 Inferred
	 	 	12,646	 	 	 	72.6	 	 	 	N/A	 	 	 	N/A	 	 	 	1.07	 	 	 	0.32	 	 				 				 	 	29.5	 	 	 	210.0	 	 	 	66.7	 	 	 	298.4	 	 	 	109,438	 	 				 			
		 	  
	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 

 Notes: 

	1.	 The effective date of the mineral reserve and resource statement for the Yauricocha Mine including Mina
Central, Cachi-Cachi, Mascota and Cuerpos mineral reserve and resource estimate is Dec 31, 2015. The effective date for Esperanza is June 30, 2016. Details of the estimate are provided in the Company’s August 11, 2016 press release.
An NI 43-101 compliant technical report to support the estimate was filed on SEDAR on September 12, 2016. Measured and Indicated Resources include Proven and Probable Reserves. Silver equivalent is based on the following metal prices:
US$16.76/oz Ag, US$2.28/lb Cu, US$0.86/lb Pb and US$0.94 Zn and US$1,251/oz Au. 

	2.	 The effective date of the Bolivar mineral reserve and resource estimate is Dec 31, 2012. Details of the
estimate are provided in the Company’s Aug 30, 2012 and Apr 17, 2013 press releases and within a NI 43-101 compliant technical report filed on SEDAR on May 31, 2013. Measured and Indicated Resources include Proven and Probable Reserves.
Copper equivalent is based on the following metal prices: US$26.28/oz Ag, US$3.56 Cu and US$0.96 Zn. 

	3.	 The effective date of the Cusi mineral resource estimate is Dec 31, 2013. Details of the estimate are provided
in the Company’s Mar 27, 2014 press release and within a NI 43-101 compliant technical report filed on SEDAR on May 9, 2014. 

	4.	 Mineral resources that are not mineral reserves do not have demonstrated economic viability.

  
 30 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 6. SUMMARIZED FINANCIAL RESULTS 

Year ended December 31, 2016 (compared to the year ended December 31, 2015) 

 

													
	 	  	Year ended	 
	(In thousands of United States dollars, except cash costs)	  	Dec 31, 2016	 	  	Dec 31, 2015	 	  	Dec 31, 2014	 
	 Revenue
	  	$	143,180	 	  	$	134,052	 	  	$	172,614	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Adjusted EBITDA 1
	  	 	41,887	 	  	 	32,317	 	  	 	72,597	 
	 Cash flow from operations before movements in working capital
	  	 	44,303	 	  	 	32,475	 	  	 	71,276	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Adjusted net income attributable to shareholders
	  	 	7,006	 	  	 	4,108	 	  	 	30,496	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Non-cash charge on the acquisition of Corona
	  	 	24,384	 	  	 	27,562	 	  	 	33,874	 
	 Gross profit (loss)
	  	 	16,780	 	  	 	7,331	 	  	 	49,019	 
	 Income tax recovery (expense)
	  	 	(5,757	) 	  	 	2,823	 	  	 	(2,723	) 
	 Net income (loss) attributable to shareholders
	  	 	(12,265	) 	  	 	(33,302	) 	  	 	9,300	 
				
	(In thousands of United States dollars)	  	Dec 31, 2016	 	  	Dec 31, 2015	 	  	Dec 31, 2013	 
	 Cash and cash equivalents
	  	$	42,145	 	  	$	25,102	 	  	$	41,273	 
	 Assets
	  	 	364,812	 	  	 	368,525	 	  	 	424,453	 
	 Liabilities
	  	 	178,850	 	  	 	170,951	 	  	 	189,960	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Net Debt 2
	  	 	36,537	 	  	 	50,984	 	  	 	40,603	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Equity
	  	 	185,962	 	  	 	197,574	 	  	 	234,493	 

  

	1	 This is a non-IFRS performance measure, see Non-IFRS
Performance Measures section 

	2 	 Loans payable minus cash and cash equivalents. 

Net income (loss) attributable to shareholders for the year ended December 31, 2016 was $(12.3) million (2015: $(33.3) million) or
$(0.08) per share (basic and diluted) (2015: $(0.21)). The major differences between these periods are explained below. The 2015 net loss of $33.3 million included a $19.0 million impairment loss allocated against capitalized exploration and
evaluation expenditures on the Cusi Mine. 
 Revenues 

Revenue from metals payable from the Yauricocha Mine in Peru were $97.3 million for the year ended December 31, 2016 compared to $80.1
million for the same period in 2015. The increase in revenue was due to the increases in the price of silver (9%), lead (2%), zinc (10%), and gold (9%), the 8% increase in throughput, and the increase in copper and zinc head grades during 2016
compared 2015. The Company achieved record production during Q3 2016, and the third highest quarter of production during Q4 2016, as the operational improvement program and the focus on extracting higher value ore have positively impacted the
revenues during the last three quarters. 
 Revenue from metals payable in Mexico were $45.9 million for the year ended December 31,
2016, compared to $53.9 million for the same period in 2015. Revenues in Mexico decreased as a result of the decline in copper (11%) price during 2016 compared 2015. Also, there has been a decrease in head grades and recoveries of all metals,
except gold recoveries, at the Bolivar Mine, and lower throughput and silver head grades and recoveries at Cusi, which was partially offset by the increase in plant throughput at Bolivar (14%), and the increase in gold and lead head grades and
recoveries at the Cusi Mine. Another reason for the decrease in revenues in Mexico was 

  
 31 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
because the Company received a payment of $4.9 million in December 2016 for Bolivar copper concentrate stockpiled at the Piedras Verdes Plant which was awaiting a new filter in order to further
process and dry the concentrate. The $4.9 million payment has been recorded as deferred revenue and the concentrate will be recognized as revenue during January – April 2017 as it is shipped. 

Revenue from metals payable at the Bolivar Mine were $33.3 million for the year ended December 31, 2016 compared to $41.8 million
for the same period in 2015. The decrease in revenue from the Bolivar Mine was due to the 11% decrease in the price of copper realized in 2016 compared to 2015, as well as the decrease in head grades and recoveries of all metals, except gold
recoveries. This was partially offset by the 14% increase in plant throughput. 
 Revenues generated at the Cusi Mine for the year ended
December 31, 2016 were $12.6 million compared to $12.1 million for the same period in 2015. The increase in revenues was mainly due to the newly produced zinc concentrate that the Company began shipping during Q2 2016, as well as the dramatic
increase in lead (56%) and gold (15%) head grades and lead (4%) and gold (8%) recoveries that contributed to record annual silver equivalent ounce production at Cusi during 2016. 

The following table shows the Company’s realized selling prices for each quarter in 2016 and 2015: 

 

																																									
	Realized Metal Prices	  	2016	 	  	2015	 
	(In US dollars)	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 	  	YTD	 	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 	  	YTD	 
	 Silver (oz)
	  	$	16.82	 	  	$	19.17	 	  	$	17.08	 	  	$	15.26	 	  	$	17.16	 	  	$	14.76	 	  	$	14.64	 	  	$	16.28	 	  	$	16.78	 	  	$	15.78	 
	 Copper (lb)
	  	$	2.38	 	  	$	2.16	 	  	$	2.15	 	  	$	2.13	 	  	$	2.23	 	  	$	2.19	 	  	$	2.38	 	  	$	2.75	 	  	$	2.63	 	  	$	2.51	 
	 Lead (lb)
	  	$	0.95	 	  	$	0.85	 	  	$	0.79	 	  	$	0.80	 	  	$	0.84	 	  	$	0.77	 	  	$	0.77	 	  	$	0.89	 	  	$	0.81	 	  	$	0.82	 
	 Zinc (lb)
	  	$	1.16	 	  	$	1.02	 	  	$	0.86	 	  	$	0.77	 	  	$	0.98	 	  	$	0.73	 	  	$	0.82	 	  	$	0.99	 	  	$	0.95	 	  	$	0.89	 
	 Gold (oz)
	  	$	1,210	 	  	$	1,347	 	  	$	1,246	 	  	$	1,212	 	  	$	1,267	 	  	$	1,096	 	  	$	1,101	 	  	$	1,180	 	  	$	1,224	 	  	$	1,161	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 Yauricocha’s cost of sales per silver equivalent payable ounce was $8.10 (2015 - $7.32), cash cost per
silver equivalent payable ounce was $7.77 (2015 - $7.10), and all-in sustaining cash cost (“AISC”) per silver equivalent payable ounce was $13.11 (2015 - $13.25) for the year ended December 31, 2016 compared to the same period in
2015. The decrease in the annual AISC per silver equivalent payable ounce during 2016 was due to more silver equivalent payable ounces being produced and sold as a result of higher throughput and ore feed head grades from the increase in available
production from higher grade zones in the Mine. Also, lower treatment and refining costs incurred during 2016 resulting from improvements within re-negotiated sales contracts with our smelters offset some of the additional sustaining capital costs
and costs related to the mechanization and water management controls implemented at the Mine during 2016. 
 Bolivar’s cost of sales
per copper equivalent payable pound was $1.35 (2015 - $1.39), cash cost per copper equivalent payable pound was $1.15 (2015 - $1.33) and AISC per copper equivalent payable pound was $2.28 (2015 - $2.29) for the year ended December 31, 2016
compared to the same period in 2015. The annual AISC per copper equivalent payable pound remained consistent during 2016 the decrease in cash costs offset an increase of $2.2M in sustaining capital expenditures related to mine development and
equipment purchases; as well as a decrease in copper equivalent pounds sold which was due to the lower head grades and recoveries of all metals, except gold recoveries. 

  
 32 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Cusi’s cost of sales per silver equivalent payable ounce was $6.00 (2015 – 7.15),
cash cost per silver equivalent payable ounce was $10.28 (2015 - $8.82) and AISC per silver equivalent payable ounce was $20.41 (2015 - $26.47) for the year ended December 31, 2016 compared to the same period in 2015. Annual AISC per silver
equivalent payable ounce decreased due to the significant decrease of $8.5M in sustaining capital expenditures related to stope and drift development within the mine during 2016 as a significant amount of mine development work was completed during
the last two years which has resulted in reduced sustaining capital costs required to drift and develop the necessary amount of mining faces required to maintain current production levels. The decline in throughput and silver head grades and
recoveries resulted in fewer silver equivalent payable ounces which also contributed to the higher annual cash cost per silver equivalent payable ounce in 2016 compared to 2015. 

Non-cash depletion, depreciation and amortization 

The Company recorded total non-cash depletion, depreciation and amortization expense for the year ended December 31, 2016 of $45.7
million compared to $46.8 million for the same period in 2015. 
 A large component of the non-cash depletion, depreciation and amortization
expense is the depletion charge on the acquisition of Corona of $24.4 million for the year ended December 31, 2016 compared to $27.6 million for the same period in 2015. This non-cash charge is recognized in depletion, depreciation and
amortization, a component of cost of sales, as inventory is sold. Changes in this charge are associated with variations in inventory levels captured in the change in working capital and changes in reserves and resources. The decrease in non-cash
depletion charge year over year is mainly the result of the increase in the proven and probable reserves per the NI 43-101 technical reports released previously. 

General and Administrative Expenses 
 The
Company incurred general and administrative expenses of $14.9 million for the year ended December 31, 2016 compared to $13.9 million for the same period in 2015. The increase in general and administrative costs in 2016 compared to the same
period in 2015 was due to an increase in legal fees incurred in Canada with regards to the work being performed towards listing Sierra Metals Inc on the NYSE MKT stock exchange, as well as the proposed spin-out of the Northern Peruvian Properties
within the Company’s Plexmar Resources subsidiary. 
 Adjusted EBITDA (1) 

The Company recorded adjusted EBITDA of $41.9 million during the year ended December 31, 2016 (2015: $32.3 million) which was comprised
of $34.3 million (2015: $24.9 million) from the Peruvian operations and $11.6 million (2015: $9.7 million) from the operations in Mexico. The increase in adjusted EBITDA is due to the increase in revenues discussed previously. Adjusted EBITDA is a
non-IFRS measure that represents an indication of the Company’s continuing capacity to generate earnings from operations before taking into account management’s financing decisions and costs of consuming capital assets, which vary
according to their vintage, technological currency, and management’s estimate of their useful life. Adjusted EBITDA comprises revenue less operating expenses before interest expense (income), property, plant and equipment amortization and
depletion, and income taxes. The Company considers cash flow before movements in working capital to be the IFRS performance measure that is most closely comparable to adjusted EBITDA. 

  
 33 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Income taxes 

The Company recorded current tax expense of $9.6 million for the year ended December 31, 2016 compared to $6.8 million for the same
period in 2015. The increase was the result of the higher taxable income generated in Peru during 2016 compared to 2015. 
 During the year
ended December 31, 2016, the Company recorded a deferred tax recovery of $3.9 million compared to $9.7 million in the same period in 2015. The main driver for the Company’s consolidated deferred tax recovery is the non-cash recovery
associated with the acquisition of Corona which has decreased year over year in line with the non-cash depletion charge mentioned previously. Also, the Company recorded a deferred tax expense of $1.0 million in Mexico during 2015 due to the taxable
income earned in Mexico and concurrent reduction of non-capital losses included within the Mexican deferred tax assets. The decrease in the deferred tax recovery was also due to a foreign exchange loss on the conversion of Mexican peso denominated
deferred tax asset into the US dollar functional currency of the Company. The peso weakened significantly compared to the US dollar during 2016 which caused a foreign exchange loss on the translation of non-monetary tax assets from pesos into the US
dollar functional currency. 
 Adjusted net income attributable to shareholders (1) 
 The Company recorded an
adjusted net income of $7.0 million for the year ended December 31, 2016 compared to adjusted net income of $4.1 million for the same period in 2015. The increase resulted from the increase in revenues at the Yauricocha and Cusi mines. Adjusted
net income is defined by management as the net income attributable to shareholders shown in the condensed interim consolidated statements of income excluding the non-cash depletion charge due to the acquisition of Corona, the corresponding deferred
income tax recovery, and certain non-recurring or non-cash items. Accordingly, management considers this metric to be more meaningful to measure the Company’s profitability than net income as it adjusts for specific non-cash items. 

Other Comprehensive Income (Loss) 
 Other
comprehensive loss (“OCL”) for the year ended December 31, 2016 was $(11.9) million compared to OCL of $(37.3) million for the same period in 2015. OCL includes a foreign currency gain of $0.8 million for 2016 (2015: $(2.0) million
loss). The unrealized foreign currency translation gain was caused by the strengthening of the Canadian dollar relative to the US dollar during the period which resulted in a foreign exchange gain on the translation of the Canadian dollar net assets
into the Company’s US dollar presentation currency. 
  

	(1) 	 This is a non-IFRS performance measure, see non-IFRS Performance Measures section of this MD&A.

  
 34 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The following tables display selected annual financial results detailed by operating segment: 

 

																					
	 	  	Peru	 	 	Mexico	 	 	Mexico	 	 	Canada	 	 	 	 
	 	  	Yauricocha Mine	 	 	Bolivar Mine	 	 	Cusi Mine	 	 	Corporate	 	 	Total	 
	Year ended December 31, 2016	  	$	 	 	$	 	 	  
	 	 	$	 	 	$	 
	 Revenue
	  	 	97,290	 	 	 	33,267	 	 	 	12,623	 	 	 	—  	 	 	 	143,180	 
	 Production cost of sales
	  	 	(53,705	) 	 	 	(23,064	) 	 	 	(5,063	) 	 	 	—  	 	 	 	(81,832	) 
	 Depletion of mineral property
	  	 	(24,384	) 	 	 	(3,426	) 	 	 	(752	) 	 	 	—  	 	 	 	(28,562	) 
	 Depreciation and amortization of property, plant and equipment
	  	 	(7,812	) 	 	 	(6,719	) 	 	 	(1,475	) 	 	 	—  	 	 	 	(16,006	) 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Cost of sales
	  	 	(85,901	) 	 	 	(33,209	) 	 	 	(7,290	) 	 	 	—  	 	 	 	(126,400	) 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Gross profit from mining operations
	  	 	11,389	 	 	 	58	 	 	 	5,333	 	 	 	—  	 	 	 	16,780	 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Net income (loss) from operations
	  	 	(5,250	) 	 	 	(6,853	) 	 	 	3,306	 	 	 	(3,924	) 	 	 	(12,721	) 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Adjusted EBITDA
	  	 	34,264	 	 	 	5,120	 	 	 	6,445	 	 	 	(3,942	) 	 	 	41,887	 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
						
	 	  	Peru	 	 	Mexico	 	 	Mexico	 	 	Canada	 	 	 	 
	 	  	Yauricocha Mine	 	 	Bolivar Mine	 	 	Cusi Mine	 	 	Corporate	 	 	Total	 
	Year ended December 31, 2015	  	$	 	 	$	 	 	  
	 	 	$	 	 	$	 
	 Revenue
	  	 	80,113	 	 	 	41,839	 	 	 	12,100	 	 	 	—  	 	 	 	134,052	 
	 Production cost of sales
	  	 	(45,940	) 	 	 	(27,238	) 	 	 	(6,810	) 	 	 	—  	 	 	 	(79,988	) 
	 Depletion of mineral property
	  	 	(27,561	) 	 	 	(4,317	) 	 	 	(589	) 	 	 	—  	 	 	 	(32,467	) 
	 Depreciation and amortization of property, plant and equipment
	  	 	(6,793	) 	 	 	(5,978	) 	 	 	(1,495	) 	 	 	—  	 	 	 	(14,266	) 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Cost of sales
	  	 	(80,294	) 	 	 	(37,533	) 	 	 	(8,894	) 	 	 	—  	 	 	 	(126,721	) 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Gross profit (loss) from mining operations
	  	 	(181	) 	 	 	4,306	 	 	 	3,206	 	 	 	—  	 	 	 	7,331	 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Net income (loss) from operations
	  	 	(13,910	) 	 	 	(3,286	) 	 	 	(15,177	) 	 	 	(929	) 	 	 	(33,302	) 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Adjusted EBITDA
	  	 	24,905	 	 	 	4,228	 	 	 	5,450	 	 	 	(255	) 	 	 	34,328	 
		  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 

 Cash Flows 

Cash flow from operating activities before movements in working capital of $44.3 million for the year ended December 31, 2016 increased
from $32.5 million in the same period of 2015. The increase was due to the increase in revenues and operating margins previously discussed. 

Net cash flow of $(25.4) million (2015: $(37.6) million) used in investing activities for the year ended December 31, 2016 consists of
purchases of property, plant and equipment, capital expenditures related to the Yauricocha shaft and tunnel development, and exploration and evaluation assets in Peru and Mexico. 

  
 35 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 A breakdown of the Company’s capital expenditures of $25.4 million during the year ended
December 31, 2016 is presented below: 
  

																	
	 2016 Capital Expenditures by Mine
	 
	($ Millions)	  	Yauricocha	 	  	Bolivar	 	  	Cusi	 	  	Total	 
	 Expenditure
	  				  				  				  			
	 Esperanza development and infill drilling
	  	$	2.10	 	  	$	—  	 	  	$	—  	 	  	$	2.10	 
	 Mine Development
	  	$	0.80	 	  	$	3.70	 	  	$	3.40	 	  	$	7.90	 
	 Shafts
	  	$	2.50	 	  	$	—  	 	  	$	0.50	 	  	$	3.00	 
	 Tunnel
	  	$	1.00	 	  	$	—  	 	  	$	—  	 	  	$	1.00	 
	 Equipment
	  	$	3.30	 	  	$	2.50	 	  	$	0.40	 	  	$	6.20	 
	 Tailings Dam
	  	$	0.30	 	  	$	0.10	 	  	$	—  	 	  	$	0.40	 
	 Increase Mill Capacity/maintenance
	  	$	0.30	 	  	$	1.00	 	  	$	0.30	 	  	$	1.60	 
	 Mine Exploration
	  	$	0.60	 	  	$	0.20	 	  	$	0.30	 	  	$	1.10	 
	 Mining Concession Fees
	  	$	0.70	 	  	$	0.70	 	  	$	0.70	 	  	$	2.10	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		  	$	11.60	 	  	$	8.20	 	  	$	5.60	 	  	$	25.40	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 Net cash flow of $(1.0) million (2015: $(9.2) million) from (used in) financing activities for the year ended
December 31, 2016 consists of $(9.5) million (2015: $(12.9) million) in repayments of loans and credit facilities, $(3.7) million (2015: $(3.4) million) in interest paid on loans and credit facilities, and $(0.5) million (2015: $(0.9) million)
of dividends paid to non-controlling interest shareholders. This was partially offset by proceeds received from the issuance of credit facilities of $12.8 million in 2016 (2015: $8.0 million). 

7. QUARTERLY FINANCIAL REVIEW 

The following table displays selected results from the eight most recent quarters: 
  

																																	
	(In thousands of United States dollars, except per share amounts)	  	2016	 	 	2015	 
	 	  	Dec-31	 	 	Sep-30	 	  	Jun-30	 	 	Mar-31	 	 	Dec-31	 	 	Sep-30	 	 	Jun-30	 	  	Mar-31	 
	 Revenues
	  	 	41,825	 	 	 	40,757	 	  	 	36,858	 	 	 	23,740	 	 	 	25,024	 	 	 	28,421	 	 	 	45,867	 	  	 	34,740	 
	 Adjusted EBITDA
	  	 	15,985	 	 	 	16,264	 	  	 	5,265	 	 	 	4,373	 	 	 	(1,935	) 	 	 	2,013	 	 	 	18,249	 	  	 	13,990	 
	 Adjusted net income (loss) attributable to shareholders
	  	 	3,516	 	 	 	5,003	 	  	 	454	 	 	 	(1,967	) 	 	 	(3,599	) 	 	 	(3,646	) 	 	 	7,274	 	  	 	4,079	 
	 Net income (loss) attributable to shareholders
	  	 	(5,076	) 	 	 	1,367	 	  	 	(3,440	) 	 	 	(5,116	) 	 	 	(27,083	) 	 	 	(6,761	) 	 	 	1,209	 	  	 	(667	) 
	 Basic and diluted earnings (loss) per share ($)
	  	 	(0.04	) 	 	 	0.01	 	  	 	(0.02	) 	 	 	(0.03	) 	 	 	(0.17	) 	 	 	(0.04	) 	 	 	0.00	 	  	 	0.00	 
		  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	  	  
	  
	 

 Three months ended December 31, 2016 (compared to the three months ended December 31, 2015) 

Net income (loss) attributable to shareholders for Q4 2016 was $(5.1) million, or $(0.04) per share (basic and diluted), compared to a net
loss of $(27.1) million, or $(0.17) per share (basic and diluted) for the same period in 2015. The major differences between these periods are explained below. The Q4 2015 net loss of $27.1 million included a $19.0 million impairment loss allocated
against capitalized exploration and evaluation expenditures on the Cusi Mine. 
 Revenues 

Revenue from metals payable from the Yauricocha Mine in Peru were $31.8 million for Q4 2016 compared to $12.8 million for the same period in
2015. Higher revenues are primarily attributable to the 22% increase in throughput, the increase in silver, copper and zinc head grades, the increase in recoveries of all metals, except gold, and the increase in the prices of silver (14%), copper
(9%), lead (23%), zinc (59%), and gold (10%) in Q4 2016 compared to Q4 2015. 

  
 36 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Revenue from metals payable in Mexico were $9.9 million for Q4 2016, compared to $12.8
million for the same period in 2015. Revenues in Mexico decreased as a result of the lower head grades for all metals, at Bolivar, and lower throughput and silver head grades and recoveries at Cusi. This was partially offset by the higher throughput
and higher recoveries for all metals at Bolivar. Another reason for the decrease in revenues in Mexico was because the Company received a payment of $4.9 million in December 2016 for Bolivar copper concentrate stockpiled at the Piedras Verdes Plant
which was awaiting a new filter in order to further process and dry the concentrate. The $4.9 million payment has been recorded as deferred revenue and the concentrate will be recognized as revenue during January – April 2017 as it is shipped.

 Revenues generated at the Bolivar Mine for Q4 2016 were $7.2 million, compared to $10.0 million for the same period in 2015. At Bolivar,
the Company realized a 16% increase in throughput as well as higher silver and gold recoveries, which was partially offset by lower head grades for all metals during Q4 2016 compared to Q4 2015. The main reason for the decline in revenues was the
$4.9 million of deferred revenue not realized during 2016 discussed previously. 
 Revenues generated at the Cusi Mine for Q4 2016 were
$2.7 million compared to $2.8 million for Q4 2015. Revenues remained consistent during Q4 2016 compared to Q4 2015 due to the introduction of a zinc concentrate being produced from Cusi during 2016, and the increase in prices of all metals, which
helped mitigate the 30% decrease in throughput and the decrease in head grades and recoveries of all metals realized during Q4 2016 compared to Q4 2015. 

Yauricocha’s cost of sales per silver equivalent payable ounce was $7.73 (2015 - $9.74), cash cost per silver equivalent payable ounce
was $7.29 (Q4 2015 - $9.89), and all-in sustaining cash cost (“AISC”) per silver equivalent payable ounce was $12.51 (Q4 2015 - $17.15) for Q4 2016 compared to Q4 2015. The decrease in AISC
per silver equivalent payable ounce during Q4 2016 was due to the increase in throughput, head grades, and recoveries which resulted in the increase in silver equivalent payable ounces; cash costs and AISC’s have remained consistent, quarter
over quarter, however the increase in equivalent metal production has reduced the cost metrics at Yauricocha. 
 Bolivar’s cost of
sales per copper equivalent payable pound was $1.52 (2015 – $1.52), cash cost per copper equivalent payable pound was $1.05 (Q4 2015 - $1.43), and AISC per copper equivalent payable pound was $2.71 (Q4 2015 - $2.37) for Q4 2016 compared to Q4
2015. The increase in AISC per copper equivalent payable pound during Q4 2016 was mainly due to the $2.7 million increase in sustaining capital expenditures related to mine development and equipment purchases; as well as the decrease in copper
equivalent payable pounds from the decrease in head grades and recoveries during Q4 2016. 
 Cusi’s cost of sales per silver equivalent
payable ounce was $9.44 (2015 – $6.00), cash cost per silver equivalent payable ounce was $21.80 (Q4 2015 - $12.02) and AISC per silver equivalent payable ounce was $41.32 (Q4 2015 - $21.84) for Q4 2016 compared to Q4 2015. AISC per silver
equivalent payable ounce increased due to lower throughput, head grades and recoveries for all metals which resulted in a significant decline in silver equivalent payable ounces. The lower throughput was the result of exceptionally poor weather
encountered at Cusi during the last six months which caused flooding in various ramps within the mine which required additional pumping to be performed to de-water the ramps and resulted in the Company not having access to as many production stopes
during the quarter. 

  
 37 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Non-cash depletion, depreciation and amortization 

The Company recorded total non-cash depletion, depreciation and amortization expense for Q4 2016 of $15.3 million compared to $11.4 million
for the same period in 2015. 
 A large component of the non-cash depletion, depreciation and amortization expense is the depletion charge
on the acquisition of Corona of $8.4 million for Q4 2016 compared to $5.8 million for the same period in 2015. This non-cash charge is recognized in depletion, depreciation and amortization, a component of cost of sales, as inventory is sold.
Changes in this charge are associated with variations in inventory levels captured in the change in working capital and changes in reserves and resources. The decrease in non-cash depletion charge year over year is mainly the result of the increase
in the proven and probable reserves and resources per the NI 43-101 technical reports released previously. 
 General and Administrative Expenses

 The Company incurred general and administrative expenses of $4.7 million for Q4 2016 compared to $3.4 million for Q3 2015. The
increase in general and administrative costs in Q3 2016 compared to the same period in 2015 was due to an increase in legal fees incurred in Canada with regards to the work being performed towards listing Sierra Metals Inc on the NYSE MKT stock
exchange, as well as the proposed spin-out of the Northern Peruvian Properties within the Company’s Plexmar Resources subsidiary. 
 Adjusted EBITDA

 The Company recorded adjusted EBITDA of $16.0 million during Q4 2016 (Q4 2015: $(1.9) million) which was comprised of
$14.5 million (Q4 2015: $(3.2) million) from the Peruvian operations and $2.5 million (Q4 2015: $1.5 million) from the operations in Mexico. The increase in adjusted EBITDA is due to the increase in revenues discussed previously. The Company
considers cash flow before movements in working capital to be the IFRS performance measure that is most closely comparable to adjusted EBITDA. 
 Income
taxes 
 The Company recorded current tax expense of $4.6 million for Q4 2016 compared to a $(1.0) million current tax recovery in Q4
2015 and the increase was the result of the higher taxable income generated in Peru during Q4 2016 compared to Q4 2015. 
 During Q4 2016,
the Company recorded a deferred tax expense of $1.8 million compared to a deferred tax recovery of $5.4 million in Q4 2015. The main driver for the Company’s consolidated deferred tax recovery is the non-cash recovery associated with the
acquisition of Corona which has decreased year over year in line with the non-cash depletion charge mentioned previously. The decrease in the deferred tax recovery was also due to a foreign exchange loss on the conversion of Mexican peso denominated
deferred tax asset into the US dollar functional currency of the Company. The peso weakened significantly compared to the US dollar during 2016 which caused a foreign exchange loss on the translation of non-monetary tax assets from pesos into the US
dollar functional currency. 

  
 38 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Adjusted net income (loss) attributable to shareholders 

The Company recorded an adjusted net income of $3.5 million for Q4 2016 compared to an adjusted net loss of $(3.6) million for Q4 2015 and the
increase resulted from the higher revenues realized during the period. Adjusted net income (loss) is defined by management as the net income (loss) attributable to shareholders shown in the consolidated statements of income excluding the non-cash
depletion charge due to the acquisition of Corona, the corresponding deferred income tax recovery, and certain non-recurring or non-cash items. Accordingly, management considers this metric to be more meaningful to measure the Company’s
profitability than net income (loss) as it adjusts for specific non-cash items. 
 Other Comprehensive Income (Loss) 

OCL for Q4 2016 was $(5.6) million compared to OCL of $(28.5) million for the same period in 2015. OCL includes a foreign currency loss of
$(0.4) million in Q4 2016 (Q4 2015: $0.1 million). The unrealized foreign currency translation loss was caused by the weakening of the Canadian dollar relative to the US dollar during the quarter, which resulted in a foreign exchange loss on the
translation of the Canadian dollar net assets into the Company’s US dollar presentation currency. 
 8. LIQUIDITY AND
CAPITAL RESOURCES 
 Financial Condition Review 

The following table provides a comparison of key elements of Sierra’s balance sheet as at December 31, 2016 and December 31,
2015: 
  

									
	(000’s)	  	December 31,
2016	 	  	December 31,
2015	 
	 Cash and cash equivalents
	  	$	42,145	 	  	$	25,102	 
	 Working capital
	  	$	9,576	 	  	$	13,581	 
	 Total assets
	  	$	364,812	 	  	$	368,525	 
		  	  
	  
	 	  	  
	  
	 
	 Debt (net of financing fees)
	  	$	78,760	 	  	$	76,086	 
	 Total liabilities
	  	$	178,850	 	  	$	170,951	 
		  	  
	  
	 	  	  
	  
	 
	 Equity attributable to owners of the Company
	  	$	160,268	 	  	$	170,929	 
		  	  
	  
	 	  	  
	  
	 

 Cash and cash equivalents of $42.1 million and working capital of $9.6 million as at December 31, 2016
compared to $25.1 million and $13.6 million, respectively, at the end of 2015. Cash and cash equivalents have increased by $17.0 million during the year ended December 31, 2016 due to $43.6 million of operating cash flows, and proceeds from the
issuance of credit facilities of $12.8 million. This was partially offset by capital expenditures incurred in Mexico and Peru of $(25.4) million, repayment of loans, credit facilities and interest of $(13.2) million, and dividends

  
 39 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
paid to non-controlling interest shareholders of $(0.5) million. Included in the $43.6 million of operating cash flows were negative changes in non-cash working capital items of $1.5 million due
to the increase accounts receivable and inventory as at December 31, 2016. 
 Trade and other receivables includes $3.8 million
(December 31, 2015 - $5.9 million) of Mexican value-added tax (“VAT”) receivables. During 2014, the Company commenced the process to request the refund of the VAT receivable relating to 2012 and 2013 and has successfully received refunds
of $10.5 million for some of the monthly claims submitted over the past two years. The Company expects to collect or offset the VAT balance against 2016 or 2017 VAT payables. Amounts included in trade and other receivables are current and the
Company has no allowance for doubtful accounts as at December 31, 2016. 
 Sierra’s outstanding loan and credit facilities are shown below: 

 

													
	 	  	Balance Outstanding	 
	(000’s)	  	Limit	 	  	December 31,
2016	 	  	December 31,
2015	 
	 Dia Bras Peru loan with BCP (Corona Acquisitio
	  	$	—  	 	  	$	45,820	 	  	$	47,019	 
	 Corona loan with BCP (Corona Operating)(2)
	  	$	15,000	 	  	$	12,449	 	  	$	11,087	 
	 Corona Notes payable to Scotiabank Peru(3)
	  	$	15,000	 	  	$	14,750	 	  	$	11,000	 
	 Pre-export finance facility with Metagri S.A. de
	  	$	4,000	 	  	$	1,179	 	  	$	—  	 
	 FIFOMI working capital facility
	  	$	7,543	 	  	$	4,484	 	  	$	6,980	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total Debt
	  				  	$	78,682	 	  	$	76,086	 
	 Less cash balances (including restricted cash)
	  				  	$	42,145	 	  	$	25,102	 
		  				  	  
	  
	 	  	  
	  
	 
	 Net Debt
	  				  	$	36,537	 	  	$	50,984	 
		  				  	  
	  
	 	  	  
	  
	 

 (1 – 4) See consolidated financial statements as at
December 31, 2016 for details of each loan and credit facility. 
 Refinancing of Credit Facility 

The remaining $48 million due on the Corona Acquisition Facility (“the Facility”) with Banco de Credito del Peru was refinanced in
August 7, 2015. 
 The most significant amendments to the Facility were as follows: 

The remaining $48 million on the Facility was split into two tranches: 

	 	•	 	 Tranche 1, in the amount of $24 million has quarterly principal repayments of $1.5 million beginning in
November 2016 and ending in August 2020; 

	 	•	 	 Tranche 2, in the amount of $24 million, has no quarterly principal repayments and to be repaid in full in
August 2020; 

	 	•	 	 One year principal repayment grace period; 

	 	•	 	 Reduced interest rate equal to 3.65% plus 3M LIBOR vs previous rate of 4.15% plus 3M LIBOR; and

	 	•	 	 Term of the Facility extended for five years. 

This was a very successful refinancing for the Company, where interest costs were reduced, and almost $20 million of debt principal repayments
were no longer due for the remainder of 2015 and 2016. Additionally, quarterly principal repayments thereafter have been reduced from $3.4 million to $1.5 million. The new Facility provides the Company with increased financial flexibility during

  
 40 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
these difficult times of continued declining metal prices and allows for the completion of the Company’s capital expenditure programs which will benefit the Company with potential production
increases and reduced risk exposure. The Company is in compliance with all financial covenants as at December 31, 2016. 
 Outstanding shares

 The authorized share capital at December 31, 2016 was an unlimited number of common shares without par value. March 28,
2017, the Company had 162.4 million shares issued and outstanding (December 31, 2015 – 161.7 million shares issued and outstanding). 
 As at
December 31, 2016, there were 1,771,877 RSUs outstanding at a weighted average fair value of C$1.16. 
 As at March 28, 2017 there are 1,498,138
RSU’s outstanding at a weighted average fair value of C$1.16. 
 On September 27, 2016, a Special Meeting of Shareholders was
held, whereby 98% of Sierra Metals’ shareholders voted in favour to amend the Company’s articles to consolidate the issued and outstanding Common Shares of the Corporation on the basis of one post-consolidation Common Share for every two
pre-consolidation Common Shares or such other consolidation ratio that the directors of the Corporation deem desirable. Such ratio is to be no greater than one post-consolidation Common Share for every five pre-consolidation Common Shares. 

9. SAFETY, HEALTH AND ENVIRONMENT 

Sierra Metals is fully committed to disciplined and responsible growth and has Safety and Health and Environmental Policies in place to
support this commitment. The Company’s corporate responsibility objectives are to prevent pollution, minimize the impact operations may cause to the environment and practice progressive rehabilitation of areas impacted by its activities. The
Company aims to operate in a socially responsible and sustainable manner, and to follow international guidelines in Mexico and Peru. The Company focuses on social programs with the local communities in Mexico and Peru on an ongoing basis. 

10. FINANCIAL INSTRUMENTS AND RELATED RISKS 

Financial risk management 
 The Company
is exposed to financial risks, including credit risk, liquidity risk, currency risk, interest rate risk and price risk. The aim of the Company’s overall risk management strategy is to reduce the potential adverse effect that these risks may
have on the Company’s financial position and results. 
 The Company’s Board of Directors has overall responsibility and oversight
of management’s risk management practices. Risk management is carried out under policies approved by the Board of Directors. The Company may from time to time, use foreign exchange contracts, future and forward contracts to manage its exposure
to fluctuations in foreign currency and metals prices. The Company does not ordinarily enter into hedging arrangements to cover long term commodity price risk unless it has the obligation to do so under a credit facility, which would be approved by
the Board of Directors. 

  
 41 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 i) Market Risk 

(1) Currency risk 

Currency risk is the risk that the fair values or future cash flows of the Company’s financial instruments will fluctuate
because of changes in foreign exchange rates. The Company and its subsidiaries’ financial instruments are exposed to currency risk where those instruments are denominated in currencies that are not the same as their functional currency;
exchange gains and losses in these situations impact net income or loss. The Company’s sales of silver, copper, lead and zinc are denominated in United States dollars and the Company’s costs are incurred in Canadian dollars, United States
dollars, Mexican pesos and Peruvian Nuevo Soles. The United States dollar is the functional currency of the Peruvian and Mexican entities. The Canadian dollar is the functional currency of all other entities. The company also holds cash and cash
equivalents, trade and other receivables and accounts payable that are subject to currency risk. 
 The following are the
most significant areas of exposure to currency risk: 
  

																	
	`	  	December 31, 2016	 
	 	  	CAN
dollar	 	  	Mexican
Peso	 	  	Peruvian
Nuevo
Soles	 	  	Total $	 
	 Cash and cash equivalents
	  	 	244	 	  	 	67	 	  	 	1,857	 	  	 	2,168	 
	 Trade and other receivables
	  	 	411	 	  	 	8,933	 	  	 	457	 	  	 	9,801	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		  	 	655	 	  	 	9,000	 	  	 	2,314	 	  	 	11,969	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Accounts payable and other liabilities
	  	 	(1,086	) 	  	 	(24,234	) 	  	 	(12,539	) 	  	 	(37,859	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total
	  	 	(432	) 	  	 	(15,234	) 	  	 	(10,225	) 	  	 	(25,891	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		
	 	  	December 31, 2015	 
	 	  	CAN
dollar	 	  	Mexican
Peso	 	  	Peruvian
Nuevo
Soles	 	  	Total $	 
	 Cash and cash equivalents
	  	 	218	 	  	 	365	 	  	 	1,093	 	  	 	1,676	 
	 Trade and other receivables
	  	 	154	 	  	 	12,794	 	  	 	351	 	  	 	13,299	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
		  	 	372	 	  	 	13,159	 	  	 	1,444	 	  	 	14,975	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Accounts payable and other liabilities
	  	 	(522	) 	  	 	(29,976	) 	  	 	(8,478	) 	  	 	(38,976	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total
	  	 	(151	) 	  	 	(16,817	) 	  	 	(7,034	) 	  	 	(24,001	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 The Company manages and monitors this risk with the objective of mitigating the potential adverse effect that
fluctuations in currencies against the Canadian dollar and US dollar could have on the Company’s Consolidated Statement of Financial Position and Consolidated Statement of income (loss). As at December 31, 2016, the Company has not entered
into any derivative contracts to mitigate this risk. 

  
 42 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 A 10% appreciation in the US dollar exchange rate against the Peruvian Nuevo
Soles and the Mexican Peso based on the financial assets and liabilities held at December 31, 2016, with all the other variables held constant, would have resulted in an increase to the Company’s net loss of $2,500 (increase in loss in
2015 of $618). 
 A 10% appreciation in the Canadian dollar exchange rate against the US dollar based on the financial
assets and liabilities held at December 31, 2016 and 2015, with all the other variables held constant, would have resulted in a negligible impact to the Company’s net income (loss). 

(2) Interest rate risk 

Interest rate risk is the risk that the fair values or future cash flows of the Company will fluctuate because of changes in
market interest rates. The Company is exposed to interest rate risk on its loans payable (note 11). The Company monitors its exposure to interest rates closely and has not entered into any derivative contracts to manage its risk. The weighted
average interest rate paid by the Company during the year ended December 31, 2016 on its loans and notes payable in Peru was 4.47% (2015 – 4.28%). With all other variables unchanged a 1% increase in the interest rate would have increased
the Company’s net loss by $635 (2015 - $598). The interest rate paid by the Company during the year ended December 31, 2016 on its loans payable in Mexico was 5.83% (2014 – 5.78). With all other variables unchanged a 1% increase in
the interest rate would have increased the Company’s net loss by $65 (2015 - $54). 
 (3) Commodity price risk

 Commodity price risk is the risk that the fair value or future cash flows of a financial instrument will fluctuate
because of changes in market prices (other than those arising from interest risk or currency risk), whether those changes are caused by factors specific to the individual financial instrument or its issuer, or factors affecting all similar financial
instruments in the market. 
 As at December 31, 2016 and 2015, the Company had certain amounts related to the sales of
concentrates that have only been provisionally priced. Commodity price risk exists solely in Mexico as the Company fixes metal prices with the purchaser of its concentrates for specific sales for which concentrates have been delivered. The
Company’s exposure to commodity price risk is as follows: 
  

									
	Commodity	  	2016
$	 	  	2015
$	 
	 10% decrease in silver prices
	  	 	(32	) 	  	 	(68	) 
	 10% decrease in copper prices
	  	 	(213	) 	  	 	(1,679	) 
	 10% decrease in lead prices
	  	 	(1	) 	  	 	(1	) 
	 10% decrease in gold prices
	  	 	(84	) 	  	 	(198	) 

  
 43 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 As at December 31, 2016 and 2015, the Company did not
have any forward contracts outstanding. 
  

	 	ii)	 Liquidity risk 

Liquidity risk is the risk that the Company will not be able to meet its financial obligation as they fall due. The Company
has in place planning, budgeting and forecasting process to help determine the funds required to support the Company’s normal operating requirements on an ongoing basis and its expansion and development plans. The Company tries to ensure that
it has sufficient committed credit facilities to meet its short-term operating needs. 
 In the normal course of business,
the Company enters into contracts that give rise to commitments for future minimum payments. The following table summarizes the remaining contractual maturities and undiscounted cash flows as at December 31, 2016 of the Company’s financial
liabilities and operating and capital commitments: 
  

																					
	 	  	Within 1 year	 	  	1-2 years	 	  	2-5 years	 	  	After 5 years	 	  	Total	 
	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 
	 Accounts payable and accrued liabilities
	  	 	29,828	 	  	 	—  	 	  	 	—  	 	  	 	—  	 	  	 	29,828	 
	 Loans payable(1)
	  	 	28,633	 	  	 	14,280	 	  	 	34,500	 	  	 	—  	 	  	 	77,413	 
	 Interest on loans payable
	  	 	745	 	  	 	274	 	  	 	250	 	  	 	—  	 	  	 	1,269	 
	 Other liabilities
	  	 	4,509	 	  	 	1,149	 	  	 	—  	 	  	 	—  	 	  	 	5,658	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total Commitments
	  	 	63,715	 	  	 	15,703	 	  	 	34,750	 	  	 	—  	 	  	 	114,168	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

  

	 	(1)	 Current portion includes $14.8 million of notes payable from Scotiabank Peru which are a revolving credit
facility 

 In the opinion of management, the working captial at December 31, 2016, together with
future cash flows from operations and available loan facilities, is sufficient to support the Company’s commitments through 2017. 
  

	 	iii)	 Credit risk 

Credit risk is the risk that the counterparty to a financial instrument might fail to discharge its obligations under the
terms of a financial contract. Credit risk is primarily associated with trade receivables; however, it also arises on cash and cash equivalents. The Company sells its concentrate to large international organizations. The Company is exposed to
significant concentration of credit risk given that all of its revenues from Peru and Mexico were from two customers at each of the locations. At December 31, 2016 the Company has not recorded an allowance against trade receivables because it
is confident that all of the balances will be collected in full when due and there have not been any issues collecting balances owed to the Company in the past. 

The Company’s policy is to keep its cash and cash equivalents only with highly rated financial institutions and to only
invest in government securities. The Company considers the risk of loss associated with cash and cash equivalents to be low. The counterparty to the financial asset is a large international financial institution with strong credit ratings and thus
the credit risk is considered to be low. 

  
 44 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	11.	 OTHER RISKS AND UNCERTAINTIES 

Foreign operations 
 The Company
currently conducts foreign operations and has exploration properties in Peru and Mexico, and as such is exposed to various levels of economic, political and other risks and uncertainties. These risks and uncertainties vary from country to country
and include, but are not limited to, royalties and tax increases or claims by governmental bodies, expropriation or nationalization, foreign exchange controls, import and export regulations, cancellation or renegotiation of contracts and
environmental permitting regulations. The occurrence of these various factors and uncertainties cannot be accurately predicted and could have a material adverse effect on operations or profitability. 

The Company currently has no political risk insurance coverage against these risks. The Company is unable to determine the impact of these
risks on its future financial position or results of operations. Changes, if any, in mining or investment policies or shifts in political attitude in foreign countries may substantively affect Company’s exploration, development and production
activities. 
 Environmental regulation 

The Company’s activities are subject to extensive laws and regulations governing environmental protection which are complex and have
tended to become more stringent over time. The Company is required to obtain governmental permits and in some instances provide bonding requirements under federal, state, or provincial air, water quality, and mine reclamation rules and permits.
Although the Company makes provisions for reclamation costs, it cannot be assured that these provisions will be adequate to discharge its future obligations for these costs. Failure to comply with applicable environmental laws may result in
injunctions, damages, suspension or revocation of permits and imposition of penalties. While responsible environmental stewardship is one of the Company’s top priorities, there can be no assurance that the Company has been or will be at all
times in complete compliance with such laws, regulations and permits, or that the costs of complying with current and future environmental laws and permits will not materially and adversely affect the Company’s business, results of operations
or financial condition. 
 Exploration, development and mining risk 

Sierra’s operations will be subject to all the hazards and risks normally encountered in the exploration, development and production of
base or precious metals, including, without limitation, unusual and unexpected geologic formations, seismic activity, rock bursts, pit-wall failures, cave-ins, flooding, mudrushes and other conditions involved in the drilling, mining and removal of
material, any of which could result in damage to, or destruction of, mines and other producing facilities, damage to life or property, environmental damage and legal liability. Milling operations are also subject to various hazards, including,
without limitation, equipment failure and failure of retaining dams around tailings disposal areas, which may result in environmental pollution and legal liability. 

  
 45 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Loan repayment risk 

The Company’s ability to repay its loans depends on its future cash flows, profitability, results of operations and financial condition.
The Company has prepared budgets based on estimates of commodity prices, future production, operating costs and capital costs however the Company cannot assure you that such revenues, production plans, costs or other estimates will be achieved.
Actual revenues and production costs may vary from the estimates depending on a variety of factors, many of which are not within the Company’s control. These factors include, but are not limited to: commodity price fluctuations; actual ore
mined varying from estimates of grade, tonnage, dilution, and metallurgical and other characteristics; mine failures, slope failures or equipment failures; industrial accidents; natural phenomena such as inclement weather conditions, floods,
droughts, rock slides and earthquakes; encountering unusual or unexpected geological conditions; changes in power costs and potential power shortages; exchange rate and commodity price fluctuations; shortages of principal supplies needed shortages
of principal supplies needed for operations, including explosives, fuels, chemical reagents, water, equipment parts and lubricants; labor shortages or strikes; high rates of inflation; civil disobedience and protests; and restrictions (including
change to the taxation regime) or regulations imposed by governmental or regulatory authorities or other changes in the regulatory environments. Failure to achieve revenue, production or cost estimates or material increases in costs or material
decreases in commodity prices could have a material adverse impact on the Company’s future cash flows, profitability, results of operations and financial condition. 

Title risk 
 Although the Company
believes that it has exercised commercially reasonable due diligence with respect to determining title to properties that it owns or controls, there is no guarantee that title to such properties will not be challenged or impugned. The Company’s
properties may be subject to prior unrecorded agreements or transfers or native land claims and title may be affected by undetected defects. There may be valid challenges to the title of the Company’s properties which could impair development
and/or operations of the Company. 
 Permit risk 

In the ordinary course of business, the Company will be required to obtain and renew governmental permits and licenses for the operation and
expansion of existing operations or for the commencement of new operations. Obtaining or renewing the necessary governmental permits is a complex and time-consuming process. The duration and success of the Company’s efforts to obtain and renew
permits and licenses are contingent upon many variables not within its control including the interpretation of applicable requirements implemented by the permitting or licensing authority. The Company may not be able to obtain or renew permits and
licenses that are necessary to continue its operations or the cost to obtain or renew permits and licenses may exceed what the Company expects. Any unexpected delays or costs associated with the permitting and licensing process could delay the
development or impede operations, which may adversely affect the Company’s revenues and future growth. 

  
 46 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 Estimates of mineralized materials are subject to geologic uncertainty and inherent sample variability

 Although the estimated resources have been delineated with appropriately spaced drilling and sampling, both underground and surface,
there is inherent variability between duplicate samples taken adjacent to each other and between sampling points that cannot be reasonably eliminated. There also may be unknown geologic details that have not been identified or correctly appreciated
at the current level of delineation. This results in uncertainties that cannot be reasonably eliminated from the estimation process. Some of the resulting variances can have a positive effect and others can have a negative effect on mining and
processing operations. Acceptance of these uncertainties is part of any mining operation. 
 Estimates of mineralized material constitute
forward-looking information, which is inherently subject to variability. Although resource estimates require a high degree of assurance in the underlying data when the estimates are made, unforeseen events and uncontrollable factors can have
significant adverse or positive impacts on the estimates. Actual results will inherently differ from estimates. The unforeseen events and uncontrollable factors include: geologic uncertainties including inherent sample variability, metal price
fluctuations, variations in mining and processing parameters, and adverse changes in environmental or mining laws and regulations. The timing and effects of variances from estimated values cannot be accurately predicted. 

Mineral resources 
 Although the
Company’s reported mineral resources have been carefully prepared by qualified persons, these amounts are estimates only by independent geologists, and the Company cannot be certain that any specified level of recovery of mineral will in fact
be realized or that any identified mineral deposit will ever qualify as a commercially mineable (or viable) ore body that can be economically exploited. Mineralized materials, which are not mineral reserves, do not have demonstrated economic
viability. Any material change in the quantity of mineralization, grade or stripping ratio, or the metal price may affect the economic viability of the Company’s properties. In addition, the Company cannot be certain that metal recoveries in
small-scale laboratory tests will be duplicated in larger scale tests under on-site conditions or during production. 
 Until an un-mined
deposit is actually mined and processed, the quantity of mineral resources and reserves and grades must be considered as estimates only. In addition, the economic value of mineral reserves and mineral resources may vary depending on, among other
things, metal prices. 
 Insurance risk 

The Company’s insurance will not cover all the potential risks associated with a mining company’s operations. The Company may also
be unable to maintain insurance to cover these risks at economically feasible premiums. Insurance coverage may not continue to be available or may not be adequate to cover any resulting liability. Moreover, the Company expects that insurance against
risks such as environmental pollution or other hazards as a result of exploration and production may be prohibitively expensive to obtain for a company of Sierra’s size and financial means. The Company might also become subject to liability for
pollution or other hazards which may not be insured against or which the Company may elect not to insure against because of premium costs or other reasons. Losses from these events may cause the Company to incur

  
 47 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
significant costs that could have a material adverse effect upon the Company’s financial condition and results of operations. 

Competitive risk 
 The mining industry is
competitive in all of its phases. The Company faces strong competition from other mining companies in connection with the acquisition of properties producing, or capable of producing, base and precious metals. Many of these companies have greater
financial resources, operational experience and technical capabilities than the Company does. As a result of this competition, the Company may be unable to maintain or acquire attractive mining properties on terms acceptable to the Company or at
all. Consequently, the Company’s revenues, operations and financial condition could be materially adversely affected. 
 Sierra’s common shares
may experience price volatility 
 Securities of mineral resource and mining companies have experienced substantial volatility in the
past, often based on factors unrelated to the financial performance or prospects of the companies involved. These factors include macroeconomic developments in North America and globally, as well as market perceptions of the attractiveness of
particular industries. The price of the Company’s common shares is also likely to be significantly affected by short-term changes in commodity prices and currency exchange fluctuation. As a result of any of these factors, the market price of
the Company’s common shares at any given point in time may not accurately reflect the long-term value of the Company. Securities class-action litigation often has been brought against companies following periods of volatility in the market
price of their securities. The Company may in the future be the target of similar litigation. Securities litigation could result in substantial costs and damages and divert management’s attention and resources. 

Global financial risk 
 Financial markets
globally have been subject to increased volatility. Access to financing has been negatively impacted by liquidity crises throughout the world. These factors may impact the Company’s ability to obtain loans and other credit facilities in the
future and, if obtained, on terms favorable to Sierra. The levels of volatility and market turmoil are on the rise, and the Company may not be able to secure appropriate debt or equity financing, any of which could affect the trading price of the
Company’s securities in an adverse manner. 
 Claims and Legal Proceedings 

The Company is subject to various claims and legal proceedings covering a wide range of matters that arise in the normal course of business.
Each of these matters is subject to various uncertainties and it is possible that some of these matters may be resolved unfavorably to the Company. The Company carries liability insurance coverage and will establish accruals and provisions for
matters that are probable and can be reasonably estimated. In addition, the Company may be involved in disputes with other parties in the future which may result in a significant impact on our financial condition, cash flow and results of
operations. 

  
 48 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The claims associated with the Company’s Mexican operations are discussed in detail below: 

 

	 	a)	 In October 2009, Polo y Ron Minerals, S.A. de C.V. (“P&R”) sued the Company and one of its
subsidiaries, Dia Bras Mexicana S.A. de C.V. (“DBM”). P&R claimed damages for the cancelation of an option agreement (the “Option Agreement”) regarding the San Jose properties in Chihuahua, Mexico (the “San Jose
Properties”). The San Jose Properties are not located in any areas where DBM currently operates, nor are these properties included in any resource estimates of the Company. The Company believes that it has complied with all of its obligations
pertaining to the Option Agreement. In October 2011, the 8th Civil Court of the Judicial District of Morelos in Chihuahua issued a resolution that absolved the Company from the claims brought against it by P&R on the basis that P&R did not
provide evidence to support any of its claims. P&R appealed this resolution to the State Court, which overruled the previous resolution and ordered the Company to: (i) transfer to P&R 17 mining concessions from the Company’s
Bolivar project, including the mining concessions where both mine operations and mineral reserves are located; and (ii) pay $423 to P&R; the Company was not appropriately notified of this resolution. In February 2013, a Federal Court in the
State of Chihuahua granted the Company a temporary suspension of the adverse resolution issued by the State Court of Chihuahua, Mexico. In July 2014, a Federal Court in the State of Chihuahua ordered that the Company was entitled to receive proper
notice of the adverse resolution previously issued by the State Court of Chihuahua. This allows the Company to proceed with its appeal (writ of “amparo”) of the State Court’s previous resolution. The adverse resolution has been
temporarily suspended since March 2013, which suspension will remain in place pending the writ of amparo. The amparo is being heard in Federal Court and will challenge the State Court’s ruling. The Federal Court’s verdict in the amparo
will be final and non-appealable. The Company continues to vigorously defend its position by applying the proper legal resources necessary to defend its position. On February 12, 2016, The Second Federal Collegiate Court of Civil and Labor
Matters, of the Seventeenth circuit in the State of Chihuahua, (“the Federal Court”) issued a new judgment ruling that the State Court lacked jurisdiction to rule on issues concerning mining titles, and that no previous rulings by the
State Court against the Company shall stand. They ordered the cancellation of the previous adverse resolution by the state Court. The Company will continue to vigorously defend this claim. Sierra Metals continues to believe that the original claim
is without merit.

  

	 	b)	 In 2009, a personal action was filed in Mexico against DBM by an individual, Ambrosio Bencomo
Muñoz as administrator of the intestate succession of Ambrosio Bencomo Casavantes y Jesus Jose Bencomo Muñoz, claiming the annulment and revocation of the purchase agreement of two mining concessions, Bolívar III and IV between
Minera Senda de Plata S.A. de C.V. and Ambrosio Bencomo Casavantes, and with this, the nullity of purchase agreement between DBM and Minera Senda de Plata S.A. de C.V. In June 2011, the Sixth Civil Court of Chihuahua, Mexico, ruled that the claim
was unfounded and dismissed the case, the plaintiff appealed to the State Court. 

  
 49 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	12.	 NON-IFRS PERFORMANCE MEASURES 

The non-IFRS performance measures presented do not have any standardized meaning prescribed by IFRS and are therefore unlikely to be directly
comparable to similar measures presented by other issuers. 
 Non-IFRS reconciliation of adjusted EBITDA 

EBITDA is a non-IFRS measure that represents an indication of the Company’s continuing capacity to generate earnings from operations
before taking into account management’s financing decisions and costs of consuming capital assets, which vary according to their vintage, technological currency, and management’s estimate of their useful life. EBITDA comprises revenue less
operating expenses before interest expense (income), property, plant and equipment amortization and depletion, and income taxes. Adjusted EBITDA has been included in this document. Under IFRS, entities must reflect in compensation expense the cost
of share-based payments. In the Company’s circumstances, share-based payments involve a significant accrual of amounts that will not be settled in cash but are settled by the issuance of shares in exchange for cash. As such, the Company has
made an entity specific adjustment to EBITDA for these expenses. The Company has also made an entity-specific adjustment to the foreign currency exchange (gain)/loss. The Company considers cash flow before movements in working capital to be the IFRS
performance measure that is most closely comparable to adjusted EBITDA. 
 The following table provides a reconciliation of adjusted EBITDA
to the condensed interim consolidated financial statements for the three and twelve months ended December 31, 2016 and 2015: 
  

																	
	 	  	Three Months Ended	 	  	Year Ended	 
	 (In thousands of United States dollars)
	  	December 31, 2016	 	  	December 31, 2015	 	  	December 31, 2016	 	  	December 31, 2015	 
	 Net income (loss)
	  	$	(5,210	) 	  	$	(28,542	) 	  	$	(12,721	) 	  	$	(35,313	) 
	 Adjusted for:
	  				  				  				  			
	 Depletion and depreciation
	  	 	15,301	 	  	 	11,571	 	  	 	45,711	 	  	 	46,940	 
	 Interest expense and other finance costs
	  	 	(274	) 	  	 	1,558	 	  	 	3,676	 	  	 	4,776	 
	 Interest income
	  	 	(18	) 	  	 	(35	) 	  	 	(60	) 	  	 	(67	) 
	 Share-based payments
	  	 	364	 	  	 	175	 	  	 	819	 	  	 	1,317	 
	 Foreign currency exchange gain
	  	 	(520	) 	  	 	719	 	  	 	(1,295	) 	  	 	(1,513	) 
	 Impairment charges
	  	 	—  	 	  	 	19,000	 	  	 	—  	 	  	 	19,000	 
	 Income taxes
	  	 	6,342	 	  	 	(6,381	) 	  	 	5,757	 	  	 	(2,823	) 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Adjusted EBITDA
	  	$	15,985	 	  	$	(1,935	) 	  	$	41,887	 	  	$	32,317	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 Non-IFRS reconciliation of adjusted net income (loss) 

The Company has included the non-IFRS financial performance measure of adjusted net income (loss), defined by management as the net income
(loss) attributable to shareholders shown in the statement of earnings plus the non-cash depletion charge due to the acquisition of Corona and the corresponding deferred tax recovery and certain non-recurring or non-cash items such as share-based
compensation and foreign currency exchange (gains) losses. The Company believes that, in addition to conventional measures prepared in accordance with IFRS, certain investors may want to use this information to evaluate the Company’s
performance and ability to generate cash flows. Accordingly, it is intended to provide additional information and should not 

  
 50 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
be considered in isolation or as a substitute for measures of performance in accordance with IFRS. 

The following table provides a reconciliation of adjusted net income (loss) to the condensed interim consolidated financial statements for the
three and twelve months ended December 31, 2016 and 2015: 
  

																	
	 	  	Three Months Ended	 	  	Year Ended	 
	 (In thousands of United States dollars)
	  	December 31, 2016	 	  	December 31, 2015	 	  	December 31, 2016	 	  	December 31, 2015	 
	 Net income (loss) attributable to shareholders
	  	$	(5,076	) 	  	$	(27,083	) 	  	$	(12,265	) 	  	$	(33,302	) 
	 Non-cash depletion charge on Corona’s acquisition
	  	 	8,391	 	  	 	5,744	 	  	 	24,384	 	  	 	27,562	 
	 Deferred tax recovery on Corona’s acquisition depletion charge
	  	 	357	 	  	 	(2,154	) 	  	 	(4,637	) 	  	 	(8,956	) 
	 Share-based compensation
	  	 	364	 	  	 	175	 	  	 	819	 	  	 	1,317	 
	 Foreign currency exchange gain
	  	 	(520	) 	  	 	719	 	  	 	(1,295	) 	  	 	(1,513	) 
	 Impairment charges
	  	 	—  	 	  	 	19,000	 	  	 	—  	 	  	 	19,000	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Adjusted net income (loss) attributable to shareholders
	  	$	3,516	 	  	$	(3,599	) 	  	$	7,006	 	  	$	4,108	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 Cash cost per silver equivalent payable ounce and copper equivalent payable pound 

The Company uses the non-IFRS measure of cash cost per silver equivalent ounce and copper equivalent payable pound to manage and evaluate
operating performance. The Company believes that, in addition to conventional measures prepared in accordance with IFRS, certain investors use this information to evaluate the Company’s performance and ability to generate cash flows.
Accordingly, it is intended to provide additional information and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with IFRS. The Company considers cost of sales per silver equivalent
payable ounce and copper equivalent payable pound to be the most comparable IFRS measure to cash cost per silver equivalent payable ounce and copper equivalent payable pound and has included calculations of this metric in the reconciliations within
the applicable tables to follow. This is the first time the Company is including the cost of sales per equivalent ounce and pound metrics. 
 All-in
sustaining cost per silver equivalent payable ounce and copper equivalent payable pound 
 All-In Sustaining Cost (“AISC”) is
a non-IFRS measure and was calculated based on guidance provided by the World Gold Council (“WGC”) in June 2013. WGC is not a regulatory industry organization and does not have the authority to develop accounting standards for disclosure
requirements. Other mining companies may calculate AISC differently as a result of differences in underlying accounting principles and policies applied, as well as differences in definitions of sustaining versus development capital expenditures.

 Effective Q4 2015, the Company changed its methodology for calculating the cash cost and all-in sustaining cost metrics from a silver
payable ounce and copper payable pound, net of by-product credits basis, to a silver equivalent payable ounce and copper equivalent payable pound basis, including treatment and refining charges of all metals in the calculation. 

AISC is a more comprehensive measure than cash cost per ounce/pound for the Company’s consolidated operating performance by providing
greater visibility, comparability and representation of the total costs associated with producing silver and copper from its current operations. 

  
 51 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The Company defines sustaining capital expenditures as, “costs incurred to
sustain and maintain existing assets at current productive capacity and constant planned levels of productive output without resulting in an increase in the life of assets, future earnings, or improvements in recovery or grade. Sustaining capital
includes costs required to improve/enhance assets to minimum standards for reliability, environmental or safety requirements. Sustaining capital expenditures excludes all expenditures at the Company’s new projects and certain expenditures at
current operations which are deemed expansionary in nature.” 
 Consolidated AISC includes total production cash costs incurred at
the Company’s mining operations, including treatment and refining charges and selling costs, which forms the basis of the Company’s total cash costs. Additionally, the Company includes sustaining capital expenditures and corporate general
and administrative expenses. AISC by mine does not include certain corporate and non-cash items such as general and administrative expense and share-based payments. The Company believes that this measure represents the total sustainable costs of
producing silver and copper from current operations, and provides the Company and other stakeholders of the Company with additional information of the Company’s operational performance and ability to generate cash flows. As the measure seeks to
reflect the full cost of silver and copper production from current operations, new project capital and expansionary capital at current operations are not included. Certain other cash expenditures, including tax payments, dividends and financing
costs are also not included. 
 The following table provides a reconciliation of cash costs to cost of sales, as reported in the
Company’s condensed interim consolidated statement of loss for the three and twelve months ended December 31, 2016 and 2015: 
  

																																					
	 (In thousand of US dollars, unless stated)
	  	 	 	  	Three months ended
December 31, 2016	 	 	Three months ended
December 31, 2015	 
	 	  	 	 	  	Yauricocha	 	 	Bolivar	 	 	Cusi	 	 	Consolidated	 	 	Yauricocha	 	 	Bolivar	 	 	Cusi	 	 	Consolidated	 
	 Cash Cost per Tonne of Processed Ore
	  				  				 				 				 				 				 				 				 			
	 Cost of Sales
	  				  	 	26,475	 	 	 	5,204	 	 	 	3,837	 	 	 	35,515	 	 	 	18,389	 	 	 	9,725	 	 	 	4,788	 	 	 	32,902	 
	 Reverse: Workers Profit Sharing
	  				  	 	(970	) 	 	 	—  	 	 	 	—  	 	 	 	(970	) 	 	 	342	 	 	 	—  	 	 	 	—  	 	 	 	342	 
	 Reverse: D&A/Other adjustments
	  				  	 	(11,488	) 	 	 	(1,744	) 	 	 	(1,287	) 	 	 	(14,519	) 	 	 	(7,453	) 	 	 	(2,356	) 	 	 	(1,591	) 	 	 	(11,400	) 
	 Reverse: Variation in Finished Inventory
	  				  	 	(729	) 	 	 	1,901	 	 	 	(465	) 	 	 	707	 	 	 	(203	) 	 	 	(2,074	) 	 	 	(701	) 	 	 	(2,978	) 
		  				  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Total Cash Cost
	  				  	 	13,288	 	 	 	5,361	 	 	 	2,085	 	 	 	20,734	 	 	 	11,075	 	 	 	5,295	 	 	 	2,496	 	 	 	18,866	 
	 Tonnes Processed
	  				  	 	236,650	 	 	 	245,000	 	 	 	36,055	 	 	 	517,706	 	 	 	193,711	 	 	 	211,311	 	 	 	51,821	 	 	 	456,843	 
	 Cash Cost per Tonne Processed
	  	US$		 	  	 	56.15	 	 	 	21.88	 	 	 	57.83	 	 	 	40.05	 	 	 	57.17	 	 	 	25.06	 	 	 	48.17	 	 	 	41.30	 
		  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
				
	 (In thousand of US dollars, unless stated)
	  	 	 	  	Year ended
December 31, 2016	 	 	Year ended
December 31, 2015	 
	 	  	 	 	  	Yauricocha	 	 	Bolivar	 	 	Cusi	 	 	Consolidated	 	 	Yauricocha	 	 	Bolivar	 	 	Cusi	 	 	Consolidated	 
	 Cash Cost per Tonne of Processed Ore
	  				  				 				 				 				 				 				 				 			
	 Cost of Sales
	  				  	 	85,901	 	 	 	26,009	 	 	 	14,491	 	 	 	126,400	 	 	 	80,297	 	 	 	32,462	 	 	 	13,962	 	 	 	126,721	 
	 Reverse: Workers Profit Sharing
	  				  	 	(1,939	) 	 	 	—  	 	 	 	—  	 	 	 	(1,939	) 	 	 	(1,148	) 	 	 	—  	 	 	 	—  	 	 	 	(1,148	) 
	 Reverse: D&A/Other adjustments
	  				  	 	(32,445	) 	 	 	(6,309	) 	 	 	(5,814	) 	 	 	(44,568	) 	 	 	(34,622	) 	 	 	(6,551	) 	 	 	(5,560	) 	 	 	(46,733	) 
	 Reverse: Variation in Finished Inventory
	  				  	 	(1,472	) 	 	 	3,462	 	 	 	444	 	 	 	2,434	 	 	 	(714	) 	 	 	(2,740	) 	 	 	(534	) 	 	 	(3,988	) 
		  				  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 
	 Total Cash Cost
	  				  	 	50,045	 	 	 	23,162	 	 	 	9,121	 	 	 	82,328	 	 	 	43,813	 	 	 	23,171	 	 	 	7,868	 	 	 	74,852	 
	 Tonnes Processed
	  				  	 	897,169	 	 	 	950,398	 	 	 	186,897	 	 	 	2,034,465	 	 	 	832,226	 	 	 	830,447	 	 	 	202,033	 	 	 	1,864,706	 
	 Cash Cost per Tonne Processed
	  	US$		 	  	 	55.78	 	 	 	24.37	 	 	 	48.80	 	 	 	40.47	 	 	 	52.65	 	 	 	27.90	 	 	 	38.94	 	 	 	40.14	 
		  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 	 	  
	  
	 

  
 52 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The following table provides detailed information on Yauricocha’s cost of sales, cash
cost, and all-in sustaining cost per silver equivalent payable ounce and copper equivalent payable pound for the three and twelve months ended December 31, 2016 and 2015: 

Yauricocha: 
  

																					
	 	  	 	 	  	Three months ended	 	  	Year ended	 
	 (In thousand of US dollars, unless stated)
	  	 	 	  	December 31, 2016	 	  	December 31, 2015	 	  	December 31, 2016	 	  	December 31, 2015	 
	 Cash Cost (recovery) per silver payable ounce
	  				  				  				  				  			
	 Total Cash Cost
	  				  	 	13,288	 	  	 	11,075	 	  	 	50,045	 	  	 	43,813	 
	 Variation in Finished inventory
	  				  	 	729	 	  	 	203	 	  	 	1,472	 	  	 	714	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Total Cash Cost of Sales
	  				  	 	14,017	 	  	 	11,278	 	  	 	51,517	 	  	 	44,527	 
	 Treatment and Refining Charges
	  				  	 	5,554	 	  	 	4,536	 	  	 	19,502	 	  	 	24,085	 
	 Selling Costs
	  				  	 	1,022	 	  	 	667	 	  	 	3,613	 	  	 	3,382	 
	 G&A Costs
	  				  	 	1,598	 	  	 	1,267	 	  	 	4,928	 	  	 	4,583	 
	 Sustaining Capital Expenditures
	  				  	 	1,851	 	  	 	1,802	 	  	 	7,357	 	  	 	6,579	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 All-In Sustaining Cash Costs
	  				  	 	24,042	 	  	 	19,550	 	  	 	86,917	 	  	 	83,156	 
	 Silver Equivalent Payable Ounces (000’s)
	  				  	 	1,922	 	  	 	1,140	 	  	 	6,628	 	  	 	6,275	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cost of Sales per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	7.73	 	  	 	9.74	 	  	 	8.10	 	  	 	7.32	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	7.29	 	  	 	9.89	 	  	 	7.77	 	  	 	7.10	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 All-In Sustaining Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	12.51	 	  	 	17.15	 	  	 	13.11	 	  	 	13.25	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Copper Equivalent Payable Pounds
	  				  	 	12,777	 	  	 	7,575	 	  	 	44,069	 	  	 	41,719	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cost of Sales per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.16	 	  	 	1.47	 	  	 	1.22	 	  	 	1.10	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.10	 	  	 	1.49	 	  	 	1.17	 	  	 	1.07	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 All-In Sustaining Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.88	 	  	 	2.58	 	  	 	1.97	 	  	 	1.99	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 The following table provides detailed information on Bolivar’s cost of sales, cash cost, and all-in
sustaining cost per copper equivalent payable pound and silver equivalent payable ounce for the three and twelve months ended December 31, 2016 and 2015: 

Bolivar: 
  

																					
	 	  	 	 	  	Three months ended	 	  	Year ended	 
	 (In thousand of US dollars, unless stated)
	  	 	 	  	December 31, 2016	 	 	December 31, 2015	 	  	December 31, 2016	 	 	December 31, 2015	 
	 Cash Cost per copper payable pound
	  				  				 				  				 			
	 Total Cash Cost
	  				  	 	5,361	 	 	 	5,295	 	  	 	23,162	 	 	 	23,171	 
	 Variation in Finished inventory
	  				  	 	(1,901	) 	 	 	2,074	 	  	 	(3,462	) 	 	 	2,740	 
		  				  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Total Cash Cost of Sales
	  				  	 	3,460	 	 	 	7,369	 	  	 	19,700	 	 	 	25,911	 
	 Treatment and Refining Charges
	  				  	 	1,254	 	 	 	1,724	 	  	 	5,697	 	 	 	6,427	 
	 Selling Costs
	  				  	 	527	 	 	 	774	 	  	 	2,610	 	 	 	3,085	 
	 G&A Costs
	  				  	 	781	 	 	 	1,058	 	  	 	3,219	 	 	 	3,656	 
	 Sustaining Capital Expenditures
	  				  	 	2,936	 	 	 	1,288	 	  	 	7,827	 	 	 	5,708	 
		  				  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 All-In Sustaining Cash Costs
	  				  	 	8,957	 	 	 	12,213	 	  	 	39,052	 	 	 	44,787	 
	 Silver Equivalent Payable Ounces (000’s)
	  				  	 	498	 	 	 	776	 	  	 	2,577	 	 	 	2,938	 
		  				  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Cost of Sales per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	10.10	 	 	 	10.10	 	  	 	8.95	 	 	 	9.27	 
		  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	6.95	 	 	 	9.50	 	  	 	7.64	 	 	 	8.82	 
		  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 All-In Sustaining Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	17.99	 	 	 	15.74	 	  	 	15.15	 	 	 	15.24	 
		  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Copper Equivalent Payable Pounds
	  				  	 	3,310	 	 	 	5,159	 	  	 	17,131	 	 	 	19,535	 
		  				  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Cost of Sales per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.52	 	 	 	1.52	 	  	 	1.35	 	 	 	1.39	 
		  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.05	 	 	 	1.43	 	  	 	1.15	 	 	 	1.33	 
		  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 All-In Sustaining Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	2.71	 	 	 	2.37	 	  	 	2.28	 	 	 	2.29	 
		  	  
	  
	 	  	  
	  
	 	 	  
	  
	 	  	  
	  
	 	 	  
	  
	 

  
 53 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 The following table provides detailed information on Cusi’s cost of sales, cash cost,
and all-in sustaining cost per silver equivalent payable ounce and copper equivalent payable pound for the three and twelve months ended December 31, 2016 and 2015: 

Cusi: 
  

																					
	 	  	 	 	  	Three months ended	 	  	Year ended	 
	 (In thousand of US dollars, unless stated)
	  	 	 	  	December 31, 2016	 	  	December 31, 2015	 	  	December 31, 2016	 	 	December 31, 2015	 
	 Cash Cost (recovery) per silver payable ounce
	  				  				  				  				 			
	 Total Cash Cost
	  				  	 	2,085	 	  	 	2,496	 	  	 	9,121	 	 	 	7,868	 
	 Variation in Finished inventory
	  				  	 	465	 	  	 	701	 	  	 	(444	) 	 	 	534	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Total Cash Cost of Sales
	  				  	 	2,550	 	  	 	3,197	 	  	 	8,677	 	 	 	8,402	 
	 Treatment and Refining Charges
	  				  	 	678	 	  	 	692	 	  	 	2,868	 	 	 	2,354	 
	 Selling Costs
	  				  	 	116	 	  	 	182	 	  	 	573	 	 	 	724	 
	 G&A Costs
	  				  	 	172	 	  	 	248	 	  	 	707	 	 	 	857	 
	 Sustaining Capital Expenditures
	  				  	 	1,319	 	  	 	1,490	 	  	 	4,401	 	 	 	12,889	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 All-In Sustaining Cash Costs
	  				  	 	4,835	 	  	 	5,809	 	  	 	17,226	 	 	 	25,226	 
	 Silver Equivalent Payable Ounces (000’s)
	  				  	 	117	 	  	 	266	 	  	 	844	 	 	 	953	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Cost of Sales per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	9.44	 	  	 	9.59	 	  	 	6.00	 	 	 	7.15	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	21.80	 	  	 	12.02	 	  	 	10.28	 	 	 	8.82	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 All-In Sustaining Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	41.32	 	  	 	21.84	 	  	 	20.41	 	 	 	26.47	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Copper Equivalent Payable Pounds
	  				  	 	1,119	 	  	 	1,771	 	  	 	5,611	 	 	 	6,339	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Cost of Sales per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	0.99	 	  	 	1.44	 	  	 	0.90	 	 	 	1.07	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	2.28	 	  	 	1.81	 	  	 	1.55	 	 	 	1.33	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 
	 All-In Sustaining Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	4.32	 	  	 	3.28	 	  	 	3.07	 	 	 	3.98	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	 	  
	  
	 

 Consolidated: 
  

																					
	 	  	 	 	  	Three months ended	 	  	Year ended	 
	 (In thousand of US dollars, unless stated)
	  	 	 	  	December 31, 2016	 	  	December 31, 2015	 	  	December 31, 2016	 	  	December 31, 2015	 
	 Total Cash Cost of Sales
	  				  	 	20,027	 	  	 	21,844	 	  	 	79,894	 	  	 	78,840	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 All-In Sustaining Cash Costs
	  				  	 	37,834	 	  	 	37,572	 	  	 	143,195	 	  	 	153,169	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Silver Equivalent Payable Ounces (000’s)
	  				  	 	2,537	 	  	 	2,182	 	  	 	10,049	 	  	 	10,166	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cost of Sales per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	8.28	 	  	 	9.85	 	  	 	8.14	 	  	 	7.87	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	7.89	 	  	 	10.01	 	  	 	7.95	 	  	 	7.76	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 All-In Sustaining Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	14.91	 	  	 	17.22	 	  	 	14.25	 	  	 	15.07	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Copper Equivalent Payable Pounds
	  				  	 	17,206	 	  	 	14,505	 	  	 	66,811	 	  	 	67,593	 
		  				  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cost of Sales per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.22	 	  	 	1.48	 	  	 	1.22	 	  	 	1.18	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.16	 	  	 	1.51	 	  	 	1.20	 	  	 	1.17	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 All-In Sustaining Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	2.20	 	  	 	2.59	 	  	 	2.14	 	  	 	2.27	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 

 Additional non-IFRS measures 

The Company uses other financial measures, the presentation of which is not meant to be a substitute for other subtotals or totals presented
in accordance with IFRS, but rather should be evaluated in conjunction with such IFRS measures. The following other financial measures are used: 

	 	•	 	 Operating cash flows before movements in working capital - excludes the movement from period-to-period in
working capital items including trade and other receivables, prepaid expenses, deposits, inventories, trade and other payables and the effects of foreign exchange rates on these items. 

The terms described above do not have a standardized meaning prescribed by IFRS, and therefore the Company’s definitions are unlikely to
be comparable to similar measures presented by other companies. The Company’s management believes that their presentation provides useful information to investors because cash flows generated from operations before changes in working capital
excludes the movement in working capital items. This, in management’s view, provides useful information of the Company’s cash flows from operations and are considered to be meaningful in evaluating the Company’s past financial
performance or its future prospects. The most comparable IFRS measure is cash flows from operating activities. 

  
 54 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	13.	 RELATED PARTY TRANSACTIONS 

During the year ended December 31, 2016, the Company recorded consulting fees of $200 (2015 - $250) to companies
related by common directors or officers. At December 31, 2016, accounts payable and accrued liabilities include $Nil (2015 – $Nil) with these related parties. Related party transactions occurred in the normal course of business. As at
December 31, 2016, the Company has accounts receivable outstanding from these related parties of $285 (2015 - $200). The accounts receivable balance relates to withholding taxes paid by the Company on taxable benefits related to RSU’s
vested. 
  

	(a)	 Compensation of directors and key management personnel 

The remuneration of the Company’s directors, officers and other key management personnel during the years ended
December 31, 2016 and 2015 are as follows: 
  

									
	 	  	2016	 	  	2015	 
	 	  	$	 	  	$	 
	 Salaries and other short term employment benefits
	  	 	3,847	 	  	 	3,346	 
	 Share-based payments
	  	 	897	 	  	 	1,404	 
		  	  
	  
	 	  	  
	  
	 
	 Total compensation
	  	 	4,744	 	  	 	4,750	 
		  	  
	  
	 	  	  
	  
	 

  

	(b)	 Principal Subsidiaries 

The consolidated financial statements include the accounts of the Company and its subsidiaries, which are entities controlled
by the Company. Control exists when the Company is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. Subsidiaries are consolidated from
the date that control commences until the date that control ceases. 
 Non-controlling interests represent equity interests
in subsidiaries owned by outside parties. Changes in the parent company’s ownership interest in subsidiaries that do not result in a loss of control are accounted for as equity transactions. 

The principal subsidiaries of the Company and their geographical locations as at December 31, 2016 are as follows: 

 

					
	 Name of the subsidiary
	  	Ownership interest	 	Location
	 Dia Bras EXMIN Resources Inc.
	  	100%	 	Canada
	 Plexmar Resources Inc.
	  	100%	 	Canada
	 Sociedad Minera Corona, S. A. (“Corona”)
1
	  	81.84%	 	Perú
	 Dia Bras Peru, S. A. C. (“Dia Bras Peru”)
1
	  	100%	 	Perú
	 Sociedad Minera San Miguelito, S. A. C.
	  	100%	 	Perú
	 Dia Bras Mexicana, S. A. de C. V. (“Dia Bras Mexicana”)
	  	100%	 	México
	 Servicios de Minería de la Sierra, S. A. de C. V.
	  	100%	 	México
	 Bolívar Administradores, S. A. de C. V.
	  	100%	 	México
	 Exploraciones Mineras Dia Bras, S. A. de C. V.
	  	100%	 	México
	 EXMIN, S. A. de C. V.
	  	100%	 	México

  

	1 	 The Company, through its wholly owned subsidiary Dia Bras Peru, holds an 81.84% interest in Corona, which
represents 92.33% of the voting shares. The Company consolidates Corona’s financial results and records a non-controlling interest for the 18.16% that it does not own. 

  
 55 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	14.	 CRITICAL ACCOUNTING POLICIES AND ESTIMATES 

Significant accounting judgments and estimates 

In the application of the Company’s accounting policies, which are described in note 2 of the Company’s
December 31, 2016 consolidated financial statements, management is required to make judgments, estimates and assumptions about the effects of uncertain future events on the carrying amounts of assets and liabilities. The estimates and
associated assumptions are based on management’s best knowledge of the relevant facts and circumstances and historical experience. Actual results may differ from these estimates; potentially having a material future effect on the Company’s
consolidated financial statements. 
 The estimates and underlying assumptions are reviewed on an ongoing basis. Revisions
to accounting estimates are recognized in the period in which the estimate is revised if the revision affects only that period, or in the period of the revision and future periods if the revision affects both current and future periods. 

The following are the significant judgments that management has made in the process of applying the Company’s accounting
policies and that have the most significant effect on the amounts recognized in the consolidated financial statements: 
  

	 	I.	 Impairment review of asset carrying values 

In accordance with the Company’s accounting policy, at every reporting period, the Company assesses whether there are any
indicators that the carrying value of its assets or CGUs may be impaired, which is a significant management judgment. Where there is an indication that the carrying amount of an asset may not be recoverable, the Company prepares a formal estimate of
the recoverable amount by analyzing discounted cash flows. The resulting valuations are particularly sensitive to changes in estimates such as long term commodity prices, exchange rates, sales volume, operating costs, and discount rates. In the
event of impairment, if there is an adverse change in any of the assumptions or estimates used in the discounted cash flow model, this could result in a further impairment of the asset. Also, in accordance with the Company’s accounting policy,
the Company capitalizes evaluation expenditures when there is a high degree of confidence that these costs are recoverable and have a probable future benefit. As at December 31, 2016, management assessed its mining property assets and
exploration and evaluation expenditures for impairment and determined that no impairment was required. 
  

	 	II.	 Mineral reserves and resources 

The Company estimates mineral reserves and resources based on information prepared by qualified persons as defined in
accordance with the Canadian Securities Administrators’ National Instrument (“NI”) 43-101. These estimates form the basis of the Company’s life of mine (“LOM”) plans, which are used for a number of important and
significant accounting purposes, including: the calculation of depletion expense and impairment charges, forecasting the timing of the payment of decommissioning costs and future taxes. There are significant uncertainties inherent in the estimation
of mineral reserves and the assumptions used which include commodity prices, production costs, recovery rates and exchange rates may change significantly when new information becomes available. Changes in assumptions could result in mineral reserves
being revised, which in turn would impact our depletion expense, asset carrying values and the provision for decommissioning costs. 

  
 56 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	 	III.	 Deferred tax assets and liabilities 

The Company’s management makes significant estimates and judgments in determining the Company’s tax expense for the
period and the deferred tax assets and liabilities. Management interprets tax legislation in a variety of jurisdictions and makes estimates of the expected timing of the reversal of deferred tax assets and liabilities. In addition, management makes
estimates related to expectations of future taxable income based on cash flows from operations and the application of existing tax laws in each jurisdiction. Assumptions used in the cash flow forecast are based on management’s estimates of
future production and sales volume, commodity prices, operating costs, capital expenditures, dividends, and decommissioning and reclamation expenditures. These estimates are subject to risk and uncertainty and could result in an adjustment to the
deferred tax provision and a corresponding credit or charge to the statement of loss. The Company is subject to assessments by the various tax authorities who may interpret the tax laws differently. These differences may impact the final amount or
the timing of the payment of taxes. The Company provides for such differences where known based on management’s best estimates of the probable outcome of these matters. 
  

	 	IV.	 Decommissioning and restoration liabilities costs 

The Company’s provision for decommissioning and restoration costs is based on management’s best estimate of the
present value of the future cash outflows required to settle the liability. In determining the liability, management makes estimates about the future costs, inflation, foreign exchange rates, risks associated with the cash flows, and the applicable
risk-free interest rates for discounting future cash flows. Changes in any of these estimates could result in a change in the provision recognized by the Company. Also, the ultimate costs of environmental disturbance are uncertain and cost estimates
can vary in response to many factors including changes to the relevant legal requirements, the emergence of new restoration techniques or experience at other mine sites. 

Changes in decommissioning and restoration liabilities are recorded with a corresponding change to the carrying amounts of the
assets to which they relate. Adjustments made to the carrying amounts of the asset can result in a change to the depreciation charged in the consolidated statement of loss. 
  

	 	V.	 Functional currency 

The determination of a subsidiary’s functional currency often requires significant judgment where the primary economic
environment in which the subsidiary operates may not be clear. This can have a significant impact on our consolidated results based on the foreign currency translation methods described in the audited consolidated financial statements. 

Future accounting changes 

The following standards and amendments to existing standards have been published and are mandatory for annual periods
beginning January 1, 2018, or later periods: 

  
 57 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 IFRS 9, Financial Instruments: Recognition and measurement (“IFRS
9”) 
 The IASB issued its completed version of IFRS 9, Financial Instruments (“IFRS 9”) in July 2014.
The completed standard provides revised guidance on the recognition and measurement of financial assets and liabilities. It also introduces a new expected credit loss model for calculating impairment for financial assets and liabilities. The new
hedging guidance that was issued in November 2013 is incorporated into this new final standard. 
 This final version of
IFRS 9 will be effective for annual periods beginning on or after January 1, 2018, with early adoption permitted. The Company is currently evaluating the extent of the impact of the adoption of this standard. 

IFRS 15, Revenue from Contracts with Customers (“IFRS 15”) 

IFRS 15, was issued in May 2014, which covers principles for reporting the nature, amount, timing and uncertainty of revenue
and cash flows arising from contracts with customers. IFRS 15 is effective for annual periods beginning on or after January 1, 2018. The Company has not yet determined the potential impact of adopting this standard on its consolidated financial
statements. 
 IFRS 16, Leases (“IFRS 16”) 

In January 2016, the IASB issued this standard which is effective for periods beginning on or after January 1, 2019,
which replaces the current guidance in IAS 17, Leases, and is to be applied either retrospectively or a modified retrospective approach. Early adoption is permitted, but only in conjunction with IFRS 15, Revenue from Contracts with Customers. Under
IAS 17, lessees were required to make a distinction between a finance lease (on balance sheet) and an operating lease (off balance sheet). IFRS 16 now requires lessees to recognize a lease liability reflective of future lease payments and a
“right-of-use asset” for virtually all lease contracts. The Company has not yet determined the effect of adoption of IFRS 16 on its consolidated financial statements. 

Amendments to IAS 7, Statements of Cash Flows (“IAS 7”) 

The amendments require disclosures that enable users of financial statements to evaluate changes in liabilities arising from
financing activities, including both changes arising from cash flow and non-cash changes. The amendments apply prospectively for annual periods beginning on or after January 1, 2017, with earlier application permitted. The Company intends to
adopt the amendments to IAS 7 in its financial statements for the annual period beginning on January 1, 2017. The Company is in the process of determining the impact of the amendments to IAS 7 on its consolidated financial statements. 

  
 58 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	15.	 OFF BALANCE SHEET ARRANGEMENTS 

The Company has no off-balance sheet arrangements as at December 31, 2016. 

 

	16.	 DISCLOSURE CONTROLS AND INTERNAL CONTROLS OVER FINANCIAL REPORTING (“ICFR”)

 Disclosure controls and procedures 

The Company’s management is responsible for designing and maintaining adequate internal controls over financial reporting and disclosure
controls and procedures, under the supervision of the Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), to provide reasonable assurance regarding the reliability of financial reporting and the preparation of
the financial statements in accordance with IFRS. 
 Management, including the CEO and CFO, has evaluated the effectiveness of the design
and operation of our disclosure controls and procedures as at December 31, 2016, as defined in the rules of the Canadian Securities Administration. Based on this evaluation, they concluded that our disclosure controls and procedures are
effective in providing reasonable assurance that the information required to be disclosed in reports we filed or submitted under Canadian securities legislation was recorded, processed, summarized and reported within the time periods specified in
those rules. 
 Internal controls over financial reporting 

Management, including the CEO and CFO, is responsible for establishing and maintaining adequate internal control over financial reporting, and
used the framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) to evaluate the effectiveness of our controls in 2016. Based on this evaluation, management concluded that our internal control over financial
reporting was effective as at December 31, 2016 and provided a reasonable assurance of the reliability of our financial reporting and preparation of the financial statements. 

No matter how well designed any system of internal control has inherent limitations. Even systems determined to be effective can provide only
reasonable assurance of the reliability of financial statement preparation and presentation. 
 Changes in internal controls over financial reporting

 There have been no changes in ICFR during the three months ended December 31, 2016 that have materially affected, or are
reasonably likely to materially affect, ICFR. 

  
 59 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

	17.	 CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS 

This discussion includes certain statements that may be deemed “forward-looking”. All statements in this discussion, other than
statements of historical fact, addressing future exploration drilling, exploration and development activities, production activities and events or developments that the Company expects, are forward looking statements. Although the Company believes
the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those expressed in
forward-looking statements. Factors that could cause actual results to differ materially from those in forward-looking statements include market prices, exploitation and exploration successes, continued availability of capital and financing, general
economic, market or business conditions, and other factors which are discussed under “Risk Factors” in the Company’s Annual Information Form dated March 30, 2016 available at www.sedar.com under the Company’s name. 

The MD&A contains “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform
Act of 1995 and “forward looking information” within Canadian securities laws (collectively “forward-looking statements”) related to the Company and its operations, and in particular, the anticipated developments in the
Company’s operations in future periods, the Company’s planned exploration activities, the adequacy of the Company’s financial resources and other events or conditions that may occur in the future. Statements concerning mineral reserve
and resource estimates may also be deemed to constitute forward-looking statements to the extent that they involve estimates of the mineralization that will be encountered if and when the properties are developed or further developed. These
statements relate to analyses and other information that are based on forecasts of future results, estimates of amounts not yet determinable and assumptions of management. 

These forward-looking statements include, but are not limited to, relate to, among other things: future production of silver, lead, copper and
zinc (the “metals”); future cash costs per ounce or pound of the metals; the price of the metals; the effects of domestic and foreign laws, regulations and government policies and actions affecting the Company’s operations or
potential future operations; future successful development of the Yauricocha, Bolivar and Cusi near-mine exploration projects and other exploration and development projects; the sufficiency of the Company’s current working capital, anticipated
operating cash flow or the Company’s ability to raise necessary funds; estimated production rates for the metals produced by the Company; timing of production; the estimated cost of sustaining capital; ongoing or future development plans and
capital replacement, improvement or remediation programs; the estimates of expected or anticipated economic returns from the Company’s mining projects; future sales of the metals, concentrates or other future products produced by the Company;
and the Company’s plans and expectations for its properties and operations. 
 Risks and uncertainties relating to foreign currency
fluctuations; risks inherent in the mining industry including environmental hazards, industrial accidents, unusual or unexpected geological formations, ground control problems, flooding and mud rushes; risks associated with the estimation of mineral
resources and the geology, grade and continuity of mineral deposits; the possibility that future exploration, development or mining results will not be consistent with the Company’s expectations; the potential for and effects of labour disputes
or other unanticipated difficulties or shortages of labour or interruptions in production; actual material mined varying from estimates of grade, tonnage, dilution and metallurgical and other characteristics; the inherent

  
 60 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
uncertainty of pilot-mining activities and cost estimates, including the potential for unexpected costs/expenses and commodity price fluctuations; uncertain political and economic environments;
changes in laws or policies, foreign taxation, delays or the inability to obtain necessary governmental permits. 
 Any statements that
express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as “expects”,
“anticipates”, “plans”, “projects”, “estimates”, “assumes”, “intends”, “strategy”, “goals”, “objectives”, “potential” or variations thereof, or
stating that certain actions, events or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved, or the negative of any of these terms and similar expressions) are not
statements of historical fact and may be forward-looking information. Forward-looking information is subject to a variety of known and unknown risks, uncertainties and other factors that could cause actual events or results to differ from those
expressed or implied by the forward-looking information, including, without limitation: uncertainty of production and cost estimates for the Yauricocha Mine (as hereinafter defined), the Bolivar Mine (as hereinafter defined) and the Cusi Mine (as
hereinafter defined); uncertainty of production at the Company’s exploration and development properties; risks and uncertainties associated with developing and exploring new mines including start-up delays; risks and hazards associated with the
business of mineral exploration, development and mining (including operating in foreign jurisdictions, environmental hazards, industrial accidents, unusual or unexpected geological or structure formations, pressures, cave-ins and flooding); risks
and uncertainties relating to the interpretation of drill results and the geology, grade and continuity of the Company’s mineral deposits; risks related to the Company’s ability to obtain adequate financing for the Company’s planned
development activities and to complete further exploration programs; fluctuations in spot and forward markets for the metals and certain other commodities; risks related to obtaining long-term sales contracts or completing spot sales for the
Company’s products; the Company’s history of losses and the potential for future losses; risks related to general economic conditions, including recent market and world events and conditions; inadequate insurance, or inability to obtain
insurance, to cover these risks and hazards; relationships with and claims by local communities and indigenous populations; diminishing quantities or grades of mineral reserves as properties are mined; challenges to, or difficulty maintaining, the
Company’s title to properties and continued ownership thereof; risks related to the Company’s covenants with respect to the BCP Facility (as hereinafter defined); changes in national and local legislation, taxation, controls or regulations
and political or economic developments or changes in Canada, Mexico, Peru or other countries where they may carry on business; risks related to the delay in obtaining or failure to obtain required permits, or non-compliance with permits the Company
has obtained; increased costs and restrictions on operations due to compliance with environmental laws and regulations; regulations and pending legislation governing issues involving climate change, as well as the physical impacts of climate change;
risks related to reclamation activities on the Company’s properties; uncertainties related to title to the Company’s mineral properties and the surface rights thereon, including the Company’s ability to acquire, or economically
acquire, the surface rights to certain of the Company’s exploration and development projects; the Company’s ability to successfully acquire additional commercially mineable mineral rights; risks related to currency fluctuations (such as
the Canadian dollar, the United States dollar, the Peruvian sol and the Mexican peso); increased costs affecting the mining industry, including occasional high rates of inflation; increased competition in the mining industry for properties,
qualified personnel and management; risks related to some of the Company’s directors’ and officers’ involvement with other natural resource companies; the Company’s ability to attract and retain qualified personnel and management
to 

  
 61 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 

For the year ended December 31, 2016 
 (In
thousands of United States dollars, unless otherwise stated) 
  
  

 
grow the Company’s business; risks related to estimates of deferred tax assets and liabilities; risks related to claims and legal proceedings and the Company’s ability to maintain
adequate internal control over financial reporting. 
 This list is not exhaustive of the factors that may affect any of the Company’s
forward-looking statements. Forward looking statements are statements about the future and are inherently uncertain, and the Company’s actual achievements or other future events or conditions may differ materially from those reflected in the
forward-looking statements due to a variety of risks, uncertainties and other factors, including, without limitation, those referred to in this MD&A under the heading “Other Risks and Uncertainties”. The Company’s forward-looking
statements are based on the beliefs, expectations and opinions of management on the date the statements are made, and the Company does not assume any obligation to update forward-looking statements if circumstances or management’s beliefs,
expectations or opinions should change, other than as required by applicable law. For the reasons set forth above, one should not place undue reliance on forward-looking statements. 

Cautionary Note to U.S. Investors Concerning Estimates of Inferred Resources 

This document uses the term “Inferred Mineral Resources”. U.S. investors are advised that while this term is recognized and required
by Canadian regulations, the Securities and Exchange Commission (“SEC”) does not recognize it. Inferred Mineral Resources have a great amount of uncertainty as to their existence, and great uncertainty as to their economic and legal
feasibility. It cannot be assumed that all or any part of an Inferred Mineral Resource will ever be upgraded to a higher category. Under Canadian rules, estimates of Inferred Mineral Resources may not form the basis of economic studies other than a
Preliminary Economic Assessment (PEA). 
 This document also uses the terms “Measured and Indicated Mineral Resources”. The
Company advises U.S. investors that while these terms are recognized by Canadian regulations, the SEC does not recognize them. U.S. investors are cautioned not to assume that any part or all of mineral deposits included in these categories will ever
be converted into mineral reserves. Mineral resources that are not mineral reserves do not have demonstrated economic viability. Disclosure of “contained ounces” is permitted under Canadian regulations; however, the SEC normally only
permits the reporting of non-reserve mineralization as in-place tonnage and grade. 

  
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