MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS (Continued) Our overall gross margin percentage decreased to 59.8% in 2013 from 62.1% in 2012.
The decrease in the gross margin percentage was primarily due to the gross margin percentage decrease in PCCG.
We derived most of our overall gross margin dollars in 2013 and 2012 from the sale of platforms in the PCCG and DCG operating segments.
Our net revenue for 2012, which included 52 weeks, decreased by $658 million, or 1%, compared to 2011, which included 53 weeks.
The PCCG and DCG platform unit sales decreased 1% while average selling prices were unchanged.
Additionally, lower netbook platform unit sales and Multi-Comm average selling prices, primarily discrete modems, contributed to the decrease.
These decreases were partially offset by our McAfee operating segment, which we acquired in the Q1 2011.
McAfee contributed $469 million of additional revenue in 2012 compared to 2011.
Our overall gross margin dollars for 2012 decreased by $606 million, or 2%, compared to 2011.
The decrease was due in large part to $494 million of excess capacity charges, as well as lower revenue from the PCCG and DCG platform.
To a lesser extent, approximately $390 million of higher unit costs on the PCCG and DCG platform as well as lower netbook and Multi-Comm revenue contributed to the decrease.
The decrease was partially offset by $643 million of lower factory start-up costs as we transition from our 22nm process technology to R&D of our nextgeneration 14nm process technology, as well as $422 million of charges recorded in 2011 to repair and replace materials and systems impacted by a design issue related to our Intel?6 Series Express Chipset family.
The decrease was also partially offset by the two additional months of results from our acquisition of McAfee, which occurred on February 28, 2011, contributing approximately $334 million of additional gross margin dollars in 2012 compared to 2011.
The amortization of acquisition-related intangibles resulted in a $557 million reduction to our overall gross margin dollars in 2012, compared to $482 million in 2011, primarily due to acquisitions completed in Q1 2011.
Our overall gross margin percentage in 2012 was flat from 2011 as higher excess capacity charges and higher unit costs on the PCCG and DCG platform were offset by lower factory start-up costs and no impact in 2012 for a design issue related to our Intel 6 Series Express Chipset family.
We derived a substantial majority of our overall gross margin dollars in 2012 and 2011 from the sale of platforms in the PCCG and DCG operating segments.
PC Client Group The revenue and operating income for the PCCG operating segment for each period were as follows:
## Table 0 ##
Net revenue for the PCCG operating segment decreased by $1.5 billion, or 4%, in 2013 compared to 2012.
PCCG platform unit sales were down 3% primarily on softness in traditional PC demand during the first nine months of the year.
The decrease in revenue was driven by lower notebook and desktop platform unit sales which were down 4% and 2%, respectively.
PCCG platform average selling prices were flat, with 6% higher desktop platform average selling prices offset by 4% lower notebook platform average selling prices.
Operating income decreased by $1.3 billion, or 10%, in 2013 compared to 2012, which was driven by $1.5 billion of lower gross margin, partially offset by $200 million of lower operating expenses.
The decrease in gross margin was driven by $1.5 billion of higher factory start-up costs primarily on our next-generation 14nm process technology as well as lower PCCG platform revenue.
These decreases were partially offset by approximately $520 million of lower PCCG platform unit costs, $260 million of lower excess capacity charges, and higher sell-through of previously nonqualified units.
Net revenue for the PCCG operating segment decreased by $1.1 billion, or 3%, in 2012 compared to 2011.
PCCG revenue was negatively impacted by the growth of tablets as these devices compete with PCs for consumer sales.
Platform average selling prices and unit sales decreased 2% and 1%, respectively.
The decrease was driven by 6% lower notebook platform average selling prices and 5% lower desktop platform unit sales.
These decreases were partially offset by a 4% increase in desktop platform average selling prices and a 2% increase in notebook platform unit sales.
MetLife, Inc.  Notes to the Consolidated Financial Statements — (Continued) The Company held non-income producing fixed maturity securities with an estimated fair value of $62 million and $130 million with unrealized gains (losses) of ($19) million and ($23) million at December 31, 2011 and 2010, respectively.
The Company held foreign currency derivatives with notional amounts of $15.3 billion and $12.2 billion to hedge the exchange rate risk associated with foreign denominated fixed maturity securities at December 31, 2011 and 2010, respectively.
Concentrations of Credit Risk (Fixed Maturity Securities) — Summary.
The following section contains a summary of the concentrations of credit risk related to fixed maturity securities holdings.
The Company was not exposed to any concentrations of credit risk of any single issuer greater than 10% of the Company’s equity, other than the government securities summarized in the table below.
The par value, amortized cost and estimated fair value of holdings in sovereign fixed maturity securities of Portugal, Ireland, Italy, Greece and Spain, commonly referred to as “Europe’s perimeter region,” was $874 million, $254 million and $264 million at December 31, 2011, respectively, and $1.9 billion, $1.6 billion and $1.6 billion at December 31, 2010, respectively.
The estimated fair value of these Europe perimeter region sovereign fixed maturity securities represented 0.4% and 3.2% of the Company’s equity at December 31, 2011 and 2010, respectively, and 0.1% and 0.3% of total cash and invested assets at December 31, 2011 and 2010, respectively.
Concentrations of Credit Risk (Government and Agency Securities).
The following section contains a summary of the concentrations of credit risk related to government and agency fixed maturity and fixed-income securities holdings, which were greater than 10% of the Company’s equity at
## Table 1 ##
(1) Represents estimated fair value for fixed maturity securities, and for short-term investments and cash equivalents, estimated fair value or amortized cost, which approximates estimated fair value.
(2) The Company’s investment in Mexico government and agency fixed maturity securities at December 31, 2011 of $5.0 billion is less than 10% of the Company’s equity.
Concentrations of Credit Risk (Equity Securities).
The Company was not exposed to any concentrations of credit risk in its equity securities holdings of any single issuer greater than 10% of the Company’s equity or 1% of total investments at December 31, 2011 and 2010.
Maturities of Fixed Maturity Securities.
The amortized cost and estimated fair value of fixed maturity securities, by contractual maturity date (excluding scheduled sinking funds), were as follows a
## Table 2 ##
Actual maturities may differ from contractual maturities due to the exercise of call or prepayment options.
Fixed maturity securities not due at a single maturity date have been included in the above table in the year of final contractual maturity.
RMBS, CMBS and ABS are shown separately in the table, as they are not due at a single maturity.
As discussed further in Note 2, an indemnification asset has been established in connection with certain investments acquired from American Life.
Evaluating Available-for-Sale Securities for Other-Than-Temporary Impairment As described more fully in Note 1, the Company performs a regular evaluation, on a security-by-security basis, of its available-for-sale securities holdings, including fixed maturity securities, equity securities and perpetual hybrid securities, in accordance with its impairment policy in order to evaluate whether such investments are other-than-temporarily impaired
‰ Net unrealized investment gains (losses); ‰ Continuous gross unrealized losses and OTTI losses for fixed maturity and equity securities available-for-sale by sector; ‰ Aging of gross unrealized losses and OTTI losses for fixed maturity and equity securities available-for-sale; ‰ Concentration of gross unrealized losses and OTTI losses for fixed maturity and equity securities available-for-sale; and ‰ Evaluating temporarily impaired available-for-sale securities.
Trading and Other Securities The Company has a trading securities portfolio, principally invested in fixed maturity securities, to support investment strategies that involve the active and frequent purchase and sale of securities (“Actively Traded Securities”) and the execution of short sale agreements.
Trading and other securities also include securities for which the FVO has been elected (“FVO Securities”).
FVO Securities include certain fixed maturity and equity securities held for investment by the general account to support asset and liability matching strategies for certain insurance products.
FVO Securities also include contractholder-directed investments supporting unit-linked variable annuity type liabilities which do not qualify for presentation as separate account summary total assets and liabilities.
These investments are primarily mutual funds and, to a lesser extent, fixed maturity and equity securities, short-term investments and cash and cash equivalents.
The investment returns on these investments inure to contractholders and are offset by a corresponding change in PABs through interest credited to policyholder account balances.
FVO Securities also include securities held by CSEs (former qualifying special purpose entities).
Trading and other securities were $18.3 billion and $18.6 billion at estimated fair value, or 3.5% and 3.9% of total cash and invested assets, at December 31, 2011 and 2010, respectively.
See Note 3 of the Notes to the Consolidated Financial Statements for tables which present information about the Actively Traded Securities and FVO Securities, related short sale agreement liabilities and investments pledged to secure short sale agreement liabilities at December 31, 2011 and 2010.
Trading and other securities and trading (short sale agreement) liabilities, measured at estimated fair value on a recurring basis and their corresponding fair value hierarchy, are presented as follows:
## Table 3 ##
A rollforward of the fair value measurements for trading and other securities measured at estimated fair value on a recurring basis using significant unobservable (Level 3) inputs for the year ended December 31, 2011, is as follows:

Tables referenced above, in order (Table 0 first):
<table><tr><td>(In Millions)</td><td>2013</td><td>2012</td><td>2011</td></tr><tr><td>Net revenue</td><td>$33,039</td><td>$34,504</td><td>$35,624</td></tr><tr><td>Operating income</td><td>$11,827</td><td>$13,106</td><td>$14,840</td></tr></table>
<table><tr><td></td><td colspan="2"> December 31,</td></tr><tr><td></td><td> 2011</td><td> 2010</td></tr><tr><td></td><td colspan="2"> Carrying Value -1</td></tr><tr><td></td><td colspan="2"> (In millions)</td></tr><tr><td>Government and agency fixed maturity securities:</td><td></td><td></td></tr><tr><td>United States</td><td>$40,012</td><td>$33,304</td></tr><tr><td>Japan</td><td>$21,003</td><td>$15,591</td></tr><tr><td>Mexico -2</td><td>$—</td><td>$5,050</td></tr><tr><td>U.S. Treasury and agency fixed-income securities included in:</td><td></td><td></td></tr><tr><td>Short-term investments</td><td>$15,775</td><td>$4,048</td></tr><tr><td>Cash equivalents</td><td>$1,748</td><td>$5,762</td></tr></table>
<table><tr><td></td><td colspan="4"> December 31,</td></tr><tr><td></td><td colspan="2"> 2011</td><td colspan="2"> 2010</td></tr><tr><td></td><td> Amortized Cost</td><td> Estimated Fair  Value</td><td> Amortized Cost</td><td> Estimated Fair  Value</td></tr><tr><td></td><td colspan="4"> (In millions)</td></tr><tr><td>Due in one year or less</td><td>$16,747</td><td>$16,862</td><td>$8,580</td><td>$8,702</td></tr><tr><td>Due after one year through five years</td><td>62,819</td><td>64,414</td><td>65,143</td><td>66,796</td></tr><tr><td>Due after five years through ten years</td><td>82,694</td><td>88,036</td><td>76,508</td><td>79,571</td></tr><tr><td>Due after ten years</td><td>93,876</td><td>106,274</td><td>87,983</td><td>90,033</td></tr><tr><td>Subtotal</td><td>256,136</td><td>275,586</td><td>238,214</td><td>245,102</td></tr><tr><td>RMBS, CMBS and ABS</td><td>73,675</td><td>74,685</td><td>79,403</td><td>79,695</td></tr><tr><td>Total fixed maturity securities</td><td>$329,811</td><td>$350,271</td><td>$317,617</td><td>$324,797</td></tr></table>
<table><tr><td></td><td colspan="4"> December 31, 2011</td></tr><tr><td></td><td colspan="2">Trading and Other Securities</td><td colspan="2"> Trading  Liabilities</td></tr><tr><td></td><td colspan="4"> (In millions)</td></tr><tr><td>Quoted prices in active markets for identical assets and liabilities (Level 1)</td><td>$7,572</td><td>41%</td><td>$124</td><td>98%</td></tr><tr><td>Significant other observable inputs (Level 2)</td><td>9,287</td><td>51</td><td>3</td><td>2</td></tr><tr><td>Significant unobservable inputs (Level 3)</td><td>1,409</td><td>8</td><td>—</td><td>—</td></tr><tr><td>Total estimated fair value</td><td>$18,268</td><td>100%</td><td>$127</td><td>100%</td></tr></table>

Question: In which section the sum of United States has the highest value?
Answer: 2011