The security-level assessment is performed on each security, regardless of the classification of the security as available for sale or held to maturity.
Our assessment considers the security structure, recent security collateral performance metrics if applicable, external credit ratings, failure of the issuer to make scheduled interest or principal payments, our judgment and expectations of future performance, and relevant independent industry research, analysis and forecasts.
Results of the periodic assessment are reviewed by a cross-functional senior management team representing Asset & Liability Management, Finance, and Market Risk Management.
The senior management team considers the results of the assessments, as well as other factors, in determining whether the impairment is other-than-temporary.
For debt securities, a critical component of the evaluation for OTTI is the identification of credit-impaired securities, where management does not expect to receive cash flows sufficient to recover the entire amortized cost basis of the security.
The paragraphs below describe our process for identifying credit impairment for our most significant categories of securities not backed by the US government or its agencies.
Non-Agency Residential Mortgage-Backed Securities and Asset-Backed Securities Collateralized by First-Lien and Second-Lien Non-Agency Residential Mortgage Loans Potential credit losses on these securities are evaluated on a security by security basis.
Collateral performance assumptions are developed for each security after reviewing collateral composition and collateral performance statistics.
This includes analyzing recent delinquency roll rates, loss severities, voluntary prepayments, and various other collateral and performance metrics.
This information is then combined with general expectations on the housing market, employment, and other economic factors to develop estimates of future performance.
Security level assumptions for prepayments, loan defaults, and loss given default are applied to every security using a thirdparty cash flow model.
The third-party cash flow model then generates projected cash flows according to the structure of each security.
Based on the results of the cash flow analysis, we determine whether we will recover the amortized cost basis of our security.
The following table provides detail on the significant assumptions used to determine credit impairment for nonagency residential mortgage-backed and asset-backed securities collateralized by first-lien and second-lien nonagency residential mortgage loans.
Table 85: Credit Impairment Assessment Assumptions— Non-Agency Residential Mortgage-Backed and AssetBacked Securities (a)
## Table 0 ##
(a) Collateralized by first and second-lien non-agency residential mortgage loans.
(b) Calculated by weighting the relevant assumption for each individual security by the current outstanding cost basis of the security.
Non-Agency Commercial Mortgage-Backed Securities Credit losses on these securities are measured using propertylevel cash flow projections and forward-looking property valuations.
Cash flows are projected using a detailed analysis of net operating income (NOI) by property type which, in turn, is based on the analysis of NOI performance over the past several business cycles combined with PNC’s economic outlook for the current cycle.
Loss severities are based on property price projections, which are calculated using capitalization rate projections.
The capitalization rate projections are based on a combination of historical capitalization rates and expected capitalization rates implied by current market activity, our outlook and relevant independent industry research, analysis and forecasts.
Securities exhibiting weaker performance within the model are subject to further analysis.
This analysis is performed at the loan level, and includes assessing local market conditions, reserves, occupancy, rent rolls and master/special servicer details.
therefore a concession has been granted based upon discharge from personal liability.
Charge-offs have been taken where the fair value less costs to sell the collateral was less than the recorded investment of the loan and were $128.1 million.
Of these loans, approximately 78% were current on their payments at December 31, 2012.
(f) Includes TDRs of $1,589 million at December 31, 2012, $1,141 million at December 31, 2011, $784 million at December 31, 2010, $440 million at December 31, 2009, and zero at December 31, 2008, respectively.
Nonperforming loans exclude certain government insured or guaranteed loans, loans held for sale, loans accounted for under the fair value option and purchased impaired loans.
(g) OREO excludes $380 million, $280 million, $178 million, $112 million and $81 million at December 31, 2012, December 31, 2011, December 31, 2010, December 31, 2009 and December 31, 2008, respectively, related to residential real estate that was acquired by us upon foreclosure of serviced loans because they are insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA).
(h) Amounts include certain government insured or guaranteed consumer loans totaling $2,236 million, $2,474 million, $2,167 million, $1,814 million and $926 million at December 31, 2012, December 31, 2011, December 31, 2010, December 31, 2009 and December 31, 2008, respectively.
Past due loan amounts exclude purchased impaired loans as they are considered current loans due to the accretion of interest income.
(i) Amounts include certain government insured or guaranteed consumer loans held for sale totaling zero, $15 million, $22 million, $27 million and zero at December 31, 2012, December 31, 2011, December 31, 2010, December 31, 2009 and December 31, 2008, respectively
## Table 1 ##
(a) Includes home equity, credit card and other consumer.
(b) Amount for 2008 included a $504 million conforming provision for credit losses related to National City
INVESTMENT SECURITIES Table 11: Details of Investment Securities
## Table 2 ##
(a) Includes $367 million of both amortized cost and fair value of securities classified as corporate stocks and other at December 31, 2012.
Comparably, at December 31, 2011, the amortized cost and fair value of corporate stocks and other was $368 million.
The remainder of securities available for sale were debt securities.
The carrying amount of investment securities totaled $61.4 billion at December 31, 2012, which was made up of $51.0 billion of securities available for sale carried at fair value and $10.4 billion of securities held to maturity carried at amortized cost.
Comparably, at December 31, 2011, the carrying value of investment securities totaled $60.6 billion of which $48.6 billion represented securities available for sale carried at fair value and $12.0 billion of securities held to maturity carried at amortized cost.
The increase in carrying amount between the periods primarily reflected an increase of $2.0 billion in available for sale asset-backed securities, which was primarily due to net purchase activity, and an increase of $.6 billion in available for sale non-agency residential mortgage-backed securities due to increases in fair value at December 31, 2012.
These increases were partially offset by a $1.7 billion decrease in held to maturity debt securities due to principal payments.
Investment securities represented 20% of total assets at December 31, 2012 and 22% at December 31, 2011.
We evaluate our portfolio of investment securities in light of changing market conditions and other factors and, where appropriate, take steps intended to improve our overall positioning.
We consider the portfolio to be well-diversified and of high quality.
U. S.  Treasury and government agencies, agency residential mortgage-backed and agency commercial mortgage-backed securities collectively represented 59% of the investment securities portfolio at December 31, 2012.
At December 31, 2012, the securities available for sale portfolio included a net unrealized gain of $1.6 billion, which represented the difference between fair value and amortized cost.
The comparable amount at December 31, 2011 was a net unrealized loss of $41 million.
The fair value of investment securities is impacted by interest rates, credit spreads, market volatility and liquidity conditions.
The fair value of investment securities generally decreases when interest rates increase and vice versa.
In addition, the fair value generally decreases when credit spreads widen and vice versa.
The improvement in the net unrealized gain as compared with a loss at December 31, 2011 was primarily due to improvement in the value of non-agency residential mortgagebacked securities, which had a decrease in net unrealized losses of $1.1 billion, and lower market interest rates.
Net unrealized gains and losses in the securities available for sale portfolio are included in Shareholders’ equity as Accumulated other comprehensive income or loss from continuing operations, net of tax, on our Consolidated Balance Sheet.
Additional information regarding our investment securities is included in Note 8 Investment Securities and Note 9 Fair Value in our Notes To Consolidated Financial Statements included in Item 8 of this Report.
Unrealized gains and losses on available for sale securities do not impact liquidity or risk-based capital under currently effective capital rules.
However, reductions in the credit ratings of these securities could have an impact on the liquidity of the securities or the determination of riskweighted assets which could reduce our regulatory capital ratios under currently effective capital rules.
In addition, the amount representing the credit-related portion of OTTI on available for sale securities would reduce our earnings and regulatory capital ratios.
The expected weighted-average life of investment securities (excluding corporate stocks and other) was 4.0 years at December 31, 2012 and 3.7 years at December 31, 2011.
We estimate that, at December 31, 2012, the effective duration of investment securities was 2.3 years for an immediate 50 basis points parallel increase in interest rates and 2.2 years for an immediate 50 basis points parallel decrease in interest rates.
Comparable amounts at December 31, 2011 were 2.6 years and 2.4 years, respectively.
The following table provides detail regarding the vintage, current credit rating, and FICO score of the underlying collateral at origination, where available, for residential mortgage-backed, commercial mortgage-backed and other asset-backed securities held in the available for sale and held to maturity portfolios:

Tables referenced above, in order (Table 0 first):
<table><tr><td>December 31, 2012</td><td>Range</td><td>Weighted-average (b)</td></tr><tr><td>Long-term prepayment rate (annual CPR)</td><td></td><td></td></tr><tr><td>Prime</td><td>7 - 20%</td><td>14%</td></tr><tr><td>Alt-A</td><td>5 - 12</td><td>6</td></tr><tr><td>Option ARM</td><td>3 - 6</td><td>3</td></tr><tr><td>Remaining collateral expected to default</td><td></td><td></td></tr><tr><td>Prime</td><td>0 - 51%</td><td>19%</td></tr><tr><td>Alt-A</td><td>2 - 61</td><td>33</td></tr><tr><td>Option ARM</td><td>19 - 73</td><td>52</td></tr><tr><td>Loss severity</td><td></td><td></td></tr><tr><td>Prime</td><td>25 - 72%</td><td>46%</td></tr><tr><td>Alt-A</td><td>30 - 85</td><td>60</td></tr><tr><td>Option ARM</td><td>40 - 70</td><td>60</td></tr></table>
<table><tr><td>Year ended December 31 – dollars in millions</td><td>2012</td><td>2011</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>Allowance for loan and lease losses – January 1</td><td>$4,347</td><td>$4,887</td><td>$5,072</td><td>$3,917</td><td>$830</td></tr><tr><td>Charge-offs</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Commercial</td><td>-474</td><td>-700</td><td>-1,227</td><td>-1,276</td><td>-301</td></tr><tr><td>Commercial real estate</td><td>-314</td><td>-464</td><td>-670</td><td>-510</td><td>-165</td></tr><tr><td>Equipment lease financing</td><td>-16</td><td>-35</td><td>-120</td><td>-149</td><td>-3</td></tr><tr><td>Consumer (a)</td><td>-956</td><td>-912</td><td>-1,069</td><td>-961</td><td>-143</td></tr><tr><td>Residential real estate</td><td>-110</td><td>-153</td><td>-406</td><td>-259</td><td>-6</td></tr><tr><td>Total charge-offs</td><td>-1,870</td><td>-2,264</td><td>-3,492</td><td>-3,155</td><td>-618</td></tr><tr><td>Recoveries</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Commercial</td><td>300</td><td>332</td><td>294</td><td>181</td><td>53</td></tr><tr><td>Commercial real estate</td><td>115</td><td>105</td><td>77</td><td>38</td><td>10</td></tr><tr><td>Equipment lease financing</td><td>30</td><td>50</td><td>56</td><td>27</td><td>1</td></tr><tr><td>Consumer (a)</td><td>137</td><td>127</td><td>110</td><td>105</td><td>15</td></tr><tr><td>Residential real estate</td><td>-1</td><td>11</td><td>19</td><td>93</td><td></td></tr><tr><td>Total recoveries</td><td>581</td><td>625</td><td>556</td><td>444</td><td>79</td></tr><tr><td>Net charge-offs</td><td>-1,289</td><td>-1,639</td><td>-2,936</td><td>-2,711</td><td>-539</td></tr><tr><td>Provision for credit losses (b)</td><td>987</td><td>1,152</td><td>2,502</td><td>3,930</td><td>1,517</td></tr><tr><td>Acquired allowance – National City</td><td></td><td></td><td></td><td>-112</td><td>2,224</td></tr><tr><td>Other</td><td>1</td><td>-1</td><td></td><td></td><td>20</td></tr><tr><td>Adoption of ASU 2009-17,<i>Consolidations</i></td><td></td><td></td><td>141</td><td></td><td></td></tr><tr><td>Net change in allowance for unfunded loan commitments and letters ofcredit</td><td>-10</td><td>-52</td><td>108</td><td>48</td><td>-135</td></tr><tr><td>Allowance for loan and lease losses – December 31</td><td>$4,036</td><td>$4,347</td><td>$4,887</td><td>$5,072</td><td>$3,917</td></tr><tr><td>Allowance as a percent of December 31:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Loans</td><td>2.17%</td><td>2.73%</td><td>3.25%</td><td>3.22%</td><td>2.23%</td></tr><tr><td>Nonperforming loans</td><td>124</td><td>122</td><td>109</td><td>89</td><td>236</td></tr><tr><td>As a percent of average loans</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net charge-offs</td><td>.73</td><td>1.08</td><td>1.91</td><td>1.64</td><td>.74</td></tr><tr><td>Provision for credit losses</td><td>.56</td><td>.76</td><td>1.63</td><td>2.37</td><td>2.09</td></tr><tr><td>Allowance for loan and lease losses</td><td>2.28</td><td>2.86</td><td>3.18</td><td>3.06</td><td>5.38</td></tr><tr><td>Allowance as a multiple of net charge-offs</td><td>3.13x</td><td>2.65x</td><td>1.66x</td><td>1.87x</td><td>7.27x</td></tr></table>
<table><tr><td></td><td>December 31, 2012</td><td>December 31, 2011</td></tr><tr><td>In millions</td><td>Amortized Cost</td><td>Fair Value</td><td>Amortized Cost</td><td>Fair Value</td></tr><tr><td>Total securities available for sale (a)</td><td>$49,447</td><td>$51,052</td><td>$48,609</td><td>$48,568</td></tr><tr><td>Total securities held to maturity</td><td>10,354</td><td>10,860</td><td>12,066</td><td>12,450</td></tr><tr><td>Total securities</td><td>$59,801</td><td>$61,912</td><td>$60,675</td><td>$61,018</td></tr></table>

Question: In the year with lowest amount of Commercial, what's the increasing rate of Consumer (a)?
Answer: 0.8512
Reasoning program: subtract(-961,-143), divide(#0,-961)