Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies We are a stockholder-owned corporation organized and existing under the Federal National Mortgage Association Charter Act (the “Charter Act” or our “charter”). We are a government-sponsored enterprise (“GSE”), and we are subject to government oversight and regulation. Our regulators include the Federal Housing Finance Agency (“FHFA”), the U.S. Department of Housing and Urban Development (“HUD”), the U.S. Securities and Exchange Commission (“SEC”), and the U.S. Department of the Treasury (“Treasury”). The U.S. government does not guarantee our securities or other obligations. We have been under conservatorship, with FHFA acting as conservator, since September 6, 2008. See below and “Note 1, Summary of Significant Accounting Policies” in our annual report on Form 10-K for the year ended December 31, 2018 (“2018 Form 10-K”) for additional information on our conservatorship and the impact of U.S. government support of our business. The unaudited interim condensed consolidated financial statements as of and for the three and six months ended June 30, 2019 and related notes, should be read in conjunction with our audited consolidated financial statements and related notes included in our 2018 Form 10-K. Basis of Presentation The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial information and with the SEC’s instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and note disclosures required by GAAP for complete consolidated financial statements. In the opinion of management, all adjustments of a normal recurring nature considered necessary for a fair presentation have been included. The accompanying condensed consolidated financial statements include our accounts as well as the accounts of other entities in which we have a controlling financial interest. All intercompany accounts and transactions have been eliminated. To conform to our current period presentation, we have reclassified certain amounts reported in our prior period condensed consolidated financial statements. Results for the three and six months ended June 30, 2019 may not necessarily be indicative of the results for the year ending December 31, 2019. Use of Estimates Preparing condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect our reported amounts of assets and liabilities, disclosure of contingent assets and liabilities as of the dates of our condensed consolidated financial statements, as well as our reported amounts of revenues and expenses during the reporting periods. Management has made significant estimates in a variety of areas including, but not limited to, the allowance for loan losses. Actual results could be different from these estimates. Conservatorship On September 7, 2008, the Secretary of the Treasury and the Director of FHFA announced several actions taken by Treasury and FHFA regarding Fannie Mae, which included: (1) placing us in conservatorship and (2) the execution of a senior preferred stock purchase agreement by our conservator, on our behalf, and Treasury, pursuant to which we issued to Treasury both senior preferred stock and a warrant to purchase common stock. There continues to be significant uncertainty regarding our future, including how long we will continue to exist in our current form, the extent of our role in the market, how long we will be in conservatorship, what form we will have and what ownership interest, if any, our current common and preferred stockholders will hold in us after the conservatorship is terminated and whether we will continue to exist following conservatorship. Treasury has made a commitment under the senior preferred stock purchase agreement to provide funding to us under certain circumstances if we have a net worth deficit. We are not aware of any plans of FHFA to fundamentally change our business model or reduce the aggregate amount available to or held by the company under our capital structure, which includes the senior preferred stock purchase agreement, in the near term. Senior Preferred Stock Purchase Agreement and Senior Preferred Stock Treasury has made a commitment under the senior preferred stock purchase agreement to provide funding to us under certain circumstances if we have a net worth deficit. Pursuant to the senior preferred stock purchase agreement, we have received a total of $119.8 billion from Treasury as of June 30, 2019, and the amount of remaining funding available to us under the agreement was $113.9 billion. Pursuant to the senior preferred stock purchase agreement, we issued shares of senior preferred stock to Treasury in 2008. Acting as successor to the rights, titles, powers and privileges of the Board, our conservator has declared and directed us to pay dividends to Treasury on the senior preferred stock on a quarterly basis for every dividend period for which dividends were payable since we entered conservatorship in 2008. The current dividend provisions of the senior preferred stock provide for quarterly dividends consisting of the amount, if any, by which our net worth as of the end of the immediately preceding fiscal quarter exceeds a $3.0 billion capital reserve amount. We refer to this as a “net worth sweep” dividend. On June 28, 2019, we paid Treasury a dividend of $2.4 billion based on our net worth of $5.4 billion as of March 31, 2019, less the applicable capital reserve amount of $3.0 billion. Because we had a net worth of $6.4 billion as of June 30, 2019, we expect to pay Treasury a dividend of $3.4 billion for the third quarter of 2019 by September 30, 2019. The liquidation preference of the senior preferred stock is subject to adjustment. The aggregate liquidation preference of the senior preferred stock was $123.8 billion as of June 30, 2019. See “Note 11, Equity (Deficit)” in our 2018 Form 10-K for additional information about the senior preferred stock purchase agreement and the senior preferred stock. Principles of Consolidation Our condensed consolidated financial statements include our accounts as well as the accounts of the other entities in which we have a controlling financial interest. All intercompany balances and transactions have been eliminated. The typical condition for a controlling financial interest is ownership of a majority of the voting interests of an entity. A controlling financial interest may also exist in entities through arrangements that do not involve voting interests, such as a variable interest entity (“VIE”). Single Security Initiative The Single Security Initiative is a joint initiative among Fannie Mae, Freddie Mac, and our jointly owned limited liability company, Common Securitization Solutions, LLC (“CSS”), under the direction of FHFA, to develop a single common mortgage-backed security issued by both Fannie Mae and Freddie Mac to finance fixed-rate mortgage loans backed by one- to four-unit single-family properties. The objective of the Single Security Initiative is to enhance the overall liquidity of Fannie Mae and Freddie Mac mortgage-backed securities eligible for trading in the to-be-announced (“TBA”) market by supporting their fungibility without regard to which company is the issuer. We and Freddie Mac began issuing uniform mortgage-backed securities (“UMBS”) pursuant to the Single Security Initiative in June 2019. We and Freddie Mac also began resecuritizing UMBS certificates into structured securities in June 2019. The structured securities backed by UMBS that we may issue include Supers, which are single-class resecuritization transactions, and Real Estate Mortgage Investment Conduit securities (“REMICs”) and interest-only and principal-only strip securities (“SMBS”), which are multi-class resecuritization transactions. Beginning in June 2019 and going forward, we may include UMBS, Supers and other structured securities issued by Freddie Mac in our resecuritization trusts. The mortgage loans that serve as collateral for Freddie Mac-issued UMBS are not held in trusts that are consolidated by Fannie Mae. When we include Freddie Mac securities in our structured securities we are subject to additional credit risk because we guarantee securities that were not previously guaranteed by Fannie Mae. However, Freddie Mac continues to guarantee the payment of principal and interest on the underlying Freddie Mac securities that we have resecuritized. As such, we have concluded that this additional credit risk is negligible because of the funding commitment available to Freddie Mac through its senior preferred stock purchase agreement with Treasury. Prior to the implementation of the Single Security Initiative, the vast majority of underlying assets of our resecuritization trusts were limited to Fannie Mae securities that were collateralized by mortgage loans held in consolidated trusts. Single-Class Resecuritization Trusts Fannie Mae single-class resecuritization trusts are created by depositing mortgage-backed securities (“MBS”) into a new securitization trust for the purpose of aggregating multiple mortgage-related securities into a single security. Single-class resecuritization securities pass through directly to the holders of the securities all of the cash flows of the underlying mortgage-backed securities held in the resecuritization trust. As a result of the Single Security Initiative, these securities can now be collateralized directly or indirectly by cash flows from underlying securities issued by Fannie Mae, Freddie Mac, or a combination of both. Resecuritization trusts backed directly or indirectly only by Fannie Mae MBS are non-commingled resecuritization trusts. Resecuritization trusts collateralized directly or indirectly by cash flows either in part or in whole from Freddie Mac securities are commingled resecuritization trusts. Securities issued by our non-commingled single-class resecuritization trusts are backed solely by Fannie Mae MBS and the guarantee we provide on the trust does not subject us to additional credit risk because we have already provided a guarantee on the underlying securities. Further, the securities issued by our non-commingled single-class resecuritization trusts pass through all of the cash flows of the underlying Fannie Mae MBS directly to the holders of the securities. Accordingly, these securities are deemed to be substantially the same as the underlying Fannie Mae MBS collateral. Additionally, our involvement with these trusts does not provide us with any incremental rights or powers that would enable us to direct any activities of the trusts. As a result, we have concluded that we are not the primary beneficiaries of, and as a result, we do not consolidate, our non-commingled single-class resecuritization trusts. Therefore, we account for purchases and sales of securities issued by non-commingled single-class resecuritization trusts as extinguishments and issuances of the underlying MBS debt, respectively. Securities issued by our commingled single-class resecuritization trusts are backed in whole or in part by Freddie Mac securities. The guaranty we provide to the commingled single-class resecuritization trust subjects us to additional credit risk because we are providing a guaranty for the timely payment of principal and interest on the underlying Freddie Mac securities that we have not previously guaranteed. Accordingly, securities issued by our commingled resecuritization trusts are not deemed to be substantially the same as the underlying collateral. We do not have any incremental rights or powers related to commingled single-class resecuritization trusts that would enable us to direct any activities of the underlying trusts. As a result, we have concluded that we are not the primary beneficiary of, and therefore do not consolidate, our commingled single-class resecuritization trusts unless we have the unilateral right to dissolve the trust. We have this right when we hold 100% of the beneficial interests issued by the resecuritization trust. Therefore, we account for purchases and sales of these securities as purchases and sales of investment securities. Multi-Class Resecuritization Trusts Multi-class resecuritization trusts are trusts we create to issue multi-class Fannie Mae structured securities, including REMICs and SMBS, in which the cash flows of the underlying mortgage assets are divided, creating several classes of securities, each of which represents a beneficial ownership interest in a separate portion of cash flows. We guarantee to each multi-class resecuritization trust that we will supplement amounts received by the trusts as required to permit timely payments of principal and interest, as applicable, on the related Fannie Mae structured securities. As a result of the Single Security Initiative, these multi-class structured securities can now be collateralized, directly or indirectly, by securities issued by Fannie Mae, Freddie Mac, or a combination of both. The guaranty we provide to our non-commingled multi-class resecuritization trusts does not subject us to additional credit risk, because the underlying assets are Fannie Mae-issued securities for which we have already provided a guaranty. However, for commingled multi-class structured securities, we are subject to additional credit risk because we are providing a guaranty for the timely payment of principal and interest on the underlying Freddie Mac securities that we have not previously guaranteed. For both commingled and non-commingled multi-class resecuritization trusts, we may also be exposed to prepayment risk via our ownership of securities issued by these trusts. We do not have the ability via our involvement with a multi-class resecuritization trust to impact either the credit risk or prepayment risk to which we are exposed. Therefore, we have concluded that we do not have the characteristics of a controlling financial interest and do not consolidate multi-class resecuritization trusts unless we have the unilateral right to dissolve the trust as noted below. Securities issued by multi-class resecuritization trusts do not directly pass through all of the cash flows of the underlying securities and therefore the issued and underlying securities are not considered substantially the same. Accordingly, if a multi-class resecuritization trust is not consolidated, we account for purchases and sales of securities issued by the trust as purchases and sales of investment securities. Beginning June 2019, in connection with the Single Security Initiative, we may now include UMBS, Supers and other structured securities backed by securities issued by Freddie Mac in our resecuritization trusts. As a result, we adopted a consolidation threshold for multi-class resecuritization trusts that is based on our ability to unilaterally dissolve the resecuritization trust. This ability exists only when we hold 100% of the outstanding beneficial interests issued by the resecuritization trust. This new consolidation threshold was applied prospectively upon implementation of the Single Security Initiative in the second quarter of 2019 and prior period amounts were not recast. Prior to the implementation of the Single Security Initiative, we consolidated multi-class resecuritization trusts when we held a substantial portion of the outstanding beneficial interests issued by the trust. Our adoption of the new consolidation threshold did not have a material impact on our condensed consolidated financial statements for the second quarter or first half of 2019. Regulatory Capital We submit capital reports to FHFA, which monitors our capital levels. The deficit of core capital over statutory minimum capital was $137.0 billion as of June 30, 2019 and $137.1 billion as of December 31, 2018. Due to the terms of our senior preferred stock, we do not expect to eliminate our deficit of core capital over statutory minimum capital. Related Parties Because Treasury holds a warrant to purchase shares of Fannie Mae common stock equal to 79.9% of the total number of shares of Fannie Mae common stock, we and Treasury are deemed related parties. As of June 30, 2019, Treasury held an investment in our senior preferred stock with an aggregate liquidation preference of $123.8 billion. See “Senior Preferred Stock Purchase Agreement and Senior Preferred Stock” above for additional information on transactions under this agreement. FHFA’s control of both Fannie Mae and Freddie Mac has caused Fannie Mae, FHFA and Freddie Mac to be deemed related parties. Additionally, Fannie Mae and Freddie Mac jointly own CSS, a limited liability company created to operate a common securitization platform; as such, CSS is deemed a related party. In the ordinary course of business, Fannie Mae may purchase and sell securities issued by Treasury and Freddie Mac. These transactions occur on the same terms as those prevailing at the time for comparable transactions with unrelated parties. With our implementation of the Single Security Initiative in June 2019, some of the structured securities we issue are backed in whole or in part by Freddie Mac securities. Additionally, we make regular income tax payments to and receive tax refunds from the Internal Revenue Service (“IRS”), a bureau of Treasury. Transactions with Treasury Our administrative expenses were reduced by $5 million and $6 million for the three months ended June 30, 2019 and 2018, respectively, and $10 million and $13 million for the six months ended June 30, 2019 and 2018, respectively, due to reimbursements from Treasury and Freddie Mac for expenses incurred as program administrator for Treasury’s Home Affordable Modification Program and other initiatives under Treasury’s Making Home Affordable Program. In December 2011, Congress enacted the Temporary Payroll Cut Continuation Act of 2011 (“TCCA”) which, among other provisions, required that we increase our single-family guaranty fees by at least 10 basis points and remit this increase to Treasury. Effective April 1, 2012, we increased the guaranty fee on all single-family residential mortgages delivered to us by 10 basis points. FHFA and Treasury advised us to remit this fee increase to Treasury with respect to all loans acquired by us on or after April 1, 2012 and before January 1, 2022, and to continue to remit these amounts to Treasury on and after January 1, 2022 with respect to loans we acquired before this date until those loans are paid off or otherwise liquidated. The resulting fee revenue and expense are recorded in “Mortgage loans interest income” and “TCCA fees,” respectively, in our condensed consolidated statements of operations and comprehensive income. We recognized $600 million and $565 million in TCCA fees during the three months ended June 30, 2019 and 2018, respectively, and $1.2 billion and $1.1 billion for the six months ended June 30, 2019 and 2018, respectively, of which $600 million had not been remitted to Treasury as of June 30, 2019. Under the Federal Housing Enterprises Financial Safety and Soundness Act of 1992, as amended, including by the Federal Housing Finance Regulatory Reform Act of 2008 (together, the “GSE Act”), we are required to set aside certain funding obligations, a portion of which is attributable to Treasury’s Capital Magnet Fund. These funding obligations, recognized in “Other expenses, net” in our condensed consolidated statements of operations and comprehensive income, are measured as the product of 4.2 basis points and the unpaid principal balance of our total new business purchases for the respective period, and 35% of this amount is payable to Treasury’s Capital Magnet Fund. We recognized a total of $21 million and $19 million in “Other expenses, net” for the three months ended June 30, 2019 and 2018, respectively, and $36 million and $37 million for the six months ended June 30, 2019 and 2018, respectively, relating to amounts payable to Treasury’s Capital Magnet Fund. In 2020, we expect to pay the $36 million recognized for the six months ended June 30, 2019 to Treasury’s Capital Magnet Fund, along with additional amounts based on our new business purchases in the second half of 2019. In April 2019, we paid $75 million to Treasury’s Capital Magnet Fund based on our new business purchases in 2018. Transactions with FHFA The GSE Act authorizes FHFA to establish an annual assessment for regulated entities, including Fannie Mae, which is payable on a semi-annual basis (April and October), for FHFA’s costs and expenses, as well as to maintain FHFA’s working capital. We recognized FHFA assessment fees, which are recorded in “Administrative expenses” in our condensed consolidated statements of operations and comprehensive income, of $29 million and $26 million for the three months ended June 30, 2019 and 2018, respectively, and $59 million and $55 million for the six months ended June 30, 2019 and 2018, respectively. Transactions with CSS and Freddie Mac We contributed capital to CSS, the company we jointly own with Freddie Mac, of $26 million and $35 million for the three months ended June 30, 2019 and 2018, respectively, and $62 million and $76 million for the six months ended June 30, 2019 and 2018, respectively. In the second quarter of 2019, Fannie Mae, Freddie Mac and CSS entered into an amendment to the customer services agreement that sets forth the terms under which CSS provides mortgage securitization services to us and Freddie Mac. In June 2019, we entered into an indemnification agreement with Freddie Mac relating to the commingled structured securities that we and Freddie Mac issue. Under the indemnification agreement, Fannie Mae and Freddie Mac each have agreed to indemnify the other party for losses caused by: its failure to meet its payment or other specified obligations under the trust agreements pursuant to which the underlying resecuritized securities were issued; its failure to meet its obligations under the customer services agreement; its violations of laws; or with respect to material misstatements or omissions in offering documents, ongoing disclosures and related materials relating to the underlying resecuritized securities. Earnings per Share Earnings per share (“EPS”) is presented for basic and diluted EPS. We compute basic EPS by dividing net income attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. However, as a result of our conservatorship status and the terms of the senior preferred stock, no amounts would be available to distribute as dividends to common or preferred stockholders (other than to Treasury as the holder of the senior preferred stock). Weighted average common shares includes 4.6 billion shares for the periods ended June 30, 2019 and 2018 that would be issued upon the full exercise of the warrant issued to Treasury from the date the warrant was issued through June 30, 2019 and 2018. The calculation of diluted EPS includes all the components of basic earnings per share, plus the dilutive effect of common stock equivalents such as convertible securities and stock options. Weighted average shares outstanding is increased to include the number of additional common shares that would have been outstanding if the dilutive potential common shares had been issued. For the three months ended June 30, 2019 and six months ended June 30, 2019 and 2018, our diluted EPS weighted average shares outstanding includes shares of common stock that would be issuable upon the conversion of 131 million shares of convertible preferred stock. For the three months ended June 30, 2018, convertible preferred stock is not included in the calculation because a net loss attributable to common shareholders was incurred and it would have an anti-dilutive effect. New Accounting Guidance The following updates information about our significant accounting policies that have recently been adopted or yet to be adopted from the information included in “Note 1, Summary of Significant Accounting Policies” in our 2018 Form 10-K. The Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments—Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments (“CECL”) in June 2016. It was amended by ASU 2019-04, Codification Improvements (to Topic 326), Financial Instruments—Credit Losses in April 2019. The standard replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects lifetime expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The amendments in this standard also require credit losses related to available-for-sale debt securities to be recorded through an allowance for credit losses. We do not expect a material impact for establishing an allowance for credit losses related to our available-for-sale debt securities. CECL will become effective for our fiscal year beginning January 1, 2020. We are continuing to update the allowance models and accounting systems that will be used to estimate credit losses and record accounting impacts under CECL, and we are in the process of validating their results. All updates to our allowance models are subject to our model oversight and review governance process. We expect model and system testing to continue in 2019, followed by full integrated testing across all affected systems and processes. We are managing the implementation of this guidance in accordance with our change management governance standards, which are designed to ensure compliance with GAAP as well as operational readiness at adoption. Senior management and the Audit Committee receive regular updates regarding the status of our implementation plan, results of modeled impacts and any identified key risks. We will use a discounted cash flow method to measure credit impairment on our single-family mortgage loans and an undiscounted loss method to measure credit impairment on our multifamily mortgage loans. The models we will use to estimate credit losses will incorporate our historical credit loss experience, adjusted for current economic forecasts and the current credit profile of our loan book of business. The models will use reasonable and supportable forecasts for key economic drivers, such as home prices (Single-Family), rental income (Multifamily) and capitalization rates (Multifamily). Based on the composition of the loans in our book of business as of June 30, 2019 and our current expectations of future economic conditions, we estimate that our adoption of CECL will result in a reduction in our retained earnings of up to $4 billion on an after-tax basis in the first quarter of 2020. We are still assessing the impact of various implementation issues as well as the FASB’s recently proposed guidance relating to the standard. The resolution of these items may reduce CECL’s impact on our retained earnings upon adoption. In addition, we continue to evaluate the results of our modeled loss estimates and may make refinements to our approach and assumptions. The impact of our adoption of CECL on our retained earnings will be further influenced by the credit risk profile of the loans in our book of business as of the January 1, 2020 adoption date, as well as economic conditions and forecasts of future economic conditions at that time.

We are a stockholder-owned corporation organized and existing under the Federal National Mortgage Association Charter Act (the “Charter Act” or our “charter”). We are a government-sponsored enterprise (“GSE”), and we are subject to government oversight and regulation. Our regulators include the Federal Housing Finance Agency (“FHFA”), the U.S. Department of Housing and Urban Development (“HUD”), the U.S. Securities and Exchange Commission (“SEC”), and the U.S. Department of the Treasury (“Treasury”). The U.S. government does not guarantee our securities or other obligations.

We have been under conservatorship, with FHFA acting as conservator, since September 6, 2008. See below and “Note 1, Summary of Significant Accounting Policies” in our annual report on Form 10-K for the year ended December 31, 2018 (“2018 Form 10-K”) for additional information on our conservatorship and the impact of U.S. government support of our business.

The unaudited interim condensed consolidated financial statements as of and for the three and six months ended June 30, 2019 and related notes, should be read in conjunction with our audited consolidated financial statements and related notes included in our 2018 Form 10-K.

The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial information and with the SEC’s instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and note disclosures required by GAAP for complete consolidated financial statements. In the opinion of management, all adjustments of a normal recurring nature considered necessary for a fair presentation have been included. The accompanying condensed consolidated financial statements include our accounts as well as the accounts of other entities in which we have a controlling financial interest. All intercompany accounts and transactions have been eliminated. To conform to our current period presentation, we have reclassified certain amounts reported in our prior period condensed consolidated financial statements. Results for the three and six months ended June 30, 2019 may not necessarily be indicative of the results for the year ending December 31, 2019.

Preparing condensed consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect our reported amounts of assets and liabilities, disclosure of contingent assets and liabilities as of the dates of our condensed consolidated financial statements, as well as our reported amounts of revenues and expenses during the reporting periods. Management has made significant estimates in a variety of areas including, but not limited to, the allowance for loan losses. Actual results could be different from these estimates.

On September 7, 2008, the Secretary of the Treasury and the Director of FHFA announced several actions taken by Treasury and FHFA regarding Fannie Mae, which included: (1) placing us in conservatorship and (2) the execution of a senior preferred stock purchase agreement by our conservator, on our behalf, and Treasury, pursuant to which we issued to Treasury both senior preferred stock and a warrant to purchase common stock.

There continues to be significant uncertainty regarding our future, including how long we will continue to exist in our current form, the extent of our role in the market, how long we will be in conservatorship, what form we will have and what ownership interest, if any, our current common and preferred stockholders will hold in us after the conservatorship is terminated and whether we will continue to exist following conservatorship. Treasury has made a commitment under the senior preferred stock purchase agreement to provide funding to us under certain circumstances if we have a net worth deficit. We are not aware of any plans of FHFA to fundamentally change our business model or reduce the aggregate amount available to or held by the company under our capital structure, which includes the senior preferred stock purchase agreement, in the near term.

Pursuant to the senior preferred stock purchase agreement, we issued shares of senior preferred stock to Treasury in 2008. Acting as successor to the rights, titles, powers and privileges of the Board, our conservator has declared and directed us to pay dividends to Treasury on the senior preferred stock on a quarterly basis for every dividend period for which dividends were payable since we entered conservatorship in 2008. The current dividend provisions of the senior preferred stock provide for quarterly dividends consisting of the amount, if any, by which our net worth as of the end of the immediately preceding fiscal quarter exceeds a $3.0 billion capital reserve amount. We refer to this as a “net worth sweep” dividend. On June 28, 2019, we paid Treasury a dividend of $2.4 billion based on our net worth of $5.4 billion as of March 31, 2019, less the applicable capital reserve amount of $3.0 billion. Because we had a net worth of $6.4 billion as of June 30, 2019, we expect to pay Treasury a dividend of $3.4 billion for the third quarter of 2019 by September 30, 2019.

Our condensed consolidated financial statements include our accounts as well as the accounts of the other entities in which we have a controlling financial interest. All intercompany balances and transactions have been eliminated. The typical condition for a controlling financial interest is ownership of a majority of the voting interests of an entity. A controlling financial interest may also exist in entities through arrangements that do not involve voting interests, such as a variable interest entity (“VIE”).

The Single Security Initiative is a joint initiative among Fannie Mae, Freddie Mac, and our jointly owned limited liability company, Common Securitization Solutions, LLC (“CSS”), under the direction of FHFA, to develop a single common mortgage-backed security issued by both Fannie Mae and Freddie Mac to finance fixed-rate mortgage loans backed by one- to four-unit single-family properties. The objective of the Single Security Initiative is to enhance the overall liquidity of Fannie Mae and Freddie Mac mortgage-backed securities eligible for trading in the to-be-announced (“TBA”) market by supporting their fungibility without regard to which company is the issuer. We and Freddie Mac began issuing uniform mortgage-backed securities (“UMBS”) pursuant to the Single Security Initiative in June 2019. We and Freddie Mac also began resecuritizing UMBS certificates into structured securities in June 2019. The structured securities backed by UMBS that we may issue include Supers, which are single-class resecuritization transactions, and Real Estate Mortgage Investment Conduit securities (“REMICs”) and interest-only and principal-only strip securities (“SMBS”), which are multi-class resecuritization transactions.

Beginning in June 2019 and going forward, we may include UMBS, Supers and other structured securities issued by Freddie Mac in our resecuritization trusts. The mortgage loans that serve as collateral for Freddie Mac-issued UMBS are not held in trusts that are consolidated by Fannie Mae. When we include Freddie Mac securities in our structured securities we are subject to additional credit risk because we guarantee securities that were not previously guaranteed by Fannie Mae. However, Freddie Mac continues to guarantee the payment of principal and interest on the underlying Freddie Mac securities that we have resecuritized. As such, we have concluded that this additional credit risk is negligible because of the funding commitment available to Freddie Mac through its senior preferred stock purchase agreement with Treasury. Prior to the implementation of the Single Security Initiative, the vast majority of underlying assets of our resecuritization trusts were limited to Fannie Mae securities that were collateralized by mortgage loans held in consolidated trusts.

Fannie Mae single-class resecuritization trusts are created by depositing mortgage-backed securities (“MBS”) into a new securitization trust for the purpose of aggregating multiple mortgage-related securities into a single security. Single-class resecuritization securities pass through directly to the holders of the securities all of the cash flows of the underlying mortgage-backed securities held in the resecuritization trust. As a result of the Single Security Initiative, these securities can now be collateralized directly or indirectly by cash flows from underlying securities issued by Fannie Mae, Freddie Mac, or a combination of both. Resecuritization trusts backed directly or indirectly only by Fannie Mae MBS are non-commingled resecuritization trusts. Resecuritization trusts collateralized directly or indirectly by cash flows either in part or in whole from Freddie Mac securities are commingled resecuritization trusts.

Securities issued by our non-commingled single-class resecuritization trusts are backed solely by Fannie Mae MBS and the guarantee we provide on the trust does not subject us to additional credit risk because we have already provided a guarantee on the underlying securities. Further, the securities issued by our non-commingled single-class resecuritization trusts pass through all of the cash flows of the underlying Fannie Mae MBS directly to the holders of the securities. Accordingly, these securities are deemed to be substantially the same as the underlying Fannie Mae MBS collateral. Additionally, our involvement

with these trusts does not provide us with any incremental rights or powers that would enable us to direct any activities of the trusts. As a result, we have concluded that we are not the primary beneficiaries of, and as a result, we do not consolidate, our non-commingled single-class resecuritization trusts. Therefore, we account for purchases and sales of securities issued by non-commingled single-class resecuritization trusts as extinguishments and issuances of the underlying MBS debt, respectively.

Securities issued by our commingled single-class resecuritization trusts are backed in whole or in part by Freddie Mac securities. The guaranty we provide to the commingled single-class resecuritization trust subjects us to additional credit risk because we are providing a guaranty for the timely payment of principal and interest on the underlying Freddie Mac securities that we have not previously guaranteed. Accordingly, securities issued by our commingled resecuritization trusts are not deemed to be substantially the same as the underlying collateral. We do not have any incremental rights or powers related to commingled single-class resecuritization trusts that would enable us to direct any activities of the underlying trusts. As a result, we have concluded that we are not the primary beneficiary of, and therefore do not consolidate, our commingled single-class resecuritization trusts unless we have the unilateral right to dissolve the trust. We have this right when we hold 100% of the beneficial interests issued by the resecuritization trust. Therefore, we account for purchases and sales of these securities as purchases and sales of investment securities.

Multi-class resecuritization trusts are trusts we create to issue multi-class Fannie Mae structured securities, including REMICs and SMBS, in which the cash flows of the underlying mortgage assets are divided, creating several classes of securities, each of which represents a beneficial ownership interest in a separate portion of cash flows. We guarantee to each multi-class resecuritization trust that we will supplement amounts received by the trusts as required to permit timely payments of principal and interest, as applicable, on the related Fannie Mae structured securities. As a result of the Single Security Initiative, these multi-class structured securities can now be collateralized, directly or indirectly, by securities issued by Fannie Mae, Freddie Mac, or a combination of both.

The guaranty we provide to our non-commingled multi-class resecuritization trusts does not subject us to additional credit risk, because the underlying assets are Fannie Mae-issued securities for which we have already provided a guaranty. However, for commingled multi-class structured securities, we are subject to additional credit risk because we are providing a guaranty for the timely payment of principal and interest on the underlying Freddie Mac securities that we have not previously guaranteed. For both commingled and non-commingled multi-class resecuritization trusts, we may also be exposed to prepayment risk via our ownership of securities issued by these trusts. We do not have the ability via our involvement with a multi-class resecuritization trust to impact either the credit risk or prepayment risk to which we are exposed. Therefore, we have concluded that we do not have the characteristics of a controlling financial interest and do not consolidate multi-class resecuritization trusts unless we have the unilateral right to dissolve the trust as noted below.

Securities issued by multi-class resecuritization trusts do not directly pass through all of the cash flows of the underlying securities and therefore the issued and underlying securities are not considered substantially the same. Accordingly, if a multi-class resecuritization trust is not consolidated, we account for purchases and sales of securities issued by the trust as purchases and sales of investment securities.

Beginning June 2019, in connection with the Single Security Initiative, we may now include UMBS, Supers and other structured securities backed by securities issued by Freddie Mac in our resecuritization trusts. As a result, we adopted a consolidation threshold for multi-class resecuritization trusts that is based on our ability to unilaterally dissolve the resecuritization trust. This ability exists only when we hold 100% of the outstanding beneficial interests issued by the resecuritization trust. This new consolidation threshold was applied prospectively upon implementation of the Single Security Initiative in the second quarter of 2019 and prior period amounts were not recast. Prior to the implementation of the Single Security Initiative, we consolidated multi-class resecuritization trusts when we held a substantial portion of the outstanding beneficial interests issued by the trust. Our adoption of the new consolidation threshold did not have a material impact on our condensed consolidated financial statements for the second quarter or first half of 2019.

We submit capital reports to FHFA, which monitors our capital levels. The deficit of core capital over statutory minimum capital was $137.0 billion as of June 30, 2019 and $137.1 billion as of December 31, 2018. Due to the terms of our senior preferred stock, we do not expect to eliminate our deficit of core capital over statutory minimum capital.

Because Treasury holds a warrant to purchase shares of Fannie Mae common stock equal to 79.9% of the total number of shares of Fannie Mae common stock, we and Treasury are deemed related parties. As of June 30, 2019, Treasury held an investment in our senior preferred stock with an aggregate liquidation preference of $123.8 billion. See “Senior Preferred Stock Purchase Agreement and Senior Preferred Stock” above for additional information on transactions under this agreement.

FHFA’s control of both Fannie Mae and Freddie Mac has caused Fannie Mae, FHFA and Freddie Mac to be deemed related parties. Additionally, Fannie Mae and Freddie Mac jointly own CSS, a limited liability company created to operate a common securitization platform; as such, CSS is deemed a related party.

In the ordinary course of business, Fannie Mae may purchase and sell securities issued by Treasury and Freddie Mac. These transactions occur on the same terms as those prevailing at the time for comparable transactions with unrelated parties. With our implementation of the Single Security Initiative in June 2019, some of the structured securities we issue are backed in whole or in part by Freddie Mac securities. Additionally, we make regular income tax payments to and receive tax refunds from the Internal Revenue Service (“IRS”), a bureau of Treasury.

Our administrative expenses were reduced by $5 million and $6 million for the three months ended June 30, 2019 and 2018, respectively, and $10 million and $13 million for the six months ended June 30, 2019 and 2018, respectively, due to reimbursements from Treasury and Freddie Mac for expenses incurred as program administrator for Treasury’s Home Affordable Modification Program and other initiatives under Treasury’s Making Home Affordable Program.

In December 2011, Congress enacted the Temporary Payroll Cut Continuation Act of 2011 (“TCCA”) which, among other provisions, required that we increase our single-family guaranty fees by at least 10 basis points and remit this increase to Treasury. Effective April 1, 2012, we increased the guaranty fee on all single-family residential mortgages delivered to us by 10 basis points. FHFA and Treasury advised us to remit this fee increase to Treasury with respect to all loans acquired by us on or after April 1, 2012 and before January 1, 2022, and to continue to remit these amounts to Treasury on and after January 1, 2022 with respect to loans we acquired before this date until those loans are paid off or otherwise liquidated. The resulting fee revenue and expense are recorded in “Mortgage loans interest income” and “TCCA fees,” respectively, in our condensed consolidated statements of operations and comprehensive income. We recognized $600 million and $565 million in TCCA fees during the three months ended June 30, 2019 and 2018, respectively, and $1.2 billion and $1.1 billion for the six months ended June 30, 2019 and 2018, respectively, of which $600 million had not been remitted to Treasury as of June 30, 2019.

Under the Federal Housing Enterprises Financial Safety and Soundness Act of 1992, as amended, including by the Federal Housing Finance Regulatory Reform Act of 2008 (together, the “GSE Act”), we are required to set aside certain funding obligations, a portion of which is attributable to Treasury’s Capital Magnet Fund. These funding obligations, recognized in “Other expenses, net” in our condensed consolidated statements of operations and comprehensive income, are measured as the product of 4.2 basis points and the unpaid principal balance of our total new business purchases for the respective period, and 35% of this amount is payable to Treasury’s Capital Magnet Fund. We recognized a total of $21 million and $19 million in “Other expenses, net” for the three months ended June 30, 2019 and 2018, respectively, and $36 million and $37 million for the six months ended June 30, 2019 and 2018, respectively, relating to amounts payable to Treasury’s Capital Magnet Fund. In 2020, we expect to pay the $36 million recognized for the six months ended June 30, 2019 to Treasury’s Capital Magnet Fund, along with additional amounts based on our new business purchases in the second half of 2019. In April 2019, we paid $75 million to Treasury’s Capital Magnet Fund based on our new business purchases in 2018.

The GSE Act authorizes FHFA to establish an annual assessment for regulated entities, including Fannie Mae, which is payable on a semi-annual basis (April and October), for FHFA’s costs and expenses, as well as to maintain FHFA’s working capital. We recognized FHFA assessment fees, which are recorded in “Administrative expenses” in our condensed consolidated statements of operations and comprehensive income, of $29 million and $26 million for the three months ended June 30, 2019 and 2018, respectively, and $59 million and $55 million for the six months ended June 30, 2019 and 2018, respectively.

We contributed capital to CSS, the company we jointly own with Freddie Mac, of $26 million and $35 million for the three months ended June 30, 2019 and 2018, respectively, and $62 million and $76 million for the six months ended June 30, 2019 and 2018, respectively. In the second quarter of 2019, Fannie Mae, Freddie Mac and CSS entered into an amendment to the customer services agreement that sets forth the terms under which CSS provides mortgage securitization services to us and Freddie Mac. In June 2019, we entered into an indemnification agreement with Freddie Mac relating to the commingled structured securities that we and Freddie Mac issue. Under the indemnification agreement, Fannie Mae and Freddie Mac each have agreed to indemnify the other party for losses caused by: its failure to meet its payment or other specified obligations under the trust agreements pursuant to which the underlying resecuritized securities were issued; its failure to meet its obligations under the customer services agreement; its violations of laws; or with respect to material misstatements or omissions in offering documents, ongoing disclosures and related materials relating to the underlying resecuritized securities.

Earnings per share (“EPS”) is presented for basic and diluted EPS. We compute basic EPS by dividing net income attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period. However, as a result of our conservatorship status and the terms of the senior preferred stock, no amounts would be available to distribute as dividends to common or preferred stockholders (other than to Treasury as the holder of the senior preferred stock). Weighted average common shares includes 4.6 billion shares for the periods ended June 30, 2019 and 2018 that would be issued upon the full exercise of the warrant issued to Treasury from the date the warrant was issued through June 30, 2019 and 2018.

The calculation of diluted EPS includes all the components of basic earnings per share, plus the dilutive effect of common stock equivalents such as convertible securities and stock options. Weighted average shares outstanding is increased to include the number of additional common shares that would have been outstanding if the dilutive potential common shares had been issued. For the three months ended June 30, 2019 and six months ended June 30, 2019 and 2018, our diluted EPS weighted average shares outstanding includes shares of common stock that would be issuable upon the conversion of 131 million shares of convertible preferred stock. For the three months ended June 30, 2018, convertible preferred stock is not included in the calculation because a net loss attributable to common shareholders was incurred and it would have an anti-dilutive effect.

The Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments—Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments (“CECL”) in June 2016. It was amended by ASU 2019-04, Codification Improvements (to Topic 326), Financial Instruments—Credit Losses in April 2019. The standard replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects lifetime expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The amendments in this standard also require credit losses related to available-for-sale debt securities to be recorded through an allowance for credit losses. We do not expect a material impact for establishing an allowance for credit losses related to our available-for-sale debt securities.

CECL will become effective for our fiscal year beginning January 1, 2020. We are continuing to update the allowance models and accounting systems that will be used to estimate credit losses and record accounting impacts under CECL, and we are in the process of validating their results. All updates to our allowance models are subject to our model oversight and review governance process. We expect model and system testing to continue in 2019, followed by full integrated testing across all affected systems and processes. We are managing the implementation of this guidance in accordance with our change management governance standards, which are designed to ensure compliance with GAAP as well as operational readiness at adoption. Senior management and the Audit Committee receive regular updates regarding the status of our implementation plan, results of modeled impacts and any identified key risks.

We will use a discounted cash flow method to measure credit impairment on our single-family mortgage loans and an undiscounted loss method to measure credit impairment on our multifamily mortgage loans. The models we will use to estimate credit losses will incorporate our historical credit loss experience, adjusted for current economic forecasts and the current credit profile of our loan book of business. The models will use reasonable and supportable forecasts for key economic drivers, such as home prices (Single-Family), rental income (Multifamily) and capitalization rates (Multifamily).

Based on the composition of the loans in our book of business as of June 30, 2019 and our current expectations of future economic conditions, we estimate that our adoption of CECL will result in a reduction in our retained earnings of up to $4 billion on an after-tax basis in the first quarter of 2020. We are still assessing the impact of various implementation issues as well as the FASB’s recently proposed guidance relating to the standard. The resolution of these items may reduce CECL’s impact on our retained earnings upon adoption. In addition, we continue to evaluate the results of our modeled loss estimates and may make refinements to our approach and assumptions. The impact of our adoption of CECL on our retained earnings will be further influenced by the credit risk profile of the loans in our book of business as of the January 1, 2020 adoption date, as well as economic conditions and forecasts of future economic conditions at that time.