Fair Values of Financial Instruments. | Note 18. Fair Values of Financial Instruments. Estimated Fair Values — Summary Tables — The carrying values, estimated fair values and the levels within the fair value hierarchy were as follows (in thousands): September 30, 2018 Estimated Fair Value Financial Instruments Carrying Value Total Level 1 Level 2 Level 3 (a) Netting Assets Cash and due from banks $ $ $ $ — $ — $ — Securities purchased under agreements to resell — — — Federal funds sold — — — Trading securities — — Equity Investments — — — Available-for-sale securities — — Held-to-maturity securities — — Advances — — — Mortgage loans held-for-portfolio, net — — — Accrued interest receivable — — — Derivative assets — — ) Other financial assets — — — Liabilities Deposits — — — Consolidated obligations Bonds — — — Discount notes — — — Mandatorily redeemable capital stock — — — Accrued interest payable — — — Derivative liabilities — — ) Other financial liabilities — — — December 31, 2017 Estimated Fair Value Financial Instruments Carrying Value Total Level 1 Level 2 Level 3 (a) Netting Assets Cash and due from banks $ $ $ $ — $ — $ — Securities purchased under agreements to resell — — — Federal funds sold — — — Trading securities — — Available-for-sale securities — — Held-to-maturity securities — — Advances — — — Mortgage loans held-for-portfolio, net — — Accrued interest receivable — — — Derivative assets — — ) Other financial assets — — — Liabilities Deposits — — — Consolidated obligations Bonds — — — Discount notes — — — Mandatorily redeemable capital stock — — — Accrued interest payable — — — Derivative liabilities — — ) Other financial liabilities — — — The fair value amounts recorded on the Statements of Condition or presented have been determined by the FHLBNY using available market information and our reasonable judgment of appropriate valuation methods. (a) Level 3 Instruments — The fair values of non-Agency private-label MBS and housing finance agency bonds were estimated by management based on pricing services. Valuations may have required pricing services to use significant inputs that were subjective because of the current lack of significant market activity; the inputs may not be market based and observable. Fair Value Hierarchy The FHLBNY records trading securities, available-for-sale securities, derivative assets, derivative liabilities, and Consolidated obligations and advances elected under the FVO at fair values on a recurring basis. On a non-recurring basis, when held-to-maturity securities are determined to be OTTI, the securities are written down, they are recorded at their fair values, and when mortgage loans held-for-portfolio are written down or are foreclosed as Other real estate owned (“REO” or “OREO”), they are recorded at the fair values of the real estate collateral supporting the mortgage loans. The accounting standards under Fair Value Measurement defines fair value, establishes a consistent framework for measuring fair value and requires disclosures about fair value measurements. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Among other things, the standard requires the FHLBNY to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard specifies a hierarchy of inputs based on whether the inputs are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the FHLBNY’s market assumptions. These two types of inputs have created the following fair value hierarchy, and an entity must disclose the level within the fair value hierarchy in which the measurements are classified for all assets and liabilities measured on a recurring or non-recurring basis: · Level 1 Inputs — Quoted prices (unadjusted) for identical assets or liabilities in an active market that the reporting entity can access on the measurement date. · Level 2 Inputs — Inputs other than quoted prices within Level 1 that are observable inputs for the asset or liability, either directly or indirectly. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following: (1) quoted prices for similar assets or liabilities in active markets; (2) quoted prices for identical or similar assets or liabilities in markets that are not active; (3) inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates and yield curves that are observable at commonly quoted intervals, and volatilities). · Level 3 Inputs — Inputs that are unobservable and significant to the valuation of the asset or liability. The inputs are evaluated on an overall level for the fair value measurement to be determined. This overall level is an indication of market observability of the fair value measurement for the asset or liability. Changes in the observability of the valuation inputs may result in a reclassification of certain assets or liabilities. These reclassifications are reported as transfers in/out as of the beginning of the quarter in which the changes occur. There were no such transfers in any periods in this report. The availability of observable inputs can vary from product to product and is affected by a wide variety of factors including, for example, the characteristics peculiar to the transaction. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the FHLBNY in determining fair value is greatest for instruments categorized as Level 3. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes the level in the fair value hierarchy within which the fair value measurement falls is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Summary of Valuation Techniques and Primary Inputs The fair value of a financial instrument that is an asset is defined as the price the FHLBNY would receive to sell the asset in an orderly transaction with market participants. A financial liability’s fair value is defined as the amount that would be paid to transfer the liability to a new obligor, not the amount that would be paid to settle the liability with the creditor. Where available, fair values are based on observable market prices or parameters, or derived from such prices or parameters. Where observable prices are not available, valuation models and inputs are utilized. These valuation techniques involve some level of management estimation and judgment, the degree of which is dependent on the price transparency for the instruments or markets and the instruments’ complexity. Because an active secondary market does not exist for a portion of the FHLBNY’s financial instruments, in certain cases, fair values are not subject to precise quantification or verification and may change as economic and market factors and evaluation of those factors change. The fair values of financial assets and liabilities reported in the tables above are discussed below: Investment Debt Securities — The fair value of investment debt securities is estimated by the FHLBNY using pricing primarily from pricing services. The pricing vendors typically use market multiples derived from a set of comparables, including matrix pricing, and other techniques. Mortgage-backed securities — The FHLBNY’s valuation technique incorporates prices from up to three designated third-party pricing services at September 30, 2018 and December 31, 2017. The FHLBNY’s base investment pricing methodology establishes a median price for each security using a formula that is based on the number of prices received. If three prices are received, the middle price is used; if two prices are received, the average of the two prices is used; and if one price is received, it is used, typically subject to further validation. Vendor prices that are outside of a defined tolerance threshold of the median price are identified as outliers and subject to additional review, including, but not limited to, comparison to prices provided by an additional third-party valuation service, prices for similar securities, and/or non-binding dealer estimates, or use of internal model prices, which are deemed to be reflective of all relevant facts and circumstances that a market participant would consider. Such analysis is also applied in those limited instances where no third-party vendor price or only one third-party vendor price is available in order to arrive at an estimated fair value. In its analysis, the FHLBNY employs the concept of cluster pricing and cluster tolerances. Once the median prices are computed from the three pricing vendors, the second step is to determine which of the sourced prices fall within the required tolerance level interval to the median price, which forms the “cluster” of prices to be averaged. This average will determine a “default” price for the security. The cluster tolerance guidelines shall be reviewed annually and may be revised as necessary. To be included among the cluster, each price must fall within 7 points of the median price for residential PLMBS and within 3 points of the median price for GSE-issued MBS. The final step is to determine the final price of the security based on the cluster average and an evaluation of any outlier prices. If the analysis confirms that an outlier is not representative of fair value and that the average of the vendor prices within the tolerance threshold of the median price is the best estimate, then the average of the vendor prices within the tolerance threshold of the median price is used as the final price. If, on the other hand, an outlier (or some other price identified in the analysis) is determined to be a better estimate of fair value, then the outlier (or the other price as appropriate) is used as the final price. In all cases, the final price is used to determine the fair value of the security. The FHLBNY has also concluded that the pricing vendors use methods that generally employ, but are not limited to benchmark yields, recent trades, dealer estimates, valuation models, benchmarking of like securities, sector groupings, and/or matrix pricing. To validate vendor prices of PLMBS, the FHLBNY has also adopted a formal process to examine yields as an additional validation method. The FHLBNY calculates an implied yield for each of its PLMBS using estimated fair values derived from cash flows on a bond-by-bond basis. This yield is then compared to the implied yield for comparable securities according to price information from third-party MBS “market surveillance reports”. Significant variances or inconsistencies are evaluated in conjunction with all of the other available pricing information. The objective is to determine whether an adjustment to the fair value estimate is appropriate. Based on the FHLBNY’s review processes, management has concluded that inputs into the pricing models employed by pricing services for the FHLBNY’s investments in GSE securities are market based and observable and are considered to be within Level 2 of the fair value hierarchy. The valuation of the private-label securities, all designated as held-to-maturity, may require pricing services to use significant inputs that are subjective and are considered to be within Level 3 of the fair value hierarchy. This determination was made based on management’s view that the private-label instruments may not have an active market because of the specific vintage of the securities as well as inherent conditions surrounding the trading of private-label MBS, so that the inputs may not be market based and observable. At September 30, 2018, no held-to-maturity private-label MBS was deemed OTTI. An immaterial amount of OTTI was recorded in the 2018 second quarter. At December 31, 2017, no held-to-maturity private-label MBS was deemed OTTI that would have required the OTTI security to be written down to its fair value. Housing finance agency bonds — The fair value of housing finance agency bonds is estimated by management using information primarily from pricing services. Because of the current lack of significant market activity, their fair values were categorized within Level 3 of the fair value hierarchy as inputs into vendor pricing models may not be market based and observable. Trading Securities — The FHLBNY classifies trading securities as Level 1 of the fair value hierarchy when we use quoted market prices in active markets to determine the fair value of trading securities, such as U.S. government securities. We classify trading securities as Level 2 of the fair value hierarchy when we use quoted market prices in less active markets to determine the fair value of trading securities. Equity Investments — The FHLBNY has grantor trusts, which invest in money market, equity and fixed income and bond funds. Investments in the trusts were classified as AFS before January 1, 2018. Daily net asset values (“NAVs”) are readily available and investments are redeemable at short notice. NAVs are the fair values of the funds in the grantor trusts. Because of the highly liquid nature of the investments at their NAVs, they are categorized as Level 1 financial instruments under the valuation hierarchy. Advances — The FHLBNY has elected the FVO designation for certain advances and recorded their fair values in the Statements of Condition for such advances. The fair values are computed using standard option valuation models. The most significant inputs to the valuation model are (1) Consolidated obligation debt curve (“CO Curve”), published by the Office of Finance and available to the public, and (2) LIBOR swap curves and volatilities. Both these inputs are considered to be market based and observable as they can be directly corroborated by market participants. The CO Curve is the primary input, which is market based and observable. Inputs to apply spreads, which are FHLBNY specific, were not material. Fair values were classified within Level 2 of the valuation hierarchy. The FHLBNY determines the fair values of advances elected under the FVO by calculating the present value of expected future cash flows from the advances, a methodology also referred to as the Income approach under the Fair Value Measurement standards. The discount rates used in these calculations are equivalent to the replacement advance rates for advances with similar terms. In accordance with the Finance Agency’s “Advances” regulations, an advance with a maturity or repricing period greater than six months requires a prepayment fee sufficient to make a FHLBank financially indifferent to the borrower’s decision to prepay the advance. Therefore, the fair value of an advance does not assume prepayment risk. The inputs used to determine fair value of advances elected under the FVO are as follows: · CO Curve. The FHLBNY uses the CO Curve, which represents its cost of funds, as an input to estimate the fair value of advances, and to determine current advance rates. This input is considered market observable and therefore a Level 2 input. · Volatility assumption. To estimate the fair value of advances with optionality, the FHLBNY uses market-based expectations of future interest rate volatility implied from current market prices for similar options. This input is considered a Level 2 input as it is market based and market observable. · Spread adjustment. Adjustments represent the FHLBNY’s mark-up based on its pricing strategy. The input is considered as unobservable, and is classified as a Level 3 input. The spread adjustment is not a significant input to the overall fair value of an advance. The FHLBNY creates an internal curve, which is interpolated from its advance rates. Advance rates are calculated by applying a spread to an underlying “base curve” derived from the FHLBNY’s cost of funds, which is based on the CO Curve, inputs to which have been determined to be market observable and classified as Level 2. The spreads applied to the base advance pricing curve typically represent the FHLBNY’s mark-ups over the FHLBNY’s cost of funds, and are not market observable inputs, but are based on the FHLBNY’s advance pricing strategy. Such inputs have been classified as a Level 3 input, and were considered as not significant. To determine the appropriate classification of the overall measurement in the fair value hierarchy of an advance, an analysis of the inputs to the entire fair value measurement was performed at September 30, 2018 and December 31, 2017. If the unobservable spread to the FHLBNY’s cost of funds was not significant to the overall fair value, then the measurement was classified as Level 2. Conversely, if the unobservable spread was significant to the overall fair value, then the measurement would be classified as Level 3. The impact of the unobservable input was calculated as the difference in the value determined by discounting an advance’s cash flows using the FHLBNY’s advance curve and the value determined by discounting an advance’s cash flows using the FHLBNY’s cost of funds curve. Given the relatively small mark-ups over the FHLBNY’s cost of funds, the results of the FHLBNY’s quantitative analysis confirmed the FHLBNY’s expectations that the measurement of the FHLBNY’s advances was Level 2. The unobservable mark-up spreads were not significant to the overall fair value of the instrument. A quantitative threshold for the significance factor has been established at 10%, with additional qualitative factors to be considered if the ratio exceeded the threshold. Consolidated Obligations — The FHLBNY estimates the fair values of Consolidated obligations elected under the FVO based on the present values of expected future cash flows due on the debt obligations. Calculations are performed by using the FHLBNY’s industry standard option adjusted valuation models. Inputs are based on the cost of comparable term debt. The FHLBNY’s internal valuation models use standard valuation techniques and estimate fair values based on the following inputs: · CO Curve and LIBOR Swap Curve. The Office of Finance constructs an internal curve, referred to as the CO Curve, using the U.S. Treasury Curve as a base curve that is then adjusted by adding indicative spreads obtained from market observable sources. These market indications are generally derived from pricing indications from dealers, historical pricing relationships, recent GSE trades and secondary market activity. The FHLBNY considers the inputs as Level 2 inputs as they are market observable. · Volatility assumption. To estimate the fair values of Consolidated obligations with optionality, the FHLBNY uses market-based expectations of future interest rate volatility implied from current market prices for similar options. These inputs are also considered Level 2 as they are market based and observable. The CO Curve and volatility assumptions (for debt with call options) were primary inputs, which are market based and observable. Fair values were classified within Level 2 of the valuation hierarchy. Derivative Assets and Liabilities — The FHLBNY’s derivatives (cleared derivatives and bilaterally executed derivatives) are executed in the over-the-counter market and are valued using internal valuation techniques as no quoted market prices exist for such instruments. Discounted cash flow analysis is the primary methodology employed by the FHLBNY’s valuation models to measure the fair values of interest rate swaps. The valuation technique is considered as an “Income approach”. Interest rate caps and floors are valued under the “Market approach”. Interest rate swaps and interest rate caps and floors, collectively “derivatives”, were valued in industry-standard option adjusted valuation models, which generated fair values. The valuation models employed multiple market inputs including interest rates, prices and indices to create continuous yield or pricing curves and volatility factors. These multiple market inputs were corroborated by management to independent market data, and to relevant benchmark indices. In addition, derivative valuations were compared by management to counterparty valuations received as part of the collateral exchange process. These derivative positions were classified within Level 2 of the valuation hierarchy at September 30, 2018 and December 31, 2017. The FHLBNY’s valuation model utilizes a modified Black-Karasinski methodology. Significant market based and observable inputs into the valuation model include volatilities and interest rates. The Bank’s valuation model employs industry standard market-observable inputs (inputs that are actively quoted and can be validated to external sources). Inputs by class of derivative were as follows: Interest-rate related: · LIBOR Swap Curve. · Volatility assumption. Market-based expectations of future interest rate volatility implied from current market prices for similar options. · Prepayment assumption (if applicable). · Federal funds curve (OIS curve). Mortgage delivery commitments (considered a derivative): · TBA security prices are adjusted for differences in coupon, average loan rate and seasoning. OIS — The FHLBNY incorporates the overnight indexed swap (“OIS”) curves as fair value measurement inputs for the valuation of its derivatives, as the OIS curves reflect the interest rates paid on cash collateral provided against the fair value of these derivatives. The FHLBNY believes using relevant OIS curves as inputs to determine fair value measurements provides a more representative reflection of the fair values of these collateralized interest-rate related derivatives. The OIS curve (federal funds rate curve) is an input to the valuation model. The input for the federal funds curve is obtained from industry standard pricing vendors and the input is available and observable over its entire term structure. Management considers the federal funds curve to be a Level 2 input. The FHLBNY’s valuation model utilizes industry standard OIS methodology. The model generates forecasted cash flows using the OIS calibrated 3-month LIBOR curve. The model then discounts the cash flows by the OIS curve to generate fair values. Credit risk and credit valuation adjustments — The FHLBNY is subject to credit risk in derivatives transactions due to the potential non-performance of its derivatives counterparties or a DCO. To mitigate this risk, the FHLBNY has entered into master netting agreements and credit support agreements with its derivative counterparties for its bilaterally executed derivative contracts that provide for the delivery of collateral at specified levels at least weekly. The computed fair values of the derivatives took into consideration the effects of legally enforceable master netting agreements that allow the FHLBNY to settle positive and negative positions and offset cash collateral with the same counterparty on a net basis. For derivative transactions executed as a cleared derivative, the transactions are fully collateralized in cash and for the most part exchanged and settled daily with the DCO. The FHLBNY has also established the enforceability of offsetting rights incorporated in the agreements for the cleared derivative transactions. As a result of these practices and agreements and the FHLBNY’s assessment of any change in its own credit spread, the FHLBNY has concluded that the impact of the credit differential between the FHLBNY and its derivative counterparties and DCO was sufficiently mitigated to an immaterial level that no credit adjustments were deemed necessary to the recorded fair value of Derivative assets and Derivative liabilities in the Statements of Condition at September 30, 2018 and December 31, 2017. Fair Value Measurement The tables below present the fair value of those assets and liabilities that are recorded at fair value on a recurring or non-recurring basis at September 30, 2018 and December 31, 2017, by level within the fair value hierarchy. The FHLBNY also measures certain held-to-maturity securities at fair value on a non-recurring basis when a credit loss is recognized and the carrying value of the asset is adjusted to fair value. Certain mortgage loans that were partially charged-off were recorded at their collateral values on a non-recurring basis. Other real estate owned (“OREO”) is measured at fair value when the asset’s fair value less costs to sell is lower than its carrying amount. Items Measured at Fair Value on a Recurring Basis (in thousands): September 30, 2018 Total Level 1 Level 2 Level 3 Netting Assets Trading securities GSE securities $ $ — $ $ — $ — Corporate notes — — — U.S. Treasury securities — — — Equity Investments — — — Available-for-sale securities GSE/U.S. agency issued MBS — — — Derivative assets (a) Interest-rate derivatives — — ) Mortgage delivery commitments — — — Total recurring fair value measurement - assets $ $ $ $ — $ ) Liabilities Bonds (to the extent FVO is elected) (b) $ ) $ — $ ) $ — $ — Derivative liabilities (a) Interest-rate derivatives ) — ) — Mortgage delivery commitments ) — ) — — Total recurring fair value measurement - liabilities $ ) $ — $ ) $ — $ December 31, 2017 Total Level 1 Level 2 Level 3 Netting Assets Trading securities GSE securities $ $ — $ $ — $ — U.S. Treasury securities — — — Available-for-sale securities GSE/U.S. agency issued MBS — — — Equity and bond funds — — — Advances (to the extent FVO is elected) — — — Derivative assets (a) Interest-rate derivatives — — ) Mortgage delivery commitments — — — Total recurring fair value measurement - assets $ $ $ $ — $ ) Liabilities Consolidated obligations: Discount notes (to the extent FVO is elected) $ ) $ — $ ) $ — $ — Bonds (to the extent FVO is elected) (b) ) — ) — — Derivative liabilities (a) Interest-rate derivatives ) — ) — Mortgage delivery commitments ) — ) — — Total recurring fair value measurement - liabilities $ ) $ — $ ) $ — $ (a) Based on analysis of the nature of the risk, the presentation of derivatives as a single class is appropriate. (b) Based on analysis of the nature of risks of Consolidated obligation bonds measured at fair value, the FHLBNY has determined that presenting the bonds as a single class is appropriate. Items Measured at Fair Value on a Non-recurring Basis (in thousands): September 30, 2018 Fair Value Level 1 Level 2 Level 3 Mortgage loans held-for-portfolio $ $ — $ $ — Real estate owned — — Total non-recurring assets at fair value $ $ — $ $ December 31, 2017 Fair Value Level 1 Level 2 Level 3 Mortgage loans held-for-portfolio $ $ — $ $ — Real estate owned — — Total non-recurring assets at fair value $ $ — $ $ Fair Value Option Disclosures The fair value option (“FVO”) provides an irrevocable option to elect fair value as an alternative measurement for selected financial assets, financial liabilities, unrecognized firm commitments, and written loan commitments not previously carried at fair value. It requires entities to display the fair value of those assets and liabilities for which the entity has chosen to use fair value on the face of the Statements of Condition. Fair value is used for both the initial and subsequent measurement of the designated assets, liabilities and commitments, with the changes in fair value recognized in net income. Interest income and interest expense on advances and Consolidated obligations at fair value are recognized solely on the contractual amount of interest due or unpaid. Any transaction fees or costs are immediately recognized into non-interest income or non-interest expense. The FHLBNY has elected the FVO for certain advances and certain Consolidated obligations that either do not qualify for hedge accounting or may be at risk for not meeting hedge effectiveness requirements, primarily in an effort to mitigate the potential income statement volatility that can arise from economic hedging relationships in which the carrying value of the hedged item is not adjusted for changes in fair value. Advances have also been elected under the FVO when analysis indicated that changes in the fair values of the advance would be an offset to fair value volatility of debt elected under the FVO. The FVO election is made at inception of the contracts for advances and debt obligations. For instruments for which the fair value option has been elected, the related contractual interest income, contractual interest expense and the discount amortization on fair value option discount notes are recorded as part of net interest income in the Statements of Income. The remaining changes in fair value for instruments for which the fair value option has been elected are recorded as net gains (losses) on financial instruments held under fair value option in the Statements of Income. The change in fair value does not include changes in instrument-specific credit risk. The FHLBNY has determined that no adjustments to the fair values of its instruments recorded under the fair value option for instrument-specific credit risk were necessary at September 30, 2018 and December 31, 2017. Advances elected under the FVO were short-term in nature, with tenors that were generally less than 24 months. As with all advances, the loans were fully collateralized through their terms to maturity. Consolidated obligation bonds and discount notes elected under the FVO are high credit quality, highly-rated instruments, and changes in fair values were generally related to changes in interest rates and investor preference, including investor asset allocation strategies. The FHLBNY believes the credit-quality of Consolidated obligation debt has remained stable, and changes in fair value attributable to instrument-specific credit risk, if any, were not material given that the debt elected under the FVO had been issued within the past 24 months, and no adverse changes have been observed in their credit characteristics. The following tables summarize the activity related to financial instruments for which the FHLBNY elected the fair value option (in thousands): Three months ended September 30, 2018 2017 2018 2017 2018 2017 Advances Bonds Discount Notes Balance, beginning of the period $ $ $ ) $ ) $ — $ ) New transactions elected for fair value option — — ) — — ) Maturities and terminations ) ) — — Net gains (losses) on financial instruments held under fair value option ) ) ) — ) Change in accrued interest/unaccreted balance ) ) — Balance, end of the period $ — $ $ ) $ ) $ — $ ) Nine months ended September 30, 2018 2017 2018 2017 2018 2017 Advances Bonds Discount Notes Balance, beginning of the period $ $ $ ) $ ) $ ) $ ) New transactions elected for fair value option — ) — ) ) Maturities and terminations ) ) Net gains (losses) on financial instruments held under fair value option ) ) Change in accrued interest/unaccreted balance ) ) Balance, end of the period $ — $ $ ) $ ) $ — $ ) The following tables present the change in fair value included in the Statements of Income for financial instruments for which the fair value option has been elected (in thousands): Three months ended September 30, 2018 2017 Interest Net Gains Total Change in Fair Interest Income Net Gains Total Change in Fair Advances $ $ ) $ $ $ ) $ Nine months ended September 30, 2018 2017 Interest Net Gains Total Change in Fair Interest Income Net Gains Total Change in Fair Advances $ $ ) $ $ $ ) $ Three months ended September 30, 2018 2017 Interest Expense Net Gains Total Change in Fair Interest Expense Net Gains Total Change in Fair Consolidated obligation bonds $ ) $ $ $ ) $ ) $ ) Consolidated obligation discount notes — — — ) ) ) $ ) $ $ $ ) $ ) $ ) Nine months ended September 30, 2018 2017 Interest Expense Net Gains Total Change in Fair Interest Expense Net Gains Total Change in Fair Consolidated obligation bonds $ ) $ $ ) $ ) $ $ ) Consolidated obligation discount notes ) ) ) ) $ ) $ $ ) $ ) $ $ ) The following tables compare the aggregate fair value and aggregate remaining contractual principal balance outstanding of financial instruments for which the fair value option has been elected (in thousands): September 30, 2018 December 31, 2017 Aggregate Aggregate Fair Fair Value Aggregate Aggregate Fair Fair Value Advances (a) $ — $ — $ — $ $ $ Consolidated obligation bonds (b) $ $ $ ) $ $ $ Consolidated obligation discount notes (c) — — — $ $ $ ) $ $ $
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