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MARKETABLE SECURITIES | 3 Months Ended
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Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
MARKETABLE SECURITIES | MARKETABLE SECURITIES Eversource holds marketable securities that are primarily used to fund certain non-qualified executive benefits. The trusts that hold these marketable securities are not subject to regulatory oversight by state or federal agencies. Eversource’s marketable securities also include CYAPC and YAEC legally restricted trusts that each hold equity and available-for-sale debt securities to fund the spent nuclear fuel removal obligations of their nuclear fuel storage facilities. Equity and available-for-sale debt marketable securities are recorded at fair value, with the current portion recorded in Prepayments and Other Current Assets and the long-term portion recorded in Marketable Securities on the balance sheets. Equity Securities: Unrealized gains and losses on equity securities held in Eversource's non-qualified executive benefit trust are recorded in Other Income, Net on the statements of income. The fair value of these equity securities as of March 31, 2022 and December 31, 2021 was $31.5 million and $40.2 million, respectively. For the three months ended March 31, 2022 and 2021, there were unrealized losses of $4.4 million and unrealized gains of $1.1 million recorded in Other Income, Net related to these equity securities, respectively. Eversource's equity securities also include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts, which had fair values of $195.5 million and $214.0 million as of March 31, 2022 and December 31, 2021, respectively. Unrealized gains and losses for these spent nuclear fuel trusts are subject to regulatory accounting treatment and are recorded in Marketable Securities with the corresponding offset to long-term liabilities on the balance sheets, with no impact on the statements of income. Available-for-Sale Debt Securities: The following is a summary of the available-for-sale debt securities:
| As of March 31, 2022 |  | As of December 31, 2021
Eversource (Millions of Dollars) | Amortized Cost |  | Pre-Tax Unrealized Gains |  | Pre-Tax Unrealized Losses |  | Fair Value |  | Amortized Cost |  | Pre-Tax Unrealized Gains |  | Pre-Tax Unrealized Losses |  | Fair Value
Debt Securities | $ | 211.4 |  |  | $ | 0.5 |  |  | $ | (3.6) |  |  | $ | 208.3 |  |  | $ | 214.5 |  |  | $ | 5.1 |  |  | $ | (0.2) |  |  | $ | 219.4 |
Eversource's debt securities include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts in the amounts of $183.4 million and $189.9 million as of March 31, 2022 and December 31, 2021, respectively. Unrealized gains and losses on available-for-sale debt securities held in Eversource's non-qualified benefit trust are recorded in Accumulated Other Comprehensive Income, excluding amounts related to credit losses or losses on securities intended to be sold, which are recorded in Other Income, Net. There have been no significant unrealized losses and no credit losses for the three months ended March 31, 2022 and 2021, and no allowance for credit losses as of March 31, 2022. Factors considered in determining whether a credit loss exists include adverse conditions specifically affecting the issuer, the payment history, ratings and rating changes of the security, and the severity of the impairment. For asset-backed debt securities, underlying collateral and expected future cash flows are also evaluated. Debt securities included in Eversource's non-qualified benefit trust portfolio are investment-grade bonds with a lower default risk based on their credit quality. As of March 31, 2022, the contractual maturities of available-for-sale debt securities were as follows:
Eversource (Millions of Dollars) | Amortized Cost |  | Fair Value
Less than one year (1) | $ | 27.0 |  |  | $ | 27.0 |
One to five years | 61.9 |  |  | 61.6 |
Six to ten years | 36.3 |  |  | 35.5 |
Greater than ten years | 86.2 |  |  | 84.2 |
Total Debt Securities | $ | 211.4 |  |  | $ | 208.3 |
(1) Amounts in the Less than one year category include securities in the CYAPC and YAEC spent nuclear fuel trusts, which are restricted and are classified in long-term Marketable Securities on the balance sheets. Realized Gains and Losses: Realized gains and losses are recorded in Other Income, Net for Eversource's benefit trust and are offset in long-term liabilities for CYAPC and YAEC. Eversource utilizes the specific identification basis method for the Eversource non-qualified benefit trust, and the average cost basis method for the CYAPC and YAEC spent nuclear fuel trusts to compute the realized gains and losses on the sale of marketable securities. Fair Value Measurements: The following table presents the marketable securities recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy:
Eversource (Millions of Dollars) | As of March 31, 2022 |  | As of December 31, 2021
Level 1: |  |  |
Mutual Funds and Equities | $ | 227.0 |  |  | $ | 254.2 |
Money Market Funds | 26.0 |  |  | 31.3 |
Total Level 1 | $ | 253.0 |  |  | $ | 285.5 |
Level 2: |  |  |
U.S. Government Issued Debt Securities (Agency and Treasury) | $ | 80.0 |  |  | $ | 81.3 |
Corporate Debt Securities | 62.5 |  |  | 65.3 |
Asset-Backed Debt Securities | 11.6 |  |  | 12.6 |
Municipal Bonds | 11.7 |  |  | 12.3 |
Other Fixed Income Securities | 16.5 |  |  | 16.6 |
Total Level 2 | $ | 182.3 |  |  | $ | 188.1 |
Total Marketable Securities | $ | 435.3 |  |  | $ | 473.6 |
U.S. government issued debt securities are valued using market approaches that incorporate transactions for the same or similar bonds and adjustments for yields and maturity dates. Corporate debt securities are valued using a market approach, utilizing recent trades of the same or similar instruments and also incorporating yield curves, credit spreads and specific bond terms and conditions. Asset-backed debt securities include collateralized mortgage obligations, commercial mortgage backed securities, and securities collateralized by auto loans, credit card loans or receivables. Asset-backed debt securities are valued using recent trades of similar instruments, prepayment assumptions, yield curves, issuance and maturity dates, and tranche information. Municipal bonds are valued using a market approach that incorporates reported trades and benchmark yields. Other fixed income securities are valued using pricing models, quoted prices of securities with similar characteristics, and discounted cash flows.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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