FAIR VALUE OF FINANCIAL INSTRUMENTS
The following methods and assumptions were used to estimate the fair value of each of the following financial instruments:

Preferred Stock, Long-Term Debt and Rate Reduction Bonds:  The fair value of CL&P's and NSTAR Electric's preferred stock is based upon pricing models that incorporate interest rates and other market factors, valuations or trades of similar securities and cash flow projections.  The fair value of long-term debt and RRB debt securities is based upon pricing models that incorporate quoted market prices for those issues or similar issues adjusted for market conditions, credit ratings of the respective companies and treasury benchmark yields.  The fair values provided in the table below are classified as Level 2 within the fair value hierarchy.  Carrying amounts and estimated fair values are as follows:
 EversourceCL&PNSTAR ElectricPSNH
(Millions of Dollars)Carrying AmountFair ValueCarrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
As of December 31, 2025:
Preferred Stock Not Subject to Mandatory Redemption$155.6 $126.1 $116.2 $92.9 $43.0 $33.2 $— $— 
Long-Term Debt28,265.4 27,055.5 5,110.1 4,844.7 5,945.6 5,752.6 2,031.3 1,874.8 
Rate Reduction Bonds324.1 320.2 — — — — 324.1 320.2 
As of December 31, 2024:
Preferred Stock Not Subject to Mandatory Redemption$155.6 $123.8 $116.2 $90.3 $43.0 $33.5 $— $— 
Long-Term Debt26,704.8 24,791.4 5,111.1 4,705.8 5,094.9 4,759.4 1,732.1 1,529.7 
Rate Reduction Bonds367.3 352.1 — — — — 367.3 352.1 

Derivative Instruments and Marketable Securities: Derivative instruments and investments in marketable securities are carried at fair value.  For further information, see Note 4, "Derivative Instruments," and Note 5, "Marketable Securities," to the financial statements.  

See Note 1H, "Summary of Significant Accounting Policies – Fair Value Measurements," for the fair value measurement policy and the fair value hierarchy.

Historical Timeline

Fiscal YearFiled
2025Feb 17, 2026Showing above
2018Feb 26, 2019
2017Feb 26, 2018
2016Feb 23, 2017

About Fair Value Disclosures

Fair value disclosures classify all assets and liabilities measured at fair value into a three-level hierarchy: Level 1 (quoted market prices), Level 2 (observable inputs like yield curves), and Level 3 (unobservable inputs requiring management estimates). The proportion of Level 3 assets directly reflects how much of the balance sheet depends on internal models rather than market evidence.

Key signals: a growing Level 3 balance relative to total fair-value assets increases valuation uncertainty and earnings volatility risk. Watch for transfers between levels — assets moving from Level 2 to Level 3 often signal deteriorating market liquidity. Unrealized gains and losses on Level 3 positions flow through earnings or other comprehensive income, so large swings deserve scrutiny. For financial institutions, examine the sensitivity disclosures that show how Level 3 valuations change under alternative assumptions. Compare the fair value of debt against its carrying amount to gauge hidden leverage.