SWEPCo Uncertainty of Fair Value Measurements 348 The following table provides the measurement uncertainty of fair value measurements to increases (decreases) in significant unobservable inputs related to Energy Contracts, Natural Gas Contracts, FTRs and Other Investments for the Registrants as of December 31, 2020 and 2019: (d) Represents percentage discount applied to the publically available share price. (c) The weighted-average is the product of the forward market price of the underlying commodity and volume weighted by term. (b) Represents market prices in dollars per MMBtu. (a) Represents market prices in dollars per MWh. Significant Unobservable Input Position Change in Input Impact on Fair Value Measurement Forward Market Price Buy Increase (Decrease) Higher (Lower) Forward Market Price Sell Increase (Decrease) Lower (Higher) Liquidity Adjustment Buy Increase (Decrease) Lower (Higher) December 31, 2019 Significant Input/Range Fair Value Valuation Unobservable Weighted Assets Liabilities Technique Input Low High Average (c) (in millions) Natural Gas Contracts $ —  $ 4.9  Discounted Cash Flow Forward Market Price (b) $ 1.89  $ 2.51  $ 2.18  FTRs 6.5  0.2  Discounted Cash Flow Forward Market Price (a) (8.52) 0.85  (2.31) Total $ 6.5  $ 5.1  December 31, 2020 Significant Input/Range Fair Value Valuation Unobservable Weighted Assets Liabilities Technique Input Low High Average (c) (in millions) Natural Gas Contracts $ —  $ 1.7  Discounted Cash Flow Forward Market Price (b) $ 2.18  $ 2.77  $ 2.41  FTRs 3.3  —  Discounted Cash Flow Forward Market Price (a) (6.93) 0.48  (1.93) Total $ 3.3  $ 1.7 