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Servicing of Financial Assets (Tables)
6 Months Ended
Jun. 30, 2022
Transfers and Servicing of Financial Assets [Abstract]  
Schedule of Residential Mortgage Servicing Rights Under The Fair Value Measurement Method
The table below presents an analysis of residential MSRs under the fair value measurement method:
 Three Months Ended June 30Six Months Ended June 30
 2022202120222021
 (In millions)
Carrying value, beginning of period$542 $401 $418 $296 
Additions10 19 29 40 
Purchases(1)
181 26 256 37 
Increase (decrease) in fair value:
Due to change in valuation inputs or assumptions52 (38)99 52 
Economic amortization associated with borrower repayments(2)
(15)(16)(32)(33)
Carrying value, end of period$770 $392 $770 $392 
________
(1)Purchases of residential MSRs can be structured with cash hold back provisions, therefore the timing of payment may be made in future periods.
(2)Includes both total loan payoffs as well as partial paydowns. Regions' MSR decay methodology is a discounted net cash flow approach.
Data And Assumptions Used In The Fair Value Calculation As Well As The Valuation's Sensitivity To Rate Fluctuations Related To Residential Mortgage Servicing Rights
Data and assumptions used in the fair value calculation, as well as the valuation’s sensitivity to rate fluctuations, related to residential MSRs (excluding related derivative instruments) are as follows:
 June 30
 20222021
 (Dollars in millions)
Unpaid principal balance$52,965 $35,519 
Weighted-average CPR (%)7.9 %10.5 %
Estimated impact on fair value of a 10% increase$(66)$(27)
Estimated impact on fair value of a 20% increase$(107)$(49)
Option-adjusted spread (basis points)480571 
Estimated impact on fair value of a 10% increase$(17)$(9)
Estimated impact on fair value of a 20% increase$(34)$(19)
Weighted-average coupon interest rate3.4 %3.7 %
Weighted-average remaining maturity (months)309292
Weighted-average servicing fee (basis points)27.1 27.3 
Servicing Asset at Amortized Cost
The table below presents an analysis of commercial MSRs under the amortization measurement method:
Three Months Ended June 30Six Months Ended June 30
2022202120222021
(In millions)(In millions)
Carrying value, beginning of period$82 $82 $86 $74 
Additions19 
Economic amortization associated with borrower repayments(1)
(5)(4)(9)(7)
Carrying value, end of period$82 $86 $82 $86 
________
(1)Includes both total loan payoffs as well as partial paydowns.