AVERAGE COUPON - A calculation of the total interest cost for a bond issue expressed as a percentage. The average coupon is equal to the total interest payments of an issue divided by bond year dollars.
Weighted average Coupon
The weighted average of the gross interest rates of mortgages underlying a pool as of the pool issue date; the balance of each mortgage is used as the weighting factor.
Weighted average life
See: Average life ...
Weighted average coupon (WAC)
The weighted average interest rate of the underlying mortgage loans or pools that serve as collateral for a security, weighted by the size of the principal loan balances.
Weighted average loan age (WALA) ...
Weighted Average Coupon (WAC): The average coupon rate of a group of securities or mortgage loans.
WAC (Weighted-average coupon) - The weighted average of the interest rates on the mortgage loans underlying the MBS that back the REMIC or the weighted average of the WACs of the individual MBS pools backing the REMIC.
The point when the weighted-average coupon of an MBS is at a level to induce homeowners to prepay the mortgage in order to refinance to a lower-rate mortgage, ...
A Delay of typically about three months between the time the weighted-average Coupon of an MBS Pool crosses the Threshold for refinancing and observation of an acceleration in Prepayment speed is observed.
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 See also: Average, Coupon, Option, Rate, Market
  
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