Weighted average maturity

(WAM).

The average maturity of securities held in a fixed income or money market fund.

WAM is calculated by taking the maturity of the fixed rate periods (rather than the final maturities) of the underlying instruments held by the fund, weighted according to the relative holdings per instrument.This is used to measure interest rate risk.

Also known as Average weighted maturity.

See also

• Average weighted maturity
• Currency basket
• Money market fund
• Weighted Average Life