Lehman Brothers Mortgage-Backed Securities Index

Definition:

A benchmark index that includes 15- and 30-year fixed-rate securities backed by mortgage pools of the Government National Mortgage Association (GNMA), Federal Home Loan Mortgage Corporation (FHLMC), and Federal National Mortgage Association (FNMA).

Investing Essentials


Copyright © 2011 Campbell R. Harvey, Professor of Finance, Fuqua School of Business at Duke University

Term of the Day

Implied volatility

The expected volatility in a stock's return derived from its option price, maturity date, exercise price, and riskless rate of return, using an option pricing model such as Black-Scholes.

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