Irrational call option

Definition:

The implied call imbedded in a MBS. Irrational because the call is sometimes not exercised when it is in the money (interest rates are below the threshold to refinance), and sometimes exercised when it is not in the money. Option exercise like this affects payments on the MBS.

Investing Essentials


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

Term of the Day

Minimum maintenance

The lowest required equity level that must be held with a broker in a margin account. See: margin call.

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