Econometric Models of the Eleventh District Cost of Funds Index

Wayne Passmore

The Journal of Real Estate Finance and Economics, 1993, vol. 6, issue 2, 175-88

Abstract: The Eleventh District Cost of Funds Index (COFI) is a popular index for pricing adjustable-rate mortgages. COFI is calculated from the interest expenses incurred by thrifts when raising funds. It is a mixture of current and past interest rates on many different financial instruments. COFI can be modeled well with simple econometric models. Commonly used, simple COFI models are compared using a method developed by Hendry (1989). Some of these models, which appear to fit the data well, have nonrobust parameters, significant serial correlation, and heteroscedastic errors. These poorly specified models may lead to systematic mispricing of COFI mortgages. Once a robust econometric model is chosen, the lagged adjustment of COFI to movements in interest rates can be incorporated into mortgage pricing models. Copyright 1993 by Kluwer Academic Publishers

Date: 1993
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