This paper develops a nancial mechanism which integrates housing and the real econ- omy through housing-secured debt. In this environment, movements in home prices are ampli ed through both borrowers and banks' balance sheets, leading to a self-reinforcing credit/liquidity crunch. When placed...

Explanations of why changes in the relative quantities of safe debt seem to affect asset prices often appeal informally to a “portfolio balance” mechanism. I show how this type of effect can be incorporated in a general class of structural, arbitrage-free asset-pricing models using a...