Frequently, the response of housing markets to a large negative demand
shock is a period during which the liquidity of housing declines, but
the price at which transactions take place changes little. In this pa
per we show that a decline in liquidity can result from the inabilitie
s of sellers and buyers to insure against post-shock price uncertainty
. We conclude, that the introduction of a risk-sharing contingent pric
e contract may increase the post-shock liquidity of housing by providi
ng insurance against post-shock price uncertainty. Finally, we show th
at a mutually agreeable contingent price contract will always exist, e
ven when sellers are excessively optimistic.