Abstract We compare reactions in the prices and trading patterns of common stocks and closed-end funds (CEFs), which have substantially di¤erent investor clienteles, to the September 11, 2001 terrorist attacks. When the market reopened six days later, retail investors sold and there were sharp price declines-even in assets with net institutional buying. In the subsequent two weeks, price reversals were substantially security-speci…c and thus not simply due to improved systematic sentiment. Consistent with microstructure theory, comparisons between CEFs and common stocks show the speed of these reversals depended signi…cantly on the relative quality and availability of information about fundamental values