We study the relation between order imbalance and past returns and firm characteristics and testa number of hypothesis including the disposition effect, momentum and contrarian trading, taxlossselling and flight-to-quality hypothesis. These hypotheses make predictions about investors’buy or...

Pairwise stock correlations increase by 27% on average when stock returns arenegative. It is trading activity in small stocks that leads to higher correlationswhen returns are negative. We provide evidence consistent with the hypothesisthat co-ordinated selling by retail investors drives this...