We first provide evidence of some retail investors taking real trading (selling) decisions which are clearly sub-optimal even from an ex-ante perspective. We then show that these investors also exhibit stronger investment biases, namely, the disposition effect, underdiversification, preference...

Using granular data on the entire Brazilian securities lending market merged with all trades in the centralized stock exchange, we identify information leakage from short sellers. Our identification strategy explores trading execution mismatches between short sellers' selling activity in the...