We find that Robinhood ownership changes are unrelated with future returns, suggesting that zero-commission investors behave as noise traders. We exploit Robinhood platform outages to identify the causal effects of commission-free traders on financial markets. Exogenous negative shocks to...

Passive investing, particularly in emerging markets, has become an increasingly popular means of quick, “diversified” exposure to a particular segment of the markets. Defensive investors, as Benjamin Graham noted, would be best served owning a diversified list of leading companies. Yet it's...

Systematic, rules-based investment strategies are where academia and practice are currently interacting strongly. My objective in this editorial is to offer some thoughts on research on systematic investing, including three articles in this issue, that can provide significant practical benefits...

We show meetings of investors and firms convey information about expected returns. Investors frequently travel to meet in-person with firms before investing, and we show firms with abnormally frequent meetings predictably outperform firms with abnormally infrequent meetings by roughly 70-to-100...

Using a large panel of U.S. accounts trades and positions, we show that retail investors trade as contrarians after large earnings surprises, especially for loser stocks, and such contrarian trading contributes to post earnings announcement drift (PEAD) and momentum. Indeed, when we double-sort...

InvestorLit is a subscription service providing reviews of institutional investment literature. The reviews cover a wide range of investment topics and are published online. Bruce Grantier, founder of InvestorLit, is a member of the Brandes Institute Advisory Board. Members of the InvestorLit...

Passive investing, particularly in emerging markets, has become an increasingly popular means of quick, “diversified” exposure to a particular segment of the markets. Flows into passive emerging market products have been so strong that assets in exchange-traded funds (ETFs) designed to...

Using a unique data set of complete trade records, we find that large individual investors are successful at picking stocks. Large individual investors' correlated trades not only can move synchronous stock prices but also can positively predict future returns. More importantly, large individual...