Amihud's (2002) stock (il)liquidity measure averages daily ratios of absolute close-to-close return to dollar volume, including overnight returns, while trading volumes come from regular hours. Our modified measure addresses this mismatch by using open-to-close returns. It is more strongly...

We document new intraday trading patterns indicative of the key roles of endogenous trading responses of investors to variations in imperfectly-competitive liquidity provision. When measured in trade times of fixed dollar values, price impacts and volatility fall sharply from open to close, and...

We show that wholesalers internalize unbalanced amounts of retail order flow to provide liquidity to institutional investors. The Tick Size Pilot highlights how wholesaler incentives affect the magnitude and composition of internalized retail trade imbalances (Mroib, Boehmer et al.\ 2021). Large...