The NBBO for an average active stock is non-positive (locked or crossed) 10.58% and 4.05% of the time on, respectively, the NASDAQ and the NYSE inter-markets. Locks and crosses are frequent fleeting events that usually accompany significant price changes. Non-positive NBBOs arise because of (i)...

Blume and Goldstein [Journal of Finance 52, 1997, 221-244] suggest that quote competition between trading venues may diminish following tick size reductions. We test this suggestion by studying the competitive landscape in the NYSE-listed stocks before and after decimalization. We find that NBBO...

The study investigates competition in the market for NASDAQ stocks during a recent period in U.S. equity markets history when three major ECNs - Archipelago, Island, and Instinet - are identifiable in TAQ. We show that the ECNs compete with NASDAQ's SuperMontage on the basis of quotes, execution...

The study investigates competition in the market for NASDAQ stocks during a recent period in U.S. equity markets history when three major ECNs - Archipelago, Island, and Instinet - are identifiable in TAQ. We show that the ECNs compete with NASDAQ's SuperMontage on the basis of quotes, execution...

Nasdaq spreads decline from 1993 to 2002, largely independently of tick size reductions. Trade size declines, consistent with greater retail investor activity. Using the method of Chordia, Roll, and Subrahmanyam (2001), we find that concurrent market returns strongly affect liquidity and trading...

This study directly compares the level and return predictability of short selling for NYSE stocks to a matched sample of NASDAQ stocks. When considering trading that executes on all exchanges, we document that the NASDAQ has greater levels of short selling, relative to total trading activity,...

The NBBO for an average active stock is non-positive (locked or crossed) 10.58% and 4.05% of the time on, respectively, the NASDAQ and the NYSE inter-markets. Locks and crosses are frequent fleeting events that usually accompany significant price changes. Non-positive NBBOs arise because of (i)...

Research documents a U-shaped intraday pattern of returns (Wood et al., 1985, and Harris, 1986). This paper examines which trade sizes drive the U-shaped pattern. We find that intraday price changes from larger trades exhibit a U-shaped pattern while prices changes from smaller trades show a...

Using short-sale transactions data, we examine the relation between short selling and the weekend effect. We do not find that short selling is more abundant on Monday than on Friday, even for stocks that have higher Friday returns. We find that short sellers execute more short sale volume during...