On January 20, 1997, the Securities and Exchange Commission began requiring Nasdaq market makers to execute or display customer limit orders. In addition, Nasdaq began displaying quotes placed by market makers to execute or display customer limit orders. In addition, Nasdaq began displaying...

On May 26 and 27, 1994, several national newspapers reported the findings of Christie and Schultz (1994) who cannot reject the hypothesis that market makers of active NASDAQ stocks implicitly colluded to maintain spreads of at least $.25 by avoiding odd-eighth quotes. On May 27, dealers in...

This paper examines the intraday pattern of bid-ask spreads among NASDAQ stocks. We find that spreads are relatively stable throughout the day, but narrow significantly near the close. This contrasts with the U-shaped pattern for NYSE stocks reported by Brock and Kleidon (1992) and McInish and...

The NASDAQ multiple dealer market is designed to produce narrow bid-ask spreads through competition for order flow among individual dealers. However, we find that odd-eighth quotes are virtually non-existent for 71 of 100 actively traded NASDAQ securities, including Apple Computer and Lotus...