| Abstract: | We study the effect of the implementation of new Securities and Exchange Commission order-handling rules—the Limit Order Display Rule, the Quote Rule, and the Actual Size Rule—on NASDAQ's quoting and trading behavior. We find that the number of reported quotes increases and the bid-ask spread decreases following the implementation of the new rules. The decreased quoted depth associated with placement of individual investors' limit orders—the Limit Order Display Rule—outweighs the increased quoted depth associated with displaying institutional quotes—the Quote Rule. Further, the number of trade executions increases while the average trade size decreases. The volatility of trade-to-trade and midpoint returns decreases for the initial group of stocks subject to the rules, but not for the two subsequent groups. |
