Dealers enter nonbinding expressions of interest during the Nasdaq preopening to promote price discovery and ease stock inventory management when the market opens. But does this practice of “indicating ahead” constitute best execution for an individual customer? Arguments in favor of the practice rely on the notion that best execution is a general condition as opposed to a concept applicable on a trade-by-trade basis. Some customers must sacrifice in individual instances to improve the functioning of the overall market. But the practice of indicating ahead violates the dealer agent's duty of loyalty to her individual customer. Moreover, the dealer's financial self-interest is best served by indicating ahead. Journal of Economic Literature Classification Numbers: G10, G18, K22.

This paper studies Nasdaq market makers' activities during the one and one‐half hour preopening period. Price discovery during the preopening is conducted via price signaling as opposed to the auction used to open the NYSE or the continuous market used during trading. In the absence of trades, Nasdaq dealers use crossed and locked inside quotes to signal to other market makers which direction the price should move. Furthermore, we find evidence of price leadership among market makers that bears little resemblance to their IPO/SEO lead underwriter participation.

This article tests for differences in execution costs among specialist firms for New York Stock Exchange listed securities. Execution cost differences provide a measure of the relative performance of specialist firms. We find a substantial difference in effective spreads and order processing costs across specialist firms, controlling for stock characteristics. While economically significant, the differences in execution costs between specialist firms are much smaller than the cross‐market differences reported by Huang and Stoll (1996). Within a specialist firm, there is a positive relation between order processing costs and trading activity that is consistent with the hypothesis that active stocks subsidize inactive stocks.

This article tests for differences in execution costs among specialist firms for New York Stock Exchange listed securities. Execution cost differences provide a measure of the relative performance of specialist firms. The authors find a substantial difference in effective spreads and order processing costs across specialist firms, controlling for stock characteristics. While economically significant, the differences in execution costs between specialist firms are much smaller than the cross-market differences reported by Roger Huang and Hans Stoll (1996). Within a specialist firm, there is a positive relation between order processing costs and trading activity that is consistent with the hypothesis that active stocks subsidize inactive stocks.

We examine the impact of trading on markets partially exempt from National Market System requirements (“dark venues”) on equity-market quality. We find evidence consistent with the notion that dark venues rely on their special features to segregate order flow based on asymmetric information risk, which results in their transactions being less informed and contributing less to price discovery on the consolidated market. Except for the execution of large transactions and trading in small stocks, the effects of dark-venue order segmentation are damaging to overall market quality. Our results have important implications for the regulation of international equity markets.