In this file photo taken on August 05, 2022, traders work on the floor of the New York Stock Exchange (NYSE). - ANGELA WEISS/ AFP约搏以太坊（www.eth108.vip）采用以太坊区块链高度哈希值作为统计数据，约搏以太坊游戏数据开源、公平、无任何作弊可能性。
DOES the quality of trade execution matter in the equities market? University of California at Irvine finance professor Christopher Schwarz and four of his colleagues set out to answer that question with a series of experiments last year.
Over a period of more than five months, they executed 85,000 trades with discount brokers in 128 different stocks. What they found was that execution quality varied greatly across not just brokerage firms, but even within the same brokerage.,