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Is market fragmentation harming market quality?

机译:市场分裂会损害市场质量吗?

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摘要

We examine how fragmentation is affecting market quality in US equity markets. We use newly available trade reporting facilities (TRFs) data to measure fragmentation, and we use a variety of empirical approaches to compare execution quality and efficiency of stocks with more and less fragmented trading. We find that fragmentation affects all stocks; more fragmented stocks have lower transactions costs and faster execution speeds; and fragmentation is associated with higher short-term volatility but greater market efficiency, in that prices are closer to being a random walk. Our results that fragmentation does not appear to harm market quality are consistent with US markets being a single virtual market with multiple points of entry.
机译:我们研究了分散化如何影响美国股票市场的市场质量。我们使用新近可用的交易报告工具(TRF)数据来衡量碎片化,并且我们使用各种经验方法来比较碎片化交易越来越多的股票的执行质量和效率。我们发现分散影响所有股票。分散的股票越多,交易成本就越低,执行速度越快;零散与较高的短期波动性相关,但具有较高的市场效率,因为价格更接近随机波动。我们的结果表明,分散化不会损害市场质量,这与美国市场是具有多个切入点的单个虚拟市场一致。

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