Dark Pool Suspicions Haven't Destroyed Trading Volume: Chart

Despite regulatory fines and suspicions of wrongdoing, the share of U.S. stock trading on dark pools has barely budged for years, according to data from Rosenblatt Securities Inc. Following UBS Group AG and Investment Technology Group Inc.’s penalties last year, Barclays Plc and Credit Suisse Group AG this week agreed to pay more than $150 million settling allegations of misconduct on their platforms. Even amid regulatory probes, dark pools have proved to be vital tools for traders, letting large investors secretly buy and sell large blocks of shares without moving prices much.

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