U.S. regulators, intensifying their probe of last year's "flash crash" and other market swings, have sent subpoenas to firms that do high-frequency trading, according to the Wall St Journalistas
High-frequency traders use computer models to identify price discrepancies and directions of securities trading, aiming to profit through rapid-fire trades often measured in milliseconds. Regulators' interest in these traders has ramped up in recent years, as their influence on markets has expanded amid advances and investments in trading technology.
The flash crash on May 6, 2010, which saw the Dow Jones Industrial Average plunge 700 points in minutes, heightened criticism ...
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