Jump Trading LLC, was all but invisible until it was among six companies subpoenaed in April by New York prosecutors. Jump has ascended the ranks of high-frequency traders during the past 15 years to become one of the top firms on the Chicago Mercantile Exchange.
Money managers and brokers are shunning Barclays Plc’s dark pool after allegations the bank lied to clients about whether they would be dealing with high- frequency traders, according to people with knowledge of the matter.
The SEC basically thinks high-frequency trading is fine, but it knows you don't think that, and it wants to be tactful. It could just explain that markets aren't rigged, but "markets are rigged" is sort of unfalsifiable.