Markets have been volatile and we believe that they will remain volatile until the U.S. Securities and Exchange Commission begins to rein in the activities of the high frequency trading community.

市场一直不稳定。我们相信市场会继续波动，直到美国证券交易委员会着手管理高频率交易团伙的活动。

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“People are trading news at very high frequency,” he said. “People worry about that.”

他说：“有人以非常高的频率作新闻交易，人们对此有所担心。”

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The arrest of a former Goldman Sachs employee in July for allegedly stealing the firm's proprietary computer codes thrust the arcane world of high-frequency trading (HFT) into the spotlight.

七月，一名前高盛员工因涉嫌盗窃该公司专有的计算机代码而被捕，这一事件将神秘的高频交易(HFT)世界推到了聚光灯下。

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There are lots of ways to tweak Colby's strategy, such as dialing back on trading frequency and restricting the list to North American stocks or certain industry groups.

FORBES: Surfin' ETFs

Quill said some firms are turning to cross-asset trading because the high frequency trading (HFT) business is now dominated by ultra high frequency trading firms whose massive investments in sophisticated hardware like FPGAs has made it difficult for smaller players to compete.

FORBES: Chicago's Sun Trading Consolidates Asset Classes on Kx

The Securities and Exchange Commission has been studying a number of proposals that would put an extra burden on firms engaged in high frequency trading strategies or on firms assisting other firms with high frequency trading.

FORBES: Regulator Takes Aim at High Frequency Traders