(Reuters) Nasdaq OMX Group plans to roll out a “kill switch” that would cut off trading of its member firms when pre-set limits are breached, the exchange operator said in a regulatory filing.

Controlling risk has been a major focus for the securities industry in the wake of high-profile snafus like the August 2012 glitch at Knight Capital Group, now a part of KCG Holdings Inc , that sent a flood of errant orders to the NYSE, nearly sank the firm, and led to its takeover by rival Getco.

Knight was one of the biggest executors of U.S. trades and the incident, which cost the firm $461 million, highlighted the risks in the high-speed, nearly fully electronic market.

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