Following the computer mishap that spewed orders through stock exchanges on Wednesday and led to a $440 million loss at market maker Knight Capital Group, the SEC is speeding efforts to require exchanges and other market centers to ensure the "capacity and integrity of their systems."

Securities and Excnage Commission Chairwoman Mary Schapiro said in a statement on Thursday that she has directed SEC staff to convene a roundtable in the coming weeks to discuss "further steps that can be taken to address these critical issues."

The apparent trading error by Knight Capital Group on Wednesday "reflects the type of event that can raise concerns for investors about our nation's equity markets—markets that I believe are the most resilient, efficient and robust in the world," Schapiro said.

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