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Nasdaq halts equity options trading in new outage

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The Nasdaq OMX on Friday suffered yet another trading outage, its second in a week.

The market said in a statement that it halted trading on its secondary options market, at approximately 10:36 a.m. EDT. Nasdaq did not disclose the nature of the outage, but said equity options and other securities were trading normally.

On Tuesday, the second-largest U.S. exchange caused a 44-minute blackout at the height of afternoon trading on Wall Street, which the Nasdaq attributed to "human error."

(Read more: Nasdaq takes responsibility for August 'flash freeze')

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