NYSE 'normal' after seeing brief trading issues

NYSE Wall Street

The NYSE and the NYSE market experienced a brief issue involving publishing and receiving trades and quotes on Thursday.

The NYSE, on its website at 1:40 p.m. ET, blamed an issue with the SIP, or the Security Information Processor. This is the network that carries quotes and trades for exchanges.

About 10 minutes later,the website said its trading systems were functioning normally again. NYSE said clients with questions about the issue should contact its trading services desk.

Some of the exchanges cited problems with OPRA, or the Options Price Reporting Authority, which provides last sale information and current options quotes. It's an industry wide service for 12 options exchanges.

The Nasdaq blamed its August 2013 "flash freeze" on a problem with the SIP, which affected trading for an entire afternoon.

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-CNBC's Patti Domm and Ben Berkowitz contributed to this report.

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