Nasdaq reports another problem with its data feed

Wednesday, 4 Sep 2013 | 12:37 PM ET
Adam Jeffery | CNBC

The Nasdaq had yet another problem Wednesday with the main data feed that was at the center of its unprecedented outage nearly two weeks ago.

According to the exchange, a system called the "Securities Information Processor," or SIP, experienced an outage between 11:35 a.m. and 11:41 a.m.

The outage affected the exchange's ability to transmit quotes in stock symbols PC through SPZ.

But other market participants said the outage was worse than that. NYSE Arca said it stopped receiving inbound stock quotes on all Nasdaq symbols between 11:35 a.m. ET and 11:44 a.m. ET.

Greifeld: Need to be better at 'defensive driving'
Robert Greifeld, CEO, Nasdaq OMX Group, responds to yesterday's shutdown of the Nasdaq. We invest a lot of money in our systems, he says, but we need to be better at "defensive driving" when there are issues elsewhere that trigger a problem in your system.

The problem has now been resolved, Nasdaq said, and trading was not impacted.

(Read more: Nasdaq says software bug, Arca issues led to trading outage)

"The system successfully failed over and is operating normally," the exchange said in a 12:32 p.m. ET email.

Unlike the outage last month where updates from the Nasdaq were scarce, the exchange has been more responsive in getting out ahead of the issue and communicating with the public this time around.

A Securities and Exchange Commission spokesman said the agency is in contact with the Nasdaq and is monitoring developments related to the data feed problem.

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