The Nasdaq OMX Group (NDAQ 0.83%) says the Nasdaq Stock Market experienced a brief technological issue in morning trading today.

The company issued a press release with details of the incident, which was isolated. Between 11:35 a.m. EDT and 11:41 a.m. EDT, according to the announcement, "the Securities Information Processor (SIP) experienced a brief outage in one of the quote dissemination channels." In particular, the symbols PC through SPZ suffered during the outage, though "trading has not been affected."

The hiccup comes two weeks after Nasdaq experienced far more severe problems with its system that forced the electronic exchange to halt trading entirely for more than three hours. That outage was also blamed on the exchange's price quote disseminating system.

In Washington, Securities and Exchange Commission spokesman John Nester said the agency is in contact with the exchange and monitoring developments, as is its practice in these situations.

In the wake of last month's extended outage, Securities and Exchange Commission Chair Mary Jo White released a statement emphasizing that even though trading resumed before the day's end, the glitch was "nonetheless serious." In the Aug. 22 statement she vowed to "accelerate ongoing efforts to further strengthen our markets." 

-- Material from The Associated Press was used in this report.