UPDATE 1-U.S. options trading halted due to systems glitch
(Adds background on recent outages)
NEW YORK, Sept 16 (Reuters) - At least four major U.S. options exchanges halted trading in early afternoon on Monday due to system issues at the centralized Options Price Reporting Authority, the latest prominent disruption to the operations of U.S. markets.
The OPRA is a computer system that disseminates options price quotes and completed trades from the exchanges and distributes these to market data vendors.
Nasdaq OMX PHLX, Miami Options Exchange, CBOE Holdings and C2 electronic exchange were all halted.
Trading on two of CBOE Holding Inc's securities exchanges was halted for more than half an hour last week as well due to unidentified technical problems with OPRA. U.S. options are traded on a dozen different venues, but problems with the price reporting authority can affect several exchanges at once.
Monday's issue comes three weeks after trading in thousands of U.S. stocks ground to a halt for much of the day on Aug. 22 after a technological problem shut down trading in all Nasdaq securities.
(Reporting by Rodrigo Campos; Editing by Diane Craft and Chris Reese)