Trading in options was restored at major exchanges after an earlier glitch halted trading. At least four major U.S. options exchanges reported problems in the early afternoon on Monday.
Options trading was halted on all the major U.S. exchanges at 1:40pm ET because of an apparent quote dissemination problem related to OPRA, a so-called utility for the industry operated by the 11 major exchanges.
Between 12:30 ET and 1:40 ET, inaccurate quotes were being sent to vendors like online brokerages. OPRA stands for the Options Price Reporting Authority and is run jointly by the CBOE, AMEX, ARCA, BATS, BX, BSE, C2, ISE, MIAX, Nasdaq and PHLX.