Error Prompts Nearly Full-Day Shutdown of ISE Options Markets
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The two U.S. options markets run by International Securities Exchange Holdings Inc. were closed for most of Monday’s session due to a technology malfunction.
The International Securities Exchange and its smaller sibling, ISE Gemini, were halted at about 9:45 a.m. New York time and never reopened, said spokeswoman Molly McGregor. The venues had accounted for about 12 percent of all U.S. options trading in December, according to Options Clearing Corp. data.