Stock volatility, ETF rise drive rethink of post-flash crash U.S. rules
September 02, 2015 at 20:17 PM EDT
NEW YORK, Sept 2 (Reuters) - U.S. regulators and stock exchanges are re-examining rules designed to ensure orderly trading in equities after investors fell afoul of them during a near-unprecedented bout of volatility at the beginning of last week, exchange officials said.