UPDATE 1-U.S. SEC OKs 'tick size' pilot, to include 'trade-at' rule
May 06, 2015 at 18:11 PM EDT
WASHINGTON, May 6 (Reuters) - U.S. regulators approved a new study on Wednesday that calls for widening the increments, or "ticks," at which smaller companies' stocks are priced to see if this helps improve market liquidity.