U.S. retail brokers warn 'tick size' plan to boost investor costs
December 23, 2014 at 15:47 PM EST
NEW YORK, Dec 23 (Reuters) - A plan by the U.S. Securities and Exchange Commission to widen the minimum trading increments of some small-cap stocks to test if that would spur more trading could end up harming mom-and-pop investors, retail brokerages said in letters to the regulator.