Shares of Gerdau S.A. (NYSE:GGB – Get Free Report) gapped down before the market opened on Monday . The stock had previously closed at $5.09, but opened at $4.95. Gerdau shares last traded at $4.96, with a volume of 238,735 shares traded. Analyst Ratings Changes Separately, Scotiabank lowered shares of Gerdau from an “outperform” rating […]