shares of ppg industries inc ppg slumped 093 to 13801 wednesday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 041 to 409195 and dow jones industrial average djia falling 011 to 3364650 the stocks fall snapped a twoday winning streak ppg industries inc closed 325 below its 52week high 14126 which the company reached on april 11th the stock underperformed when compared to some of its competitors wednesday as 3m co mmm fell 018