shares of ppg industries inc ppg shed 254 to 13341 wednesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 073 to 411524 and dow jones industrial average djia falling 077 to 3279992 this was the stocks fourth consecutive day of losses ppg industries inc closed 1210 short of its 52week high 14551 which the company reached on april 24th the stock demonstrated a mixed performance when compared to some of its competitors wednesday as 3m co mmm fell 368 to 9699 and sherwinwilliams co shw rose 076 to 22878 editors note this story was autogenerated by automated insights an automation technology provider using data from dow jones and factset see our market data terms of use