shares of plug power inc plug shed 505 to 902 tuesday on what proved to be an allaround grim trading session for the stock market with the nasdaq composite index comp falling 004 to 1215341 and dow jones industrial average djia falling 003 to 3397663 plug power inc closed 2254 short of its 52week high 3156 which the company reached on august 25th the stock underperformed when compared to some of its competitors tuesday as air products  chemicals inc apd rose 055 to 28778 procter  gamble co pg rose 011 to 15121 and ballard power systems inc bldp fell 359 to 484 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