shares of plug power inc plug slid 397 to 846 wednesday on what proved to be an allaround grim trading session for the stock market with the nasdaq composite index comp falling 061 to 1248416 and dow jones industrial average djia falling 077 to 3279992 this was the stocks second consecutive day of losses plug power inc closed 2310 short of its 52week high 3156 which the company achieved on august 25th the stock underperformed when compared to some of its competitors wednesday as air products  chemicals inc apd fell 024 to 27084 procter  gamble co pg fell 083 to 14633 and ballard power systems inc bldp fell 372 to 440 trading volume 207 m remained 12 million below its 50day average volume of 219 m 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