shares of plug power inc plug slid 211 to 787 thursday on what proved to be an allaround great trading session for the stock market with the nasdaq composite index comp rising 151 to 1268884 and the dow jones industrial average djia rising 034 to 3353591 plug power inc closed 2369 short of its 52week high 3156 which the company reached on august 25th the stock underperformed when compared to some of its competitors thursday as air products  chemicals inc apd fell 027 to 27545 procter  gamble co pg fell 164 to 15253 and ballard power systems inc bldp fell 044 to 453 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