shares of nrg energy inc nrg slumped 054 to 3312 monday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 020 to 427379 and dow jones industrial average djia falling 059 to 3356286 nrg energy inc closed 1347 below its 52week high 4659 which the company reached on june 6th the stock underperformed when compared to some of its competitors monday as duke energy corp duk rose 054 to 9016 exelon corp exc rose 073 to 3998 and sempra sre rose 030 to 14501 trading volume 36 m remained 958404 below its 50day average volume of 46 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