shares of nrg energy inc nrg slipped 191 to 3185 thursday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 249 to 389575 and dow jones industrial average djia falling 225 to 3320222 this was the stocks second consecutive day of losses nrg energy inc closed 1597 below its 52week high 4782 which the company reached on may 26th the stock underperformed when compared to some of its competitors thursday as duke energy corp duk fell 076