shares of exelon corp exc shed 023 to 4429 friday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 008 to 389938 and dow jones industrial average djia falling 015 to 3133815 the stocks fall snapped a twoday winning streak exelon corp closed 642 short of its 52week high 5071 which the company reached on april 21st