shares of cigna corp ci shed 160 to 28838 friday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 280 to 363966 and dow jones industrial average djia falling 211 to 2929679 this was the stocks second consecutive day of losses cigna corp closed 791 short of its 52week high 29629 which the company reached on september 12th despite its losses the stock outperformed some of its competitors friday as unitedhealth group inc unh fell 275 to 50485 trading volume 20 m eclipsed its 50day average volume of 19 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