shares of progressive corp pgr plunged 1312 to 11478 thursday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 085 to 451004 and the dow jones industrial average djia rising 014 to 3439514 this was the stocks second consecutive day of losses progressive corp closed 3509 short of its 52week high 14987 which the company achieved on april 11th the stock underperformed when compared to some of its competitors thursday as chubb ltd cb fell 015 to 19000 american international group inc aig rose 041 to 5889 and arthur j gallagher  co ajg fell 049 to 21383 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