shares of omnicom group inc omc slumped 017 to 6959 wednesday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 029 to 414077 and the dow jones industrial average djia rising 018 to 3296923 this was the stocks fourth consecutive day of losses omnicom group inc closed 2202 below its 52week high 9161 which the company reached on february 10th the stock underperformed when compared to some of its competitors wednesday as publicis groupe sa adr pubgy rose 033 to 1226 and interpublic group of cos ipg fell 003 to 2879 trading volume 748721 remained 684891 below its 50day average volume of 14 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