shares of omnicom group inc omc slid 084 to 7330 thursday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 016 to 447375 and dow jones industrial average djia falling 018 to 3475132 omnicom group inc closed 1308 below its 52week high 8638 which the company reached on may 10th the stock demonstrated a mixed performance when compared to some of its competitors thursday as publicis groupe sa adr pubgy rose 024 to 1685 and interpublic group of cos ipg fell 157 to 3707 trading volume 11 m remained 395284 below its 50day average volume of 15 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