shares of aon plc aon inched 006 higher to 30487 wednesday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 016 to 399105 and dow jones industrial average djia falling 026 to 3304509 aon plc closed 3711 short of its 52week high 34198 which the company reached on april 21st trading volume 622264 remained 154948 below its 50day average volume of 777212 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