shares of aon plc aon inched 044 higher to 27903 tuesday on what proved to be an allaround favorable trading session for the stock market with the sp 500 index spx rising 202 to 408885 and the dow jones industrial average djia rising 134 to 3265459 aon plc closed 6295 short of its 52week high 34198 which the company reached on april 21st the stock underperformed when compared to some of its competitors tuesday as moodys corp mco rose 177 to 29286 equifax inc efx rose 068 to 19732 and orix corp adr ix rose 217 to 8948 trading volume 598343 remained 550693 below its 50day average volume of 11 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