shares of aon plc aon inched 031 higher to 31949 tuesday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 020 to 3563068 and the sp 500 index spx falling 027 to 457673 aon plc closed 2788 below its 52week high 34737 which the company achieved on june 30th trading volume 707834 remained 126640 below its 50day average volume of 834474 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