shares of aon plc aon advanced 122 to 30678 friday on what proved to be an allaround mixed trading session for the stock market with the dow jones industrial average djia rising 010 to 3442988 and the sp 500 index spx falling 012 to 407170 aon plc closed 3520 below its 52week high 34198 which the company achieved on april 21st trading volume 807606 remained 5780 below its 50day average volume of 813386 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