shares of aon plc aon rose 130 to 31773 monday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 061 to 411108 and dow jones industrial average djia falling 010 to 3389102 aon plc closed 2425 short of its 52week high 34198 which the company achieved on april 21st trading volume 796927 remained 8747 below its 50day average volume of 805674 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