shares of simon property group inc spg slid 138 to 11769 monday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 179 to 399884 and dow jones industrial average djia falling 140 to 3394710 simon property group inc closed 4814 short of its 52week high 16583 which the company achieved on january 5th the stock demonstrated a mixed performance when compared to some of its competitors monday as realty income corp o fell 105 to 6224 kimco realty corp kim fell 221 to 2211 and regency centers corp reg fell 150 to 6482 trading volume 15 m remained 589558 below its 50day average volume of 20 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