shares of udr inc udr dropped 052 to 3850 monday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 016 to 397753 and the dow jones industrial average djia rising 060 to 3243208 udr inc closed 2151 short of its 52week high 6001 which the company reached on april 21st the stock underperformed when compared to some of its competitors monday as avalonbay communities inc avb rose 056 to 15861 equity residential eqr rose 034 to 5618 and midamerica apartment communities inc maa fell 010 to 14319 trading volume 14 m remained 11 million below its 50day average volume of 26 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