shares of udr inc udr slumped 036 to 4209 thursday on what proved to be an allaround great trading session for the stock market with the sp 500 index spx rising 062 to 429393 and the dow jones industrial average djia rising 050 to 3383361 udr inc closed 856 below its 52week high 5065 which the company reached on august 16th the stock demonstrated a mixed performance when compared to some of its competitors thursday as avalonbay communities inc avb rose 016 to 18640 equity residential eqr rose 066 to 6523 and midamerica apartment communities inc maa fell 123 to 15305 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