shares of american tower reit amt shed 314 to 21213 thursday on what proved to be an allaround dismal trading session for the stock market with the sp 500 index spx falling 116 to 380810 and dow jones industrial average djia falling 102 to 3293008 the stocks fall snapped a twoday winning streak american tower reit closed 7034 below its 52week high 28247 which the company achieved on august 15th the stock demonstrated a mixed performance when compared to some of its competitors thursday as crown castle inc cci fell 181 to 14075 and sba communications corp sbac fell 385 to 28137 trading volume 15 m remained 451817 below its 50day average volume of 19 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