shares of american tower reit amt shed 170 to 26541 thursday on what proved to be an allaround poor trading session for the stock market with the sp 500 index spx falling 119 to 430754 and dow jones industrial average djia falling 159 to 3384392 american tower reit closed 3831 below its 52week high 30372 which the company reached on september 8th the stock underperformed when compared to some of its competitors thursday as crown castle international corp cci fell 139 to 17332 rogers communications inc cl b rci fell 080 to 5915 and sba communications corp sbac fell 066 to 33057 trading volume 19 m eclipsed its 50day average volume of 14 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