shares of crown castle international corp cci shed 030 to 18973 thursday on what proved to be an allaround grim trading session for the stock market with the sp 500 index spx falling 058 to 447000 and dow jones industrial average djia falling 054 to 3521312 this was the stocks fourth consecutive day of losses crown castle international corp closed 1489 below its 52week high 20462 which the company achieved on july 20th the stock underperformed when compared to some of its competitors thursday as america movil sab de cv series a amxa remained unchanged sba communications corp sbac rose 026 to 35048 and american tower reit amt rose 010 to 28318 trading volume 18 m eclipsed its 50day average volume of 13 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