shares of crown castle international corp cci slipped 395 to 17538 monday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 320 to 399124 and dow jones industrial average djia falling 199 to 3224570 crown castle international corp closed 3449 short of its 52week high 20987 which the company achieved on december 31st the stock demonstrated a mixed performance when compared to some of its competitors monday as america movil sab de cv series a amxa fell 367 to 1994 sba communications corp sbac fell 555 to 32310 and american tower reit amt fell 532 to 23109 trading volume 19 m eclipsed its 50day average volume of 17 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