shares of kansas city southern ksu slid 180 to 29085 tuesday on what proved to be an allaround rough trading session for the stock market with the sp 500 index spx falling 190 to 456700 and dow jones industrial average djia falling 186 to 3448372 kansas city southern closed 2454 short of its 52week high 31539 which the company reached on may 13th the stock demonstrated a mixed performance when compared to some of its competitors tuesday as union pacific corp unp fell 160 to 23564 canadian national railway co cni fell 140 to 12657 and csx corp csx fell 270 to 3466 trading volume 19 m eclipsed its 50day average volume of 679548 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