shares of canadian national railway co cnr slid 114 to c16286 monday in what proved to be an allaround down trading session for the canadian market with the sptsx composite index gsptse falling 068 to 1997492 canadian national railway co closed c862 below its 52week high c17148 which the company reached on march 29th trading volume of 638216 shares remained below its 50day average volume of 11 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