shares of canadian national railway co cnr slid 030 to c16412 friday in what proved to be an allaround poor trading session for the canadian market with the sptsx composite index gsptse falling 000 to 2073901 the stocks fall snapped a threeday winning streak canadian national railway co closed c454 short of its 52week high c16866 which the company reached on october 25th trading volume of 23 m shares eclipsed its 50day average volume of 10 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