shares of canadian national railway co cnr rallied 257 to c16259 thursday in what proved to be an allaround positive trading session for the canadian market with the sptsx composite index gsptse rising 083 to 1953901 canadian national railway co closed c1280 below its 52week high c17539 which the company reached on december 13th trading volume of 13 m shares eclipsed its 50day average volume of 13 m