shares of canadian natural resources ltd cnq slipped 086 to c7588 wednesday in what proved to be an allaround poor trading session for the canadian market with the sptsx composite index gsptse falling 066 to 1989165 canadian natural resources ltd closed c1230 short of its 52week high c8818 which the company achieved on april 21st trading volume of 63 m shares eclipsed its 50day average volume of 53 m