shares of canadian natural resources ltd cnq shed 153 to c8056 tuesday in what proved to be an allaround negative trading session for the canadian market with the sptsx composite index gsptse falling 115 to 2043987 canadian natural resources ltd closed c736 short of its 52week high c8792 which the company achieved on may 31st trading volume of 26 m shares remained below its 50day average volume of 73 m