shares of cameco corp cco shed 100 to c4163 wednesday in what proved to be an otherwise allaround favorable trading session for the canadian market with the sptsx composite index gsptse rising 012 to 2001509 cameco corp closed c231 below its 52week high c4394 which the company achieved on june 13th trading volume of 988601 shares remained below its 50day average volume of 10 m