shares of canadian tire corp ltd cl a ctca dropped 120 to c17563 tuesday in what proved to be an allaround rough trading session for the canadian market with the sptsx composite index gsptse falling 101 to 2040756 canadian tire corp ltd cl a closed c1026 short of its 52week high c18589 which the company achieved on april 25th trading volume of 192756 shares remained below its 50day average volume of 259558