shares of magna international inc mg slid 033 to c7503 wednesday in what proved to be an allaround poor trading session for the canadian market with the sptsx composite index gsptse falling 050 to 2010389 magna international inc closed c1671 below its 52week high c9174 which the company achieved on february 2nd trading volume of 583737 shares remained below its 50day average volume of 960807