shares of algonquin power  utilities corp aqn slid 126 to c1098 thursday in what proved to be an allaround negative trading session for the canadian market with the sptsx composite index gsptse falling 146 to 1981069 algonquin power  utilities corp closed c781 short of its 52week high c1879 which the company achieved on august 15th trading volume of 46 m shares eclipsed its 50day average volume of 26 m