shares of suncor energy inc su dropped 260 to c3112 tuesday in what proved to be an allaround rough trading session for the canadian market with the sptsx composite index gsptse falling 231 to 2065999 suncor energy inc closed c323 short of its 52week high c3435 which the company reached on november 25th trading volume of 276 m shares eclipsed its 50day average volume of 88 m editors note this story was autogenerated by automated insights an automation technology provider using data from dow jones and factset see our market data terms of use