Dec 20 (Reuters) - Shares in Toronto's main stock index opened lower on Thursday, dragged down by shares of energy companies as oil prices hit their lowest levels in more than a year.
* At 9:35 a.m. ET (14:45 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 19.39 points, or 0.14 percent, at 14,244.