June 18 (Reuters) - Canada's main stock index opened flat on Tuesday as a drop in technology shares countered gains in the energy sector, while investors parsed through U.S. retail sales data and Federal Reserve officials' commentary.

At 9:34 a.m. ET (1334 GMT), the Toronto Stock Exchange's S&P/TSX composite index was down 2.77 points, or 0.01%, at 21,585.11. (Reporting by Nikhil Sharma in Bengaluru; Editing by Shreya Biswas)