Futures dip on global bond sell-off

(Reuters) - Stock futures pointed to a lower opening for Canada's main stock index on Tuesday as a global bond sell-off and continuing worries on Greece's perilous financial situation weighed on the market. Ten-year U.S. Treasury yields , the benchmark for global borrowing costs, hit their highest since early December. Elevated yields mean higher corporate borrowing costs, which could hit shares across the world. June futures on the S&P TSX index were down 0.57 percent at 7:15 a.m.