TORONTO, Aug 4 (Reuters) - Toronto's main stock index dropped more than 2 percent on Thursday morning with heavyweight resource groups tumbling on mounting concerns about the global economy.
More than wiping out a a late-day rally a day earlier, the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE slid 273.63 points, or 2.14 percent, to 12,542.40.
All 10 main index groups were lower, with nine sectors off more than 1 percent, including healthcare, which dropped more than 6 percent. The heavily weighted resource sectors, energy and materials, were both down more than 2 percent.
$1=$0.98 Canadian Reporting by Ka Yan Ng; editing by Peter Galloway