TORONTO, Oct 6 (Reuters) - The Toronto Stock Exchange's main index tumbled more than 1,100 points and more than 10 percent on Monday morning, its biggest percentage drop since October 1987.
Energy stocks led the retreat as oil prices tumbled on concerns about fallout from the global credit crisis.
The S&P/TSX composite index .GSPTSE was down 1,106.95 points, or 10.25 percent, at 9696.40.
The tumble marked the first time the index has been below 10,000 level since July 2005. (Reporting by Jennifer Kwan; editing by Peter Galloway)