TORONTO, Jan 21 (Reuters) - Toronto’s main stock market index dived more than 500 points at the open on Monday, following overseas markets lower, as worries persisted over the well-being of the U.S. economy.
Just after the open, the Toronto Stock Exchange’s S&P/TSX composite index .GSPTSE was down 506.70 points, or 4 percent, at 12,230.42. ($1=$1.03 Canadian) (Reporting by Scott Anderson)