* TSX down 125.91 points at 11,526.78
* Manulife shares headline selloff
By Irene Kuan
TORONTO, Nov 19 (Reuters) - Toronto's main stock index dropped more than 1 percent on Thursday, dragged down by Manulife Financial (MFC.TO) as investors reacted to a major stock offering by the insurer.
Shares of Manulife Financial were down 7 percent at C$18.74, while fellow insurer Sun Life Financial (SLF.TO) dropped 4.5 percent to C$27.40.
After the markets closed on Wednesday Manulife, Canada's top life insurer, said it planned to issue C$2.5 billion ($2.3 billion) in equity. [ID:nN18483228]
"We've had such a strong market in a short period of time and often times, you just need a little trigger to get people to sell," said Ian Nakamoto, director of research at MacDougall, MacDougall & MacTier.
The TSX has rallied 54 percent since falling to a five year low in March.
At 10:15 a.m. (1515 GMT), the S&P/TSX composite index .GSPTSE was down 125.91 points, or 1.08 percent, at 11,526.78.
($1=$1.07 Canadian) (Reporting by Irene Kuan; Editing by Jeffrey Hodgson)