Weak markets send Manulife Financial to loss

TORONTO Aug 9 (Reuters) - Manulife Financial Corp fell to a loss in the second quarter as weak financial markets forced the company to take a C$677 million ($680.44 million) charge to revalue its long-term investment assumptions.

Manulife, Canada's No. 2 insurer by market capitalization, said it lost C$300 million, or 18 Canadian cents a share, compared with a year-before profit of C$490 million, or 26 Canadian cents a share. ($1 = 0.9950 Canadian dollars) (Reporting by Cameron French; Editing by Dale Hudson)