MFS Investment Management, a unit of Sun Life Financial, might undergo some changes in the future--one of them being a potential sale. The stock price of the Canadian insurance giant might be an indication of what's in store, according to Boston Globe columnist Steven Syre.

Sun Life shares hit their lowest price of the year last month, dragged down by reaction to the company's quarterly financial report and news its president was quitting. Then the stock turned quickly, climbing from $37.35 to nearly $41 in a few weeks, one explanation being that the company was about to make a deal involving MFS, a business it has owned for 24 years.

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