Canadian life insurer Sun Life Financial Inc. (SLF) said Monday it has agreed to sell its U.S. annuity business and certain life-insurance businesses to Delaware Life Holdings for $1.35 billion, a move aimed at lowering its risk profile and earnings volatility.

Analysts have said a sale of the Toronto-based insurer's unit would be positive at is would de-risk the company's equity-market exposure and limit its interest-rate exposure.

Sun Life said Monday the sale will result in a reduction in book value of 950 million Canadian dollars ($963 million) at closing and is expected to reduce earnings by about 22 Canadian cents a share in 2013.

As a result of the sale, Sun Life said its earnings sensitivities to equity markets would be reduced by 50% and earnings sensitivities to interest rates would be reduced by 35%.

Closing is expected by the end of the second quarter, subject to approvals and closing conditions.

Sun Life is Canada's third-largest life insurer, behind Manulife Financial Corp. (MFC) and Great-West Lifeco Inc. (GWO.T).

Write to Judy McKinnon at judy.mckinnon@dowjones.com

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