OREANDA-NEWS. A.M. Best has assigned the Long-Term Issue Credit Rating of “bbb+” to the recently announced CAD 1 billion 3.05% Series 2016-2 subordinated unsecured fixed floating rate debentures due 2028 of Sun Life Financial Inc. (SLF) (Toronto, Ontario, Canada). The outlook assigned to this Credit Rating (rating) is stable, which is consistent with the outlook for the existing ratings of SLF.