ST. PAUL, Minn.--(BUSINESS WIRE)--Fitch Ratings has upgraded Securian’s financial strength rating from AA- to AA with a stable outlook. The rating and outlook apply to Securian Financial Group subsidiaries Minnesota Life and Securian Life. In a news release, Fitch said the upgraded rating and stable outlook reflect Securian’s “strong balance sheet fundamentals, conservative risk profile and improved earnings.” Securian’s “competitive position in the group life insurance market along with the co