OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has affirmed Financial Strength Rating of A- (Excellent) and Long-Term Issuer Credit Rating of “a-” of NiSource Insurance Corporation, Inc. (NICI) (Salt Lake City, Utah). The outlook for these Credit Ratings (ratings) is stable. The ratings reflect NICI’s balance sheet strength, which A.M. Best categorizes as very strong, as well as its strong operating performance, limited business profile and appropriate enterprise risk management. Additionally, the r