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BRIEF-Moody's affirms UnitedHealth's ratings (sr. debt at A3); outlook to negative

Oct 10 (Reuters) - Moody's Investors Service has affirmedUnitedHealth Group Incorporated's (NYSE: UNH) senior debt ratingat A3 and the insurance financial strength (IFS) rating ofUnitedHealthcare Insurance Company (UHIC) at A1, but changedtheir rating outlook to negative from stable followingUnitedHealth Group's announcement that it has agreed to acquire90% of the outstanding shares of Amil Participacoes S.A. (Amil)in Brazil. RATINGS RATIONALE

Keywords: MARKETS RATINGS UNITEDHEALTH