Rating Action: Moody's upgrades Nationstar's senior unsecured rating to B1 from B2, assigns a B1 corporate family rating to Mr. Cooper Group Inc.; outlook stableGlobal Credit Research - 18 Feb 2022New York, February 18, 2022 -- Moody's Investors Service ("Moody's") has assigned a B1 corporate family rating (CFR) to Mr. Cooper Group Inc. (Mr. Cooper). Concurrently, Moody's withdrew the B2 CFR and upgraded to B1 from B2 the backed long-term senior unsecured rating of Mr. Cooper's indirect, wholly-owned subsidiary, Nationstar Mortgage Holdings Inc. (Nationstar) and upgraded to B1 from B2 the issuer rating of Mr. Cooper's operating subsidiary, Nationstar Mortgage LLC.