Tuesday's sell-off in UnitedHealth Group's stock was arguably overdone.UnitedHealth Group (UNH +3.99%) announced its 2025 full-year and fourth-quarter results on Tuesday, Jan. 27, 2026. Despite reporting better-than-expected earnings, UnitedHealth's stock plummeted 20%.With this latest decline, UnitedHealth Group's share price is now down more than 50% from its late 2024 peak. Should you buy the healthcare stock after its steep sell-off? NYSE : UNHUnitedHealth GroupToday's Change( 3.99 %) $ 11.28Current Pri ...