In a surprising turn of events, the Trump administration has proposed to maintain the Medicare payment rates for insurers at current levels, sparking a sharp decline in shares of major health insurance companies. The proposed flat rates, which are expected for the upcoming year, have sent stocks such as Humana, UnitedHealth, and CVS Health into a downturn during after-hours trading. Analysts and investors reacted negatively to the news, leading to significant losses in health insurance stocks as market responses reflected concerns over the impact of the proposal on profitability. The Centers for Medicare & Medicaid Services (CMS) is also expected to announce updates regarding risk adjustments and other related policies for Medicare Advantage in the coming days.