Market volatility is expected due to South Korea's new price reform in 2026-2028. South Korea adjusts national health insurance prices for existing listed products every two years. Adjustments are made on the basis of the actual transaction price (ATP) mechanism. The reform is characterized by the expected instability on the market of medicines and medical products. These changes will affect the prices of existing products in the national health insurance. The ATP mechanism is used for regular price updates every two years.