**Introduction** The 2025 US-Korea economic-security framework reflects a broader reorientation of US trade and investment ties with regional allies toward security-linked economic cooperation. Trade relationships are increasingly structured around supply-chain resilience, strategic investment, and regulatory coordination in sensitive sectors, rather than tariff liberalization alone. **What is the 2025 US-Korea economic-security framework?** By 2025, US-Korea economic relations had evolved beyond the original market-access focus of the US-Korea Free Trade Agreement. Cooperation increasingly centered on managing strategic dependencies, addressing risks from non-market practices, and aligning investment and production decisions in industries viewed as critical to competitiveness and resilience. South Korea’s role as a major investor in US manufacturing and technology has become a defining feature of the bilateral relationship. Economic cooperation has therefore placed greater emphasis on anchoring production capacity and capital within trusted partner networks, reflecting the integration of economic security considerations into trade and investment policy[1]. **How the framework reflects broader shifts in US regional economic ties** **1.** **Economic security has become a core organizing principle of trade cooperation** The US-Korea framework treats trade policy as a tool for managing exposure to supply disruptions, circumvention risks, and strategic vulnerabilities. This approach mirrors wider US engagement with regional allies, where economic ties are expected to support resilience and enforcement objectives alongside traditional market-access commitments[2]. **2.** **Strategic investment now shapes the terms of economic partnership** Investment flows and industrial capacity in strategic sectors play an increasingly central role in bilateral economic relations. Korea’s investment position in advanced manufacturing, energy, and technology aligns with a broader US pattern of prioritizing investment-anchored alignment with allies. These dynamics indicate a shift away from tariff exchanges toward cooperation structured around capital deployment and production location[1]. **3.** **Regulatory coordination extends beyond tariffs into digital and industrial policy areas** The framework reflects growing attention to regulatory compatibility in areas such as digital trade, data governance, and industrial standards. As multilateral rules have struggled to keep pace with these issues, bilateral coordination has become an important mechanism for reducing policy uncertainty and limiting regulatory friction that can impede trade and investment[3]. **4.** **Bilateral frameworks complement multilateral trade rules** The US-Korea arrangement operates alongside World Trade Organization commitments rather than displacing them. Ongoing monitoring of trade measures in 2025 shows continued reliance on unilateral and industrial policy tools across the global economy, reinforcing incentives for allied economies to coordinate through bilateral and plurilateral frameworks where multilateral consensus remains difficult[2]. This layered approach has become more common across US trade relationships in the region. **Conclusion** The 2025 US-Korea economic-security framework illustrates a broader shift in US trade and investment ties with regional allies toward security-oriented economic alignment. Strategic investment, supply-chain resilience, and regulatory coordination increasingly define the structure of economic partnerships. These developments reflect wider changes in the trading system, where bargaining power and cooperation depend less on tariffs and more on industrial capacity, technological depth, and risk management.