**Introduction** The Association of Southeast Asian Nations (ASEAN) can strengthen internal cohesion by deepening intra-regional economic integration, improving implementation of regional commitments, and reinforcing collective approaches to trade, investment, technology, and supply-chain resilience. In an environment characterized by higher trade barriers, industrial subsidy competition, and sustained policy uncertainty, cohesion depends on whether ASEAN-wide commitments are credible, implementable, and sufficiently valuable to outweigh bilateral alternatives[1][2]. **Contextual background** External pressures on ASEAN have intensified as major economies have expanded the use of tariffs, subsidies, export controls, and regulatory measures to advance industrial, technological, and security objectives, increasing trade-policy uncertainty and weighing on global trade and investment prospects[1][2]. At the same time, industrial subsidies and state support are increasingly widespread, reshaping market access and production location decisions, while regulatory and digital fragmentation is raising compliance costs and contributing to standards divergence[1][3][4]. Together, these dynamics increase the risk of policy fragmentation within ASEAN, particularly given differences across members in exposure to external markets, investment flows, and technology restrictions[2][5]. **Pathways to stronger ASEAN cohesion** **1.** **Deepening intra-ASEAN market integration** Stronger internal integration reduces exposure to external shocks and limits vulnerability to external leverage. ASEAN is a major trading region, with total goods trade of about US$3.8 trillion in 2024, yet intra-ASEAN trade remains significantly smaller than extra-ASEAN trade, reflecting persistent frictions[5]. Key policy priorities include reducing non-tariff measures through greater transparency and mutual recognition, strengthening trade facilitation and customs interoperability, and advancing services liberalization in logistics, finance, and professional services. Together, these measures increase flexibility in intra-ASEAN sourcing and market access, reducing dependence on any single external partner[2][6]. **2.** **Flexible integration to strengthen implementation** Consensus remains central to ASEAN cooperation, but flexible arrangements such as “ASEAN minus X” are essential for advancing implementation where readiness differs across members. More systematic use of this approach would allow progress in areas such as digital trade, customs modernization, and services liberalization without requiring all members to move at the same pace. Strengthening implementation credibility reinforces ASEAN’s collective position in external economic engagement by grounding regional commitments in operational arrangements rather than political declarations, an increasingly important consideration under elevated policy uncertainty[1][3]. **3.** **Coordinated approaches to external economic engagement** Internal cohesion is reinforced when external economic engagement is channeled through shared regional frameworks rather than fragmented bilateral initiatives. Coordination efforts can focus on aligning approaches to supply-chain resilience initiatives, strengthening transparency and procedural standards in investment policy, and establishing consultation mechanisms on subsidies and state support. This reduces competitive fragmentation among members and limits exposure to subsidy escalation and retaliatory trade dynamics that continue to weigh on global investment conditions[4]. **4.** **Reducing internal capability and development gaps** Differences in fiscal space, export structures, and institutional capacity lead to uneven exposure to external pressures across ASEAN members. Addressing these gaps requires targeted capacity-building in customs administration, standards infrastructure, and digital trade compliance, alongside regional approaches to infrastructure and development financing. Strengthening ASEAN’s monitoring and implementation capacity helps ensure that regional commitments are deliverable and reduces incentives for members to rely on bilateral arrangements under heightened external pressure[1][2]. **Conclusion** ASEAN’s capacity to maintain cohesion under external pressure rests primarily on internal strength. Deepening intra-regional integration, strengthening implementation through flexible arrangements, coordinating external economic engagement, and narrowing capability gaps together enhance the credibility and durability of ASEAN commitments. In an environment of sustained trade-policy uncertainty, subsidy competition, and regulatory fragmentation, these measures are central to preserving ASEAN cohesion and strategic autonomy.
