The OECD Sustainable Investment Days 2025, held in November 2025, brought together governments, investment promotion agencies, private investors, and civil society actors to review global investment policies and explore how foreign investment can promote sustainable development. The meetings focused on investment-policy reform, digital investment tools, and mechanisms to align foreign direct investment with environmental and social objectives. Participants discussed strategies for financing green infrastructure, enhancing governance of sustainability-focused investment, and improving impact measurement. The event underscored the growing recognition of sustainable investment as a strategic priority for long-term economic resilience, signaling a shift toward integrating sustainability into mainstream investment decision-making. Next steps in the OECD Future of Investment Treaties programme were also discussed.