This week’s chart highlights the changing landscape of thematic ETF investing and where investors are directing capital today. While innovation and clean energy themes dominated flows earlier in the decade, recent years have seen a strong shift toward artificial intelligence, defense, infrastructure, space, and nuclear energy. AI has emerged as the clear leader in 2026, reflecting growing investor conviction in its potential to influence economic growth and productivity. The resurgence of defense and nuclear energy themes also suggests increased attention to energy security and geopolitical trends. As investor priorities evolve, thematic flows can provide valuable insight into the trends shaping market sentiment and future investment opportunities.