The artificial intelligence investment story is evolving, and ETF investors' transaction patterns in the first half of 2026 showed that the market is now looking beyond software giants and chip designers toward the physical infrastructure that powers AI.
Fresh first-half ETF flow data sourced by VettaFi show investors are shifting capital into themes such as memory chips, power infrastructure, cooling systems or HVAC, electrification, and data centers, signaling that the market is broadening from simply betting on AI adoption to investing in the ecosystem required to support it.
The trend comes despite macroeconomic headwinds, including sticky inflation, geopolitical uncertainty, and a shifting Federal Reserve policy stance, underscoring investors' conviction that AI infrastructure remains a long-term secular growth story.
The clearest example of this rotation has been the explosive rise of the Roundhill Memory ETF (BATS:DRAM).
Launched earlier this year, the fund attracted $17 billion in second-quarter inflows alone, swelling to nearly $25 billion in assets and becoming the fastest-growing ETF ever.
