The top-line number out of the ETF industry for March looks bad. US ETF assets fell 7% to $13.3 trillion as broad market selling pressured equity valuations during the peak of the Iran conflict. That is the kind of figure that generates alarming headlines. It is also, in isolation, almost entirely misleading.
Beneath the headline decline, the actual flow data tells a very different story about where investor conviction is sitting and how the ETF structure is performing under genuine stress.
Fixed income captured 43% of all monthly ETF inflows in March despite the drawdown, pulling in $50.8 billion as investors sought yield and safety through the vehicle they trusted most. That is not panic. That is sophisticated capital reallocation using ETFs as the instrument of choice, which is exactly what the structure was designed for. Investors did not flee ETFs during the conflict. They rotated within them.
The energy sector ETFs were among the strongest performers of the quarter. The State Street SPDR S&P Oil and Gas Exploration and Production ETF entered Q1 at a forward price-to-earnings ratio of just 11 even before oil surged above $100, meaning the fund was cheap before the war made it profitable. Energy ETFs broadly delivered returns above 35% in Q1 2026. We covered the full rotation out of growth and into energy in our Q1 2026 markets breakdown at The Weekly Investor.
The more structurally important trend playing out across the ETF universe this quarter is the fee war in crypto products. Morgan Stanley launched the MSBT spot Bitcoin ETF last week at a 0.14% expense ratio, undercutting BlackRock's dominant IBIT fund, which charges 0.25%. When a firm with Morgan Stanley's wealth management network enters a market at a lower fee than the category leader, it is not making a tactical product decision. It is making a strategic declaration about where it sees long-term institutional flow.
BlackRock reported Q1 earnings today showing net inflows of $130 billion for the quarter, with its IBIT Bitcoin ETF contributing meaningfully. Its assets under management now stand at $13.89 trillion. The rotation trade that has defined 2026, out of growth and into dividends, energy, and value, has created standout performance in funds that were deeply out of favor for the prior two years. The March headline is a number. The flow data beneath it is the story.
