U.S.-listed inflation-linked bond ETFs have seen net inflows in 12 of the last 13 months. Collectively, these ETFs have attracted $12 billion over that period, with $1.3 billion this month alone.

Over that same stretch, investors have pulled a combined $5 billion from riskier assets such as bank loans, emerging‑market debt, and high-yield bonds — a divergence that underscores a broad move into defensive bond exposures as price swings pick up across markets.

The shift comes as geopolitical instability, including the conflict in Iran and the blockade of the Strait of Hormuz, drives oil prices sharply higher and intensifies inflation concerns. Brent crude reached a high of $116 this week amid shipping disruptions in the region.

Matt Bartolini, global head of research strategists at State Street Investment Management, said the surge in commodity prices has translated into more defensive positioning among ETF investors. “The shock in the commodity complex has fueled cross‑asset volatility and increased uncertainty around the inflation outlook,” he said.

Inflation remains above the Federal Reserve’s 2 percent target; as of February, U.S. inflation stands at 2.4 percent. The OECD said this week that the war in Iran could push U.S. and G20 headline inflation above 4 percent — a full percentage point above its previous forecast. 

Bartolini noted that these pressures are pushing investors toward explicit inflation hedges as well as exposures that behave like near‑cash instruments. He added that strong inflows into energy, materials, and commodities ETFs are a natural corollary of the inflation shock. “But you can also see moves into investments that are very similar to cash,” he said.

Bartolini characterized the broader shift as tactical rather than structural, reflecting a desire to restore balance after years in which investor positioning was heavily tilted toward equities. He also suggested that the repositioning could unwind quickly if geopolitical tensions ease. If the conflict in Iran were to de‑escalate — which President Trump has said is his preferred outcome — risk appetite could return. “The near future often looks very different from the recent past,” he said.