Rising oil prices have thrust inflation expectations to multi‑year highs, sharpening Wall Street’s nerves ahead of Tuesday’s consumer‑price index release. Even before the data, investors were already pricing higher future price growth, a rare sore spot in a market that has largely ignored the U.S.–Iran clash and its energy shock. The heightened anxiety centers on how lingering inflation could upset the equity rally.

The gap between nominal Treasury yields and those on Treasury Inflation‑Protected Securities – the break-even rate – jumped to its loftiest level since October 2022. Fed data shows the metric now implies investors foresee annual inflation averaging 2.7% over the next five years, while the 10‑year break‑even nudged to 2.5%, a peak not seen since 2023. Such readings pressure the Federal Reserve’s rate roadmap.

Equities and other risk assets have logged strong gains this year, helped by muted inflation expectations that left room for future rate cuts. The recent surge in forward‑looking inflation could force the Fed to keep rates higher longer, squeezing valuation multiples and testing the resilience of the current market rally. Investors now weigh stronger price pressures against the prospect of tighter monetary policy.