Iran crisis drives Treasury yields to 2026 highs as rate-hike bets rise

The Iran war's energy shock is pushing Treasury yields toward their highest since the conflict began in February, narrowing the odds the Federal Reserve will need to raise rates for the first time in more than two years.

"The bond market is pricing in a higher probability that the Fed will need to act if oil-driven inflation proves persistent," said Olu Sonola, head of U.S. economics at Fitch Ratings. "This is the closest Chairman Warsh has come to acknowledging that rates could go up."

The 10-year Treasury yield has climbed toward levels last seen in the immediate aftermath of the Feb. 22 Iranian escalation, when oil prices surged past $100 a barrel for the first time since 2022. Consumer and wholesale prices dipped in June as oil retreated, but Fed Chair Kevin Warsh signaled caution on those readings, telling Congress that "these are all imperfect measures of the state of underlying inflation." The Fed's benchmark rate stands at 3.5% to 3.75% after the Federal Open Market Committee voted unanimously to hold steady at its June meeting.

The transmission from geopolitics to rates to equities is unambiguous: higher yields compress equity valuations, and a rate hike — which futures traders now see as more than 70% probable by year-end — would mark the first increase since the Fed's tightening cycle ended in 2024. The S&P 500's bull market, which has run on expectations of stable or lower rates, faces its most direct challenge from the Iran-driven energy crisis.

The Strait of Hormuz, through which about 21% of the world's oil passes, remains a flashpoint. WTI crude has traded above $100 a barrel since the February escalation, and while June saw a temporary pullback in energy prices, the underlying supply risk has not dissipated. Warsh told the Senate Banking Committee on July 15 that the Fed would watch whether price increases were affecting "the generalized price level" rather than a single category such as oil — a framework that leaves the door open to tightening if second-round effects emerge.

Rate-Hike Odds Reshape the Forward Curve

Futures markets have repriced dramatically since the Iran war began. The CME Group FedWatch Tool now assigns a 51% probability of a rate hike at the Fed's September meeting and a greater than 70% chance by the December gathering. Just three months ago, before the conflict sent oil prices soaring, traders were pricing in three rate cuts for 2026. The shift has been most visible in the short end of the Treasury curve, where the 2-year yield has risen in tandem with rate-hike expectations.

The Fed's June Monetary Policy Report described the outlook as "subject to considerable uncertainty," citing the Middle East conflict as a key risk. Warsh, who took office in May after a contentious confirmation process, has created five task forces to study Fed reforms — a "regime change" he has championed — but has offered no explicit forward guidance on the timing of any rate move.

Bull Market at a Crossroads

The equity market's reaction has been measured but telling. The S&P 500 has held above its February levels, but the narrowing of rate-hike odds has compressed valuations in rate-sensitive sectors. The last time the 10-year yield traded at current levels — in the days immediately after the Iran escalation — the S&P 500 fell 3.2% over a two-week period before recovering. A repeat of that pattern would put the bull market's durability to the test.

Berkshire Hathaway's Warren Buffett, in a CNBC interview July 15, expressed confidence in Warsh's leadership but acknowledged the difficulty of the moment. "He cares about the country," Buffett said. "It doesn't mean his decisions are always great, because sometimes the decisions are so tough."

The next catalyst is the Fed's July 28-29 FOMC meeting, where the committee is nearly 90% certain to hold rates steady, according to fed funds futures. The September meeting will be the real test: if oil prices remain above $100 and inflation readings fail to moderate, the probability of a hike will only increase, putting further pressure on both bonds and equities.

This article is for informational purposes only and does not constitute investment advice.