The US dollar is breaking out of its longest trading range in a year as the Iran war fuels inflation expectations and pushes Treasury yields higher, reviving bets the Federal Reserve may need to raise rates.
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Dollar climbs 1.5% as Iran war stokes inflation, rate-hike bets
The dollar index has climbed 1.5% since the US-Israeli strikes on Iran began Feb. 27, pushing the greenback toward the 101 level that has capped a five-point trading range for roughly a year, as rising bond yields and stubborn inflation force a hawkish repricing of Federal Reserve policy.
"I think there could be a little breakout," said Thierry Wizman, global FX and rates strategist at Macquarie Group. "If oil prices stay high and the Fed signals it's tightening, you could see the dollar strengthen further."
The 10-year Treasury yield has risen about 50 basis points since the conflict began in late February, while the two-year yield — the maturity most sensitive to Fed rate expectations — has climbed nearly 70 basis points. Market-based measures of long-term inflation expectations, known as break-evens, hit a three-year high of 2.508% earlier this month before easing to 2.4%. The dollar index last traded at 99.13.
A sustained dollar breakout would tighten global financial conditions, pressure emerging-market currencies such as the Brazilian real, and reduce the dollar value of returns on overseas investments for US-based funds. The next Federal Open Market Committee meeting is scheduled for June 16-17, and overnight index swaps now reflect a 40% probability of a rate increase — a dramatic shift from the easing expectations that prevailed before the conflict.
The transmission mechanism is straightforward: higher oil prices from the disruption of crude flows through the Strait of Hormuz — which handles about 21% of global seaborne oil trade — have pushed up headline inflation readings and forced investors to demand higher compensation for holding long-dated bonds. That has widened the yield advantage of dollar-denominated assets over those in Europe and Japan.
"Over the last handful of weeks we have tactically increased our dollar weight ever so slightly," said Oliver Shale, investment specialist for the US at Ruffer Investments. "With no end to the crisis in sight and with evidence of inflationary pressure feeding through into the data, it's becoming more and more difficult to look through that initial shock."
Rate Differentials Widen to Favor the Dollar
The US-German 10-year bond yield spread has widened significantly since the start of the war, reflecting both the relative resilience of the US economy to the energy shock and the Federal Reserve's more aggressive inflation-fighting posture. The euro, which carries a lower yield than the dollar, has borne the brunt of the divergence.
"I think as long as the data justify spreads widening in favor of the dollar relative to Europe or Japan, the natural path for the dollar is to keep going up," said Shahab Jalinoos, head of G10 FX research at UBS.
Even investors who hold a long-term bearish view on the dollar have tempered that stance. "Our stance has been on average negative dollar ... but tactically we've been sort of closer to neutral," said Ugo Lancioni, head of global currency at Neuberger Berman.
The Iran Wild Card
The biggest risk to the dollar rally is a diplomatic resolution. The US and Iran have reached an agreement on a 60-day memorandum of understanding to extend the ceasefire and launch nuclear negotiations, Axios reported Thursday, though President Donald Trump still needs to give final approval. A lasting deal would simultaneously reduce safe-haven demand for the greenback and lower inflation expectations by easing oil supply constraints.
"Who knows what happens on the geopolitical front, but the path of least resistance is, in our view, towards a stronger dollar against low-yielding currencies like the yen and the euro," Jalinoos said.
The last time the dollar traded above 101 on a sustained basis was in late 2024, before the Fed began its easing cycle. A decisive break above that level would mark the most significant dollar rally since the early stages of the previous rate-hiking campaign in 2022-2023.
This article is for informational purposes only and does not constitute investment advice.
[1] USD/CAD, USD/JPY and USD/BRL Forecasts – US Dollar Rising Again as Rates Rise[2] Investors expect US dollar to break higher as Fed battles inflation[3] Silver Rate in Chennai Today (as on 28 May, 2026)[4] Why Treasury Yields Are Climbing And What It Means For The Economy[5] Silver: Why the $100 mark is both within reach and dangerous
