A hotter-than-expected inflation read lit a fire under the dollar. The Bloomberg Dollar Spot Index climbed 0.5% on Wednesday, taking out its November top to reach a level last seen in May 2025. Treasury prices fell and yields rose across the curve after the report.
Prices at the consumer level accelerated in September, with the headline index up 0.6% from August and 3.7% from a year earlier, above the 3.6% projection. Stripping out food and energy, the monthly increase was 0.3%, more than economists anticipated. Higher fuel costs helped push the overall figure up. The dollar advanced against every other currency in the Group of 10, and the British pound lagged most peers - dropping to its weakest in almost a year.
The greenback has now strung together five straight winning weeks, rising nearly 3.5% over that stretch, its longest streak since early 2025. A key driver: traders' expectations for more tightening after the Fed lifted rates last month, its first hike in three years. Futures markets are leaning toward almost two additional hikes by the end of January and increasing the probability of action in October.
Speculative accounts stepped up bullish wagers on the currency in the week ending Oct. 6, bringing total long positions tied to a stronger dollar to more than $35 billion, according to the Commodity Futures Trading Commission. With the interest-rate gap favoring the US, several Wall Street shops are rethinking their dollar calls.
"Hotter than expected CPI has given a boost to the dollar this morning as traders price in further tightening from the Fed," said Andrew Hazlett, foreign-exchange trader at Monex Inc.
"Pricing for the October Fed meeting has swung quickly back," said Alex Cohen, a strategist with Bank of America. The firm said it is maintaining its view that the Fed will lift rates this month.
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Citigroup Inc. economists, reacting to the data, added a December increase to their outlook while still expecting no change at the October meeting, which is roughly two weeks away.
HSBC's Nick Andrews and Paul Mackel wrote that Kevin Warsh restored credibility by delivering a rate increase in September. "With prices still running hot, that credibility, and the prospect of firmer policy, should keep the balance of risks tilted towards a stronger dollar," they said.
Traders are looking for Fed Chairman Kevin Warsh to address the inflation figures and the policy path when he appears later this week at the IMF and World Bank annual meetings in Bangkok, Thailand. "It is likely that Warsh reiterates that the Fed has 'no tolerance' for persistently elevated inflation," said Sarah Ying, who leads FX strategy at CIBC Capital Markets. "If he acknowledges broadening price pressures and reiterates the Fed's long-term mandate, it could be interpreted as hawkish by the market."
The euro slid up to 0.8% intraday to $1.1113, the weakest since May last year. It "could continue to bear the brunt of the dollar rally" as Europe's fiscal picture gets cloudier, said Valentin Marinov, Credit Agricole's head of G-10 FX strategy and research. The yen eased up to 0.4%, trading at 158.95 per dollar on Wednesday, inching toward the closely watched 160 mark where many in the market see a higher risk of Japanese intervention.
Support for the dollar has also come from elevated oil prices amid the ongoing war in Iran and mounting anxiety about France's fiscal and political vulnerabilities, both of which have boosted demand for havens. The conflict has helped push global yields higher. While other major central banks are preparing to tighten to tame inflation, not every economy can absorb the same dose of rate increases as the US.
A sturdier dollar and firmer inflation have nudged markets toward expecting more Fed action, lifting yields and pressuring major peers like the euro, pound and yen. If you have international holdings or overseas travel plans, currency swings can quietly reshape returns and costs. The next catalyst lands later this week when Kevin Warsh speaks in Bangkok, and that tone could either keep the dollar's tailwind blowing or take a little air out of it.
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