US central bank signals more rate hikes, boosting dollar’s best weekly performance since June

The Federal Reserve just reminded everyone who sets the tempo in global markets. On September 16, the FOMC voted unanimously to raise the federal funds rate by 25 basis points, pushing the target range to 3.75–4.00%. It was the first rate increase in more than three years, and Chair Kevin Warsh made clear it probably won’t be the last.

The Bloomberg Dollar Spot Index climbed roughly 1.1% in the week through September 18, its strongest weekly showing since June. Futures markets quickly recalibrated, pricing in an approximately 87% probability of yet another quarter-point hike by December.

What the Fed actually did, and why it matters

Warsh described the hike as removing “a dose of accommodation.” The FOMC’s updated dot plot showed most policymakers expect at least one more increase before the year is out. Elevated rates are projected to persist well into 2027.

The dollar’s resurgence and what’s driving it

A stronger dollar is the most immediate market consequence, and it showed up fast. The 1.1% weekly gain on the Bloomberg Dollar Spot Index reflects a straightforward logic: higher US rates make dollar-denominated assets more attractive relative to alternatives in Europe, Japan, and emerging markets.

Analysts at JPMorgan, Standard Chartered, and Brown Brothers Harriman all pointed to the same dynamic. The rate hike, combined with improving US economic growth data, effectively removed several barriers that had been capping dollar appreciation.

The European Central Bank and Bank of Japan have been operating under very different inflation and growth conditions, leaving their policy rates well below the Fed’s new range. That gap is now expected to widen further if December brings another hike.

Broader market implications

Fixed-income markets are adjusting in real time. Treasury yields moved higher across the curve following the decision, and the prospect of further hikes means bond prices could face continued pressure.

Emerging-market economies are particularly vulnerable to this combination of dollar strength and rising US rates. Countries with dollar-denominated debt face a double hit: their obligations become more expensive to service in local currency terms just as external financing conditions tighten.

The 87% probability the market is assigning to a December hike suggests traders believe Warsh meant what he said. Warsh’s first major policy move as chair drew a unanimous vote, projecting internal consensus at a moment when markets were looking for signals about the committee’s direction.

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