Forex Factory: Weak yen and higher oil drag central banks into a tougher phase

Forex Factory: A weak yen, rising oil and steady Fed, ECB and BOE policy have pushed Japan back into focus as markets weigh intervention risk and sticky inflation.

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Katayama and Bullock are the ones to watch

The Japanese yen has moved back into the spotlight as central banks enter a more difficult phase, with the , the and the all holding interest rates steady while inflation risks have re-emerged.

Traders and policymakers are reassessing the outlook after a pickup in U.S. inflation in March — headline CPI jumped to 3.3% and core CPI rose to 2.6% — and after the U.S.-Iran war pushed oil prices higher, a development that can feed through to transport and food costs and slow the pace of planned rate cuts.

The immediate weight of the moment is clear: the Fed kept rates unchanged and left a divided signal on easing, with three officials expressing doubt about an easing bias and one official favoring a cut, while the central bank’s FedWatch tool now shows no rate cuts penciled in for 2026 and rising odds of rate hikes beginning in Q1 2027.

At the same time, the ECB and the BOE also paused. Both institutions held policy steady, and the ECB explicitly warned it could resume hikes as early as June if imported energy prices continue to climb — a nod to the direct inflation impact from higher oil that would be passed into costs.

The policy mix is what puts the yen under renewed pressure. faces a clear import-cost problem: the currency is weak and that weakness is already lifting the domestic price bill for fuel and goods. The , which abandoned negative rates and began raising rates in March 2024 and raised further later when yen weakness pushed up import costs, may now be forced to do more to counter imported inflation or stem currency depreciation.

That setup makes USDJPY, EURJPY and GBPJPY particularly tricky to price. Rate differentials that favored foreign currencies, the specter of central-bank intervention in FX markets, and the persistent risk of energy-driven inflation all come together to complicate positions across those crosses.

Why this matters today is tied to sequencing: the ECB started cutting rates in June 2024 as eurozone inflation slowed toward its 2% target, the Bank of England began reducing policy in August 2024 after a sharp UK inflation decline, and the U.S. Federal Reserve initiated easing with a 50 basis point cut in September 2024. Those moves suggested a gentle normalization away from the tightening phase. The recent rebound in U.S. inflation and the spike in oil have upended that neat calendar, pausing cuts and even reintroducing the possibility of hikes by early 2027 as signaled by market pricing.

The friction is stark. Japan is already on a different path: the BOJ has been lifting rates since March 2024 in response to stronger wages, steadier inflation and a weaker yen that has driven up import costs. Yet higher global rates elsewhere and energy-linked inflation complicate Tokyo’s choices — more tightening would widen rate gaps and could further pressure currency markets; doing nothing risks imported inflation and mounting domestic price pressure.

Markets will be watching a tight set of indicators and policy signals: oil prices, the next U.S. inflation prints, and any explicit comments from the ECB about June rate action. They will also watch for any sign the BOJ moves again to defend the yen or to accelerate its tightening, which would reshuffle rate differentials and the outlook for yen crosses.

The single, sharpened question now is whether the Bank of Japan will act to blunt the inflation hit from a weak yen and higher energy costs — and if it does, how much that action will unsettle already fragile expectations for rate cuts in 2026 and for the pacing of policy in 2027.

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