BOJ hike caps week of global tightening as central banks battle Iran war inflation

A synchronized wave of monetary tightening swept across the world's largest economies this week as central banks moved in rapid succession to raise interest rates, responding to an energy shock fueled by the ongoing war with Iran that has kept oil prices above $100 a barrel.

The Bank of Japan on Friday raised its policy rate to 1.25% — a 31-year high — just two days after the Federal Reserve hiked rates for the first time in three years, and a week after the European Central Bank lifted its key rate to 2.5%. September has now produced the largest increase in average G10 interest rates since July 2023, with four central banks raising rates and others signaling further tightening ahead.reuters+2

"Our policy phase has changed," BOJ Governor Kazuo Ueda said Friday, signaling the bank was prepared to keep pushing borrowing costs higher.reuters

Energy Shock Reshapes the Outlook

The coordinated moves reflect a shared concern: higher oil and gas costs from the Iran war risk triggering a fresh cost-of-living crisis only a few years after the post-pandemic inflation surge. The collapse of a short-lived U.S.-Iran pact last month, combined with a Houthi advance along the Red Sea coast threatening global oil supplies, has sharply darkened the outlook.tekedia+1

"The expectation now is that energy prices will stay elevated for longer," ECB Vice President Boris Vujčić told Reuters. West Texas Intermediate crude settled at $102.4 per barrel this week, while physical market prices hovered near $120. Brent crude futures dipped late Friday after reports that China asked Tehran to help restrain the Houthis, but broader supply concerns remain.reuters+3

Fed Defies Trump, Markets Price in More Hikes

New Fed Chair Kevin Warsh defied public demands from President Donald Trump for rate cuts, joining colleagues in a unanimous vote to raise rates on Wednesday. Warsh said he would be "hard-pressed to describe broad financial conditions as restrictive," a signal interpreted as laying groundwork for further tightening. Updated Fed projections showed 16 of 18 policymakers expect at least one more quarter-point hike by year-end.bnnbloomberg+1

"The Fed has regained some credibility after raising rates," said Andrew Lake, chief investment officer at Mirabaud Asset Management. The U.S. 10-year Treasury yield crossed 5% this week for the first time since 2007 before easing slightly.reuters+2

The Bank of England held rates steady Thursday but shifted its tone notably, with Governor Andrew Bailey warning that prolonged conflict could force action. Markets are now pricing in nearly four quarter-point hikes from the BoE over the next year.bnnbloomberg+1

A Shallower Cycle, but With Risks

Analysts expect this tightening cycle to be far more muted than the 2022-2023 round, when the Fed alone raised rates by 5.25 percentage points. Even the most hawkish Fed officials now project rates reaching only the 4.25%-4.50% range by the end of 2027. JPMorgan's ↗ 0.10% Greg Fuzesi cautioned that "the peak in rates is uncomfortably dependent on events in the Middle East".reuters

For emerging economies, the implications are immediate. A stronger dollar pressures currencies, raises dollar-denominated debt costs, and increases oil import bills. Kansas City Fed President Jeff Schmid underscored the breadth of the challenge Friday: "Our inflation problem is not just about energy".newindianexpress+2