Iran War Oil Shock Pushes Central Banks From Rate Cuts to Caution

United States: the Fed waits for proof the shock will fade

The Fed’s near-term answer is patience. It held the federal funds range at 3.50%–3.75% in late April, with reporting citing elevated inflation and higher global energy prices as reasons for the pause . Reuters reporting also said Fed officials warned that the Iran conflict could worsen inflation and delay interest-rate cuts, especially if higher fuel costs create broader supply-chain pressure .

That distinction matters. A one-time rise in gasoline prices may lift headline inflation for a few months, but a persistent energy shock can affect core prices through freight, air travel, production costs and expectations. The Dallas Fed highlighted both channels: direct pressure from gasoline and the risk that household inflation expectations amplify the initial price shock .

Eurozone and UK: fewer cuts, more stagflation risk

For the ECB and Bank of England, the issue is not just inflation. It is the uncomfortable mix of higher energy prices and weaker growth. Reporting ahead of late-April decisions said the Fed, ECB and BoE were expected to maintain a rate-hold stance as energy prices surged while slowdown worries also increased .

Markets moved quickly. A Reuters report carried by U.S. radio outlets said money markets had ramped up bets on rate increases by the ECB, Swiss National Bank and Sweden’s Riksbank before year-end, with the Bank of England seen following later . The Economic Times separately cited Robeco’s view that the crude disruption was forcing some central banks to postpone easing while others weighed hikes that had not previously been expected; in one scenario, Robeco said the ECB could raise rates by 25 basis points in June and September if Brent crude held near $80 per barrel .

The UK’s problem is similar but less clearly a near-term hike story. The BoE is being pushed toward caution because an energy shock can raise inflation while simultaneously weakening demand, a classic stagflation risk cited in reporting on global central banks after the war began . In that environment, cutting too early could damage inflation credibility, while tightening too much could worsen a slowdown.

Canada: a hold because risks run in both directions

Canada shows why this is not a simple inflation-only decision. The Bank of Canada held its benchmark rate at 2.25% for a fourth consecutive time in late April, and officials warned that uncertainty around the Iran war and U.S. tariffs could push the policy rate either higher or lower in coming months .

The Bank’s own framing was cautious rather than hawkish. In March, it said the war had added a new layer of uncertainty, that oil prices were moving sharply higher and that this would push inflation up in the short term . But it also noted the broader central-bank dilemma: economic weakness combined with rising inflation leaves policymakers with no easy path .

Scotiabank’s global outlook captured the same conditional stance. Its baseline assumed tensions would ease around mid-year, oil would remain elevated through the third quarter and then gradually decline; it described oil as the key source of uncertainty and said inflation risks were skewed upward . Under that kind of baseline, the Bank of Canada can stay on hold and wait for the shock to pass. If oil stays high, the case for cuts gets much weaker.

South Korea: the clearest hold-or-hike case

South Korea faces the sharpest pressure because the oil shock is paired with currency weakness. The Bank of Korea held its benchmark rate at 2.5% in April, its seventh straight pause, with reporting citing consumer prices above 2% on higher oil costs and the won weakening into the 1,520 range against the U.S. dollar . Korean reporting described the combined rise in oil prices and the won-dollar exchange rate as a twin shock, because a weaker won can make imported energy more expensive and push up consumer prices more broadly .

Inflation data then strengthened the case for caution. South Korean inflation accelerated at the fastest pace in 21 months in April, driven by surging petroleum prices after the U.S.-Iran conflict rippled through transport, travel and household costs . Reuters reporting said petroleum product prices jumped 7.9% month over month and international airfares rose 13.5% .

That is why the BOK is closer than most major peers to an explicit hold-or-hike debate. Deputy Governor Yoo Sang-dae said it was time to consider stopping rate cuts and raising rates, and said a signal that a hike was possible could emerge at the May monetary policy meeting . Economists also warned that if oil stayed around $110 per barrel under a prolonged Strait of Hormuz disruption scenario, the BOK could face rate-hike pressure from the third quarter .

Why an oil shock can stop rate cuts

Central banks can sometimes look past energy spikes when they believe the shock is temporary and unlikely to spread. The problem in 2026 is that the Iran war raises several spillover risks at once:

• Direct inflation: Higher oil and gasoline prices feed quickly into headline inflation, a channel flagged by both the Dallas Fed and Bank of Canada .
• Inflation expectations: The Dallas Fed specifically warned that gasoline increases could raise household inflation expectations, amplifying the direct effect .
• Supply-chain pressure: Fed officials warned that prolonged fuel-cost pressure could create broader supply-chain risks and keep inflation persistent .
• Currency pass-through: In South Korea, oil-price increases are being amplified by won weakness, increasing the local-currency cost of imports .
• Stagflation risk: Higher inflation alongside weaker growth makes policy harder, because cuts could reignite inflation while hikes could deepen a slowdown .

What would bring cuts back?

The path back to rate cuts depends less on central-bank rhetoric than on oil and expectations. If the conflict eases, supply routes stabilize and energy prices retreat, the case for delayed cuts can return. Scotiabank’s baseline, for example, assumed tensions ease around mid-year, oil remains elevated through the third quarter and then gradually falls; it also projected a cautious Fed with one cut this year and one in 2027, followed by a pause around 3.25% .

If the shock persists, the policy map changes. Europe could face more pressure to reverse from easing to hikes, particularly if markets continue pricing higher inflation . Canada could remain stuck in a data-dependent hold, because officials have said the next move could be either up or down depending on how the Iran war, energy prices and tariffs evolve . South Korea would remain the most exposed among the countries covered here, because oil inflation and won weakness are already affecting prices and BOK officials have openly discussed the possibility of hikes .

The bottom line: the rate-cut cycle has not disappeared, but the hurdle for cutting has risen. Until central banks are confident the Iran-war oil shock will stay temporary, the safest policy choice is to pause first and cut later.