No hope for rate cuts? Surging oil prices may push global inflation up to 4.5% in Q4.

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Geopolitics is pushing oil prices to new highs, and this energy shock triggered by the Iran war is systematically reshaping global inflation and monetary policy expectations.

According to Bloomberg's Chief Emerging Markets Economist Ziad Daoud, geopolitical supply disruptions have raised oil prices by $49 this year, accounting for about half of the current price.

Bloomberg projects that the oil price surge will drive global inflation to 4.5% in the fourth quarter of 2026, well above 3.1% in the fourth quarter of 2025. Meanwhile, market expectations for the Federal Reserve have shifted from rate cuts to rate hikes—current market pricing shows that not only could the Fed not cut rates, it could potentially hike rates nearly twice.

This shift poses a direct impact on both consumers and investors: the dual pressures of rising living costs and higher borrowing costs are stacking up, and the Trump administration's original policy logic of relying on cheap energy and loose monetary policy has been thoroughly disrupted by this war.

Strait of Hormuz Blockade: Supply Shock Contributes $49 Rise

The United States and Iran have been striking each other for twelve consecutive days.

Tehran is attempting to formalize its control over the Strait of Hormuz, while Washington is working to break this blockade. The outcome of their contest is that this globally critical energy shipping channel is nearly shut down.

According to Bloomberg data, shipping traffic in the Strait of Hormuz briefly rebounded late June but has since plummeted again, causing disruptions to roughly 10% of global oil supply. Meanwhile, as the conflict spreads to the Red Sea, the Houthi forces have begun attacking Saudi oil tankers, threatening another shipping route that carries about 5% of global crude flows.

Both key routes are facing pressures at the same time, placing unprecedented dual bottlenecks on global oil supply. Bloomberg estimates these supply disruptions have combined to contribute $49 to this year's oil price surge.

Weakening Demand Partially Offsets—But Room Is Limited

Weakness on the demand side has to some degree acted as a "shock absorber" for the wartime supply shortage. Bloomberg estimates declining demand has exerted approximately $10 of downward pressure on Brent crude prices in 2026.

Consumers are responding mainly at two levels: first, fuel substitution—shifting to alternative energy; second, overall reduction in energy consumption, with Asia showing particularly significant demand adjustment. In addition, inventory releases are partly filling the supply gap by substituting missing spot supply with reserve oil.

However, natural contraction in demand and inventory buffering ultimately cannot fully offset the structural loss on the supply side. As supply shocks continue to expand, the marginal effect of this buffer mechanism is diminishing.

Inflation Expectations Revalued, Rate-cut Window Closes

This war has had a significant impact on the global economy and fundamentally changed market judgments about the path of monetary policy.

Prior to the outbreak, markets generally expected the Federal Reserve would embark on a rate-cutting cycle. However, as oil prices keep rising, pushing up inflation expectations, market pricing has shifted toward rate hikes—with implied rate increases now approaching two increments. Consumers face dual pressures of higher living costs and rising borrowing rates.

From a policy perspective, Trump’s return to the White House has seen a clear pursuit of cheap energy and low interest rates. At the end of 2025, falling oil prices and expectations for rate cuts were both within reach. Yet the outbreak of the Iran war caused both objectives to be missed—with this war led by Trump failing to deliver any of the hoped-for economic dividends.

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