Why Rate Hikes Can’t Fix Inflation Driven by Oil Chokepoints

Most investors assume an inflation spike has a standard cure: the central bank raises rates until prices cool. That assumption meets a hard number when oil chokepoints drive inflation. Oil flows through the Strait of Hormuz fell roughly 26% between Q4 2025 and Q2 2026, and no interest rate decision can reopen a shipping lane.

The US Federal Reserve still raised its federal funds target range by 25 basis points to 3.75%-4.00%. On-highway diesel reached $6.29 a gallon on 14 September 2026, according to the US Energy Information Administration (EIA).

The distinction matters for your portfolio. If this inflation is driven by supply rather than demand, tightening may slow growth without lowering fuel costs, and energy demand assumptions built on “the Fed will fix it” could fail.

A second claim sits alongside the first. Commentator Jay Martin argues the US is positioned to gain from the disruption, possibly by design.

Here is a working framework for separating a first-round supply shock from second-round persistence, and for testing that energy-dominance thesis against the evidence.

Why rate hikes struggle against supply-driven oil inflation

The sceptic’s case is strong. The Fed’s Taylor rule, a formula that sets rates by comparing inflation and growth against targets, assumes cheap credit fuels excess spending. It has no variable for a blocked strait.

Iran’s parliament speaker Mohammad Bagher Ghalibaf made the point mockingly, publishing a “Straits Taylor rule” that adds Hormuz and Bab el-Mandeb as inputs. Martin argues the Fed is using a tool unsuited to the problem.

First-round effects

On the initial price jump, the sceptics are largely right. A hike cannot replace lost barrels. A European Parliament study found that uniform rate increases after an energy shock can suppress demand and investment without adding any supply.

Demand restraint through tightening is also weak relative to price itself. J.P. Morgan Commodities Research estimated prevailing prices would cut global demand by only about 1 million b/d, and that something near $150/bbl might be needed for major demand destruction.

Second-round effects

The picture changes once fuel costs start feeding wages and expectations.

Containing persistence South African Reserve Bank Governor Lesetja Kganyago, speaking at the BIS, reportedly argued that the aim is to stop temporary energy inflation becoming embedded in wages, expectations and broader prices.

Chatham House made a similar case on 12 May 2026. The history supports it: the 1970s shocks became persistent through wage-price spirals, while the 2022 diesel spike passed into freight and food quickly but did not lock in the same way.

Ruffer noted on 28 September 2026 that inflation plus weaker growth makes cuts less likely. One caution: the 3.4% inflation figure Martin cited is the Fed’s preferred PCE measure, not CPI, and September CPI is due on 14 October.

So “rate hikes do not work” is too blunt. Judge a hike by whether expectations are drifting, not by whether oil falls.

How a chokepoint shock travels from tanker to diesel pump

If hikes act on persistence, the first-round shock follows its own physical route. Each step is visible in data.

1. Crude scarcity: fewer tankers move, buyers bid for alternative barrels and the risk premium rises.
2. Refinery costs: refiners pay more for replacement crude and compete for fewer cargoes.
3. Freight and insurance: rerouting around Africa adds distance, fuel, vessel demand and premiums.
4. Distillate squeeze: Asian and European buyers who lost Middle Eastern diesel bid for Atlantic Basin and US cargoes, tightening the US market.
5. Transport cascade: diesel powers trucking, rail, farming, construction and mining; Martin puts diesel’s share of US commercial shipping at about 73%.
6. Goods pass-through: firms absorb some costs, then raise wholesale and retail prices.
7. Wages and expectations: persistent fuel costs feed wage claims, the stage where policy has bite.

The flow data shows the scale feeding step one.

Bab el-Mandeb carried about 5.6 million b/d in the relevant period. Attacks continue: one count records at least 12 strikes on tankers around Hormuz between 28 September and 5 October, while the IMO recorded nine.

Step four is where the shock reaches US consumers. EIA data puts on-highway diesel $2.488 above a year earlier.

Relief may lag any reopening. HSBC estimated normalisation could take two to three months, and Deutsche Bank expects the risk premium to stay embedded while Gulf flows are impaired. For you, diesel and freight are better live gauges of chokepoint inflation than Brent.

Infrastructure bottlenecks further down the supply chain can keep prices elevated even after crude flows recover, which is one reason relief may lag any reopening of the strait.

Inflation basics: what separates supply-driven from demand-driven price rises

That chain points to a definition worth settling. Demand-pull inflation happens when spending outruns what the economy can produce. Cost-push inflation happens when production gets more expensive, as when diesel costs rise.

Rate hikes target demand-pull inflation by making borrowing dearer. They do little directly against cost-push shocks.

The relationship between money supply and inflation explains why rate hikes work on spending-driven price rises but struggle when the pressure comes from production costs rather than excess demand.

Diesel shows why the line blurs. It feeds trucking, rail, agriculture and mining, so a fuel shock spreads through freight and food, as it did in 2022. The 2022-24 Red Sea attacks raised costs the same way, through longer routes and higher insurance.

Shock versus persistence A first-round effect is the direct price jump. A second-round effect is when that jump spreads into wages and expectations and keeps inflation high after the shock fades.

J.P. Morgan estimated the current conflict could add roughly 0.5 percentage points to US year-end inflation, while Allianz Research expects global oil demand to contract by 2.5 million b/d in 2026. To classify any inflation print yourself, run three checks:

• Source: is the price rise coming from spending or from a supply cost such as fuel?
• Wages: are pay settlements accelerating to catch up with prices?
• Expectations: are households and businesses pricing in higher inflation ahead?

If only the first check flags supply, tightening is a weak answer. Not every inflation spike means a selloff in rate-sensitive sectors.

Is US energy dominance a strategy or a by-product?

Martin goes further than monetary policy. He speculates that US involvement in conflicts may be a bid for a dominant share of world energy supply, while conceding he does not know the motive and that it may not succeed.

What the export data shows

The export shift is real. EIA data shows US LNG exports at 17.4 Bcf/d in H1 2026, up 23% year on year, with shipments to Asia up 108%.

Crude exports reportedly hit a record 5.6 million b/d in May, and Asia’s share of US crude shipments rose from 28% to 47% between February and May. Diesel exports rose 23% and gasoline 27% in January to April.

Martin cites a European pledge of about $730 billion of US energy purchases; the European Commission puts expected offtake at $750 billion through 2028.

Investors exploring the export side of the thesis will find our full explainer on US LNG export growth useful for its detail on volume trends and what is driving record shipments.

Venezuela’s unresolved access

Venezuela holds about 303.8 billion barrels of reserves, per OPEC. North American Blue Energy Partners reportedly holds a 100-year lease on 17 fields, and Chevron plans to lift output toward 600,000 b/d within five years. Interior Secretary Doug Burgum reportedly said the deal moves the energy centre of gravity to the Western Hemisphere.

Reuters flagged possible constitutional challenges. Implementation remains unresolved.

Where the thesis breaks down

The documented facts show US firms and exports benefited, not that conflict was started for that purpose. Treat export strength as an investable trend, and “control of supply” as unproven.

A framework for energy investors facing supply shocks

Put the pieces together and a single price view looks thin. The shock is both inflationary and growth-negative, so policy risk and demand risk partly offset each other.

Historical episodes of energy-driven stagflation show why a shock that is both inflationary and growth-negative leaves policymakers with few clean options, a risk that sits at the tail of the current scenario range.

A crack spread is the gap between the price of crude and the refined products made from it. When diesel tightens faster than crude, that spread widens, which can favour refiners and product exporters over pure crude producers.

The key decision is which bet you are making. Exposure to US exporters and infrastructure is a different position from exposure to oil price direction, and the two can move apart.

This is analysis, not personal financial advice. Past performance does not guarantee future results, and forward-looking estimates cited here are speculative and subject to change.

What the evidence settles, and what it leaves open

The claim that hikes cannot fix supply-driven oil inflation largely holds. Tightening cannot reopen Hormuz or replace barrels, though it can restrain second-round effects in wages and expectations.

The energy-dominance thesis holds only in its narrow form. Chokepoint disruption has raised the strategic value of US crude, LNG and Venezuelan access. The orchestration version remains opinion, not documented fact.

Three variables will decide which scenario you are in:

• Hormuz flow recovery and the lag before insurance and trade normalise
• Diesel and distillate prices as the live inflation gauge
• Venezuelan implementation, including legal outcomes

September CPI lands tomorrow. Read it through the three checks: source, wages and expectations.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions.