A plain-English guide to how oil shocks transmit to inflation and rates.

Brent surged 9.2 percent Monday on renewed US-Iran conflict over the Strait of Hormuz. The paired analysis today, US strikes Iran again, reads the tape as pricing an inflationary supply shock: dollar firmed, rates rose, gold broke $4,000 on the real-yield channel. Whether that read is correct depends on how oil moves actually transmit to inflation and rates, which lags each channel carries, and what markets typically price ahead of the data confirmation. This piece is the framework.

The four transmission channels

An oil price move affects consumer prices, corporate costs, and inflation expectations through four distinct channels, each with its own lag and its own visibility in the market tape.

Channel one: direct headline inflation (2 to 4 weeks)

Retail gasoline prices track wholesale gasoline prices with a lag of roughly 2 to 4 weeks. Wholesale gasoline prices track Brent (or WTI, for US-specific pricing) with a lag of days. So a Brent move of the magnitude Monday's print delivered will show up in retail gasoline prices within a month.

Retail gasoline enters the CPI basket directly through the "motor fuel" subcomponent, which accounts for roughly 3.4 percent of headline CPI. A $10 sustained Brent move produces approximately a 25-cent gasoline price move at the pump, which produces approximately a 0.15 percentage point move in month-over-month headline CPI, which annualises to approximately 1.8 percentage points on the headline year-on-year reading.

The math is: a $10 Brent move is roughly 12 percent on the current front-month; the passthrough to gasoline is roughly 60 percent (some captured by refiner margins); that produces a 7 percent gasoline price move; multiplied by the CPI weight of 3.4 percent produces 0.24 percentage points on the CPI basket in the pass-through month.

When it shows up in data: The July CPI print releases August 12. Today's Brent move will therefore be partially in the July print (for the last week of the month) and fully in the August print (September release).

Channel two: core goods inflation (6 to 12 weeks)

Core CPI excludes food and energy but includes goods whose production requires energy inputs. Transport of goods, plastic production, chemical manufacturing, and agricultural inputs all move with oil prices at a lag.

The core-goods CPI subcomponent has a historical correlation with lagged Brent of roughly 0.4 at the 8-week horizon, dropping to 0.2 at the 20-week horizon. A sustained $10 Brent move produces approximately 0.10 percentage points of core-goods CPI passthrough over the following 8 weeks.

When it shows up in data: Fully priced by approximately the September or October CPI prints.

Channel three: core services inflation (indirect, 3 to 6 months)

Services inflation is dominated by wages and shelter, both of which are only weakly connected to oil prices. But transportation services (airfare, taxi/ride-share fares, trucking) do respond to oil prices with a lag of 3 to 6 months as service providers adjust their pricing to reflect operational costs.

The core-services passthrough is materially smaller than the core-goods passthrough. A sustained $10 Brent move produces approximately 0.03 percentage points of core-services CPI passthrough at the 4-month horizon, dropping to background noise by 6 months.

When it shows up in data: Diffusely across November-December CPI prints and into Q1 2027.

Channel four: inflation expectations (immediate)

Financial-market-based inflation expectations (TIPS-derived breakevens, inflation swaps) reprice in real time based on oil moves. The desk uses the 10-year breakeven as the primary market-implied inflation expectation measure; the 5-year is more sensitive to near-term prints.

Empirical relationship: a $10 sustained Brent move typically produces a 3 to 5 basis point move in the 5-year breakeven and 1 to 3 basis points in the 10-year breakeven. Longer breakevens are more anchored because markets price the through-cycle inflation trajectory rather than the immediate print.

When it shows up in market pricing: Immediately, within minutes of the oil move. Today's Brent surge should produce a visible move in 5Y and 10Y breakevens; the specific magnitude will confirm whether the market is treating the oil move as sustained (larger breakeven move) or temporary (smaller move).

How markets price the transmission before the data

The four channels arrive at data over horizons ranging from 4 weeks to 6 months. Markets do not wait for the data; they price the expected transmission immediately. Three specific price effects show up on any oil-shock day:

Nominal yields rise. The 10-year nominal yield rises by the sum of the expected real-yield change and the expected inflation-expectations change. On today's +9 percent Brent move, the +5 basis point 10-year rise reflects both channels; the real-yield component tells us the market expects the Fed to hold higher for longer to offset the inflation impulse, and the breakeven component tells us the market expects some passthrough to actual inflation.

Real yields rise. The real-yield rise on an oil shock reflects the market's expectation that the Fed will respond to the inflation impulse by holding or tightening policy. If the market believes the Fed will "look through" the shock (treat it as one-off), real yields move less. If the market believes the Fed will respond, real yields move more.

Currency reflects both. The dollar typically firms on an oil-shock day for two reasons: the rate differential (US rates rising against G7 rates) and the safe-haven bid (dollar strength in a supply-shock regime). On today's tape both are present. EUR/USD softened by more than the DXY move; JPY held its own against the yield rise.

The Fed's response function

The Fed's stated response to oil shocks is to distinguish supply-driven from demand-driven inflation. Supply-driven inflation (like a Hormuz-shock) should not, in the standard framework, trigger a policy response because the Fed cannot address supply-side factors. In practice, the Fed responds to whichever inflation is showing up in the data, regardless of source.

The current committee's stated preference (from the June minutes) puts inflation risks "tilted to the upside" with AI infrastructure and tariffs named as supply-side factors. Adding an oil-supply-shock to that list amplifies the hawkish case, even if the standard framework would suggest the Fed should look through.

Chair Warsh's "prices are too high" framing is the most absolute language a chair has used in this cycle. That absolutism reads as inclusive of supply-driven inflation, not just demand-driven. The market's read of the current committee is therefore that a supply shock will be treated as inflation the Fed responds to, not inflation the Fed looks through.

Historical calibration: what happened in prior shocks

Three specific historical episodes provide calibration for reading the current shock.

2022 Russia-Ukraine (February 24, 2022). Brent gapped from $95 to $130 over five sessions. Headline CPI passthrough was faster and larger than the standard model predicted (roughly 60 percent of the shock in the following month) because the shock coincided with existing supply-chain disruption. Fed response was a 50bp hike in May, matching the market's pricing during the shock.

2019 Aramco attack (September 14, 2019). Brent gapped 15 percent on the strike; the surge unwound within two weeks as Saudi production came back online. Fed did not respond; the shock proved to be one-off. Rate markets initially priced hawkish then unwound the pricing.

2020 Saudi-Russia price war (March 2020). Brent crashed from $50 to $20 in three weeks. Deflationary supply shock (opposite direction). Fed responded with emergency easing, in part because the shock coincided with the pandemic demand collapse.

Today's shock most closely resembles the 2019 Aramco pattern in terms of driver (specific geopolitical event against a producer), but with a materially higher probability of sustained escalation given the four US strikes-in-a-week pattern. The base rate on the shock unwinding within two weeks is roughly 40 percent (lower than 2019's ~70 percent).

Reading a shock in real time

Three specific reads matter in the days following a shock:

Read one: the breakeven move. A shock that the market believes is sustained produces a materially larger breakeven move than a shock the market believes is temporary. Compare the actual breakeven move to the typical $10-Brent-per-3-5bp-breakeven relationship. If the breakevens move less than expected, the market is treating the shock as temporary and one-off. If they move more, the market is pricing sustained transmission.

Read two: the front-back oil spread. If the shock is priced as temporary, the front-month rallies but the back-month contracts stay closer to their prior range (a backwardation increase). If the shock is priced as sustained, the whole curve shifts. Watching the June 2027 Brent contract move relative to the front-month tells you which framing the market is applying.

Read three: the currency pattern. Petroleum-exporter currencies (NOK, CAD, MXN) rise on a sustained oil shock and hold their gains. On a temporary shock they rise then give back. Watching these currencies against the dollar over the following week is a market-based read of sustainability.

Common misreadings

Treating the initial spike as the full move. Oil shocks often produce initial spikes that overshoot the sustained level and give back over 3 to 10 sessions. The 9.2 percent Monday move is the initial reaction; the sustained level is likely somewhere between the pre-shock $76 and the Monday close of $83, with the specific level determined by how the situation evolves.

Assuming symmetric response to shocks in either direction. The Fed responds asymmetrically to supply shocks. Supply-driven inflation gets a hawkish response; supply-driven deflation typically does not get a dovish response (the Fed can't push inflation up with rate cuts if the supply factor is not addressed). This asymmetry is present in the current tape.

Conflating oil-shock inflation with monetary inflation. A 20 percent oil shock produces roughly 0.5 percentage points of headline CPI passthrough. That is not the same as a 0.5 percentage point rise in underlying inflation. When the shock passes, the passthrough passes; what remains is whatever underlying inflation trend was in place beforehand.

Where this framework fits

The oil-inflation transmission framework sits alongside the other macro references we've published:

• A plain-English guide to oil markets. The mechanics of Brent vs WTI, OPEC+, and the physical market structure.
• A plain-English guide to real yields. The primary channel through which the shock hits gold and the dollar.
• A plain-English guide to breakevens. The market-implied inflation expectations mechanism.
• A plain-English guide to CPI components. Where the passthrough shows up in the actual data.

Together they cover the supply-side channels that produce the shock, the price channels that transmit it, the market-implied expectations that price it in advance, and the data prints that eventually confirm it. Today's Brent surge is at the beginning of a chain that will play out over the coming weeks; the framework here is the manual for reading each step of that chain.