CPI vs WTI Crude Oil
WTI crude swung from $83.85 on April 17, 2026 to $95.85 on April 23, a 14 percent two-week move driven by Strait of Hormuz tensions during the eight-week-old Iran conflict. Headline CPI accelerated to 3.3 percent year-on-year in March 2026, the highest reading since May 2024, with energy up 10.9 percent and gasoline rising 21.2 percent month-on-month, the largest monthly gasoline jump on record.
Also known as: CPI (All Urban) (CPI, consumer price index, inflation) · WTI Crude Oil (WTI, crude oil, oil price, WTI crude)
Why This Comparison Matters
WTI crude swung from $83.85 on April 17, 2026 to $95.85 on April 23, a 14 percent two-week move driven by Strait of Hormuz tensions during the eight-week-old Iran conflict. Headline CPI accelerated to 3.3 percent year-on-year in March 2026, the highest reading since May 2024, with energy up 10.9 percent and gasoline rising 21.2 percent month-on-month, the largest monthly gasoline jump on record. Gasoline alone accounted for roughly three-quarters of the March headline increase. Oil flows directly into CPI through a 2.9 percent gasoline weight and a 3.4 percent household energy weight, with crude-to-pump pass-through running 2 to 4 weeks and second-round inflation effects unfolding over 3 to 6 months.
The Energy Components in CPI
Energy makes up approximately 6.3 percent of the headline CPI basket. The breakdown: motor fuel (gasoline) at 2.9 percent, household energy at 3.4 percent (electricity, piped natural gas, heating oil, propane, and kerosene). Gasoline is the most WTI-sensitive component because retail prices track wholesale gasoline (RBOB) within days, and RBOB tracks WTI within hours.
The 6.3 percent total is small relative to shelter (about 36 percent of CPI) and food (about 13 percent) but can be highly volatile. In March 2026, energy contributed roughly 0.7 percentage points to headline year-on-year inflation. In low-volatility periods, energy can add or subtract less than 0.1 percentage point. The category is therefore a significant swing factor without being a structural driver of inflation outside of supply shocks.
The 2 to 4 Week Crude-to-Pump Pass-Through
A move in WTI crude reaches retail gasoline prices in roughly 2 to 4 weeks. The mechanism: refiners price RBOB futures against WTI within minutes; wholesale gasoline distributors update prices within days as inventories turn over; retail gas stations adjust prices within 1 to 3 weeks depending on regional inventory cycles, contracts, and competition.
The rule of thumb: a $10 per barrel move in WTI translates to roughly $0.20 to $0.25 per gallon at the pump, or about an 8 percent change in retail gasoline. With gasoline at 2.9 percent of CPI, that produces roughly 0.2 percentage points in the headline CPI year-on-year reading after full pass-through. Diesel pricing lags gasoline by 2 to 6 weeks but follows similar mechanics, eventually flowing through to transportation and goods prices over 3 to 6 months.
The March 2026 Energy Shock
WTI averaged about $73 in February 2026 before rising to nearly $95 by mid-March as Iran-related tensions escalated. Retail gasoline jumped from a national average around $3.30 per gallon to $3.95 in three weeks. The CPI report for March 2026, released April 10, showed headline inflation accelerating from 2.4 percent year-on-year in February to 3.3 percent in March, the largest single-month acceleration since June 2022.
The acceleration was almost entirely energy-driven. Energy prices rose 10.9 percent year-on-year (from minus 1.5 percent in February). Gasoline rose 21.2 percent month-on-month, which
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Frequently Asked Questions
What is the current WTI crude oil price?+
WTI futures closed at $95.85 per barrel on April 23, 2026, after a volatile month that saw the price swing from $83.85 on April 17 to $89.61 on April 19 to $95.85 on April 23. The oil market gained roughly 16 percent over the prior week. Brent crude traded above $103 during the same window. The volatility reflects market uncertainty about whether the Strait of Hormuz will remain open during the Iran conflict, with traffic running 30 to 50 percent below normal and insurance war risk premiums elevated to 0.4 percent of hull value.
How much does a $10 oil move add to CPI?+
A $10 per barrel sustained move in WTI translates to roughly $0.20 to $0.25 per gallon at the pump, or about 8 percent of retail gasoline. With gasoline at 2.9 percent of CPI, the direct effect is approximately 0.2 percentage points in the year-on-year headline CPI reading after 1 to 3 months. Adding household energy effects (heating oil, electricity through gas-fired generation) brings the total direct effect to roughly 0.3 percentage points per $10 of WTI. Second-round effects through goods, food, and transportation add another 0.1 to 0.2 percentage points over 6 to 12 months for sustained moves.
How quickly does WTI flow into CPI?+
Crude-to-pump pass-through runs 2 to 4 weeks. RBOB gasoline futures track WTI within hours; wholesale gasoline updates within days; retail prices update within 1 to 3 weeks depending on regional inventory turnover. The CPI then captures the retail price change in the next monthly print. Total elapsed time from a sustained WTI move to a headline CPI year-on-year reading reflecting it is approximately 1 to 2 months. Second-round effects through transportation, food production, and services take 3 to 12 months. The April 2026 CPI report (released May 12) will reflect mid-March through early April WTI averages.
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