Brent and WTI are both light sweet crude grades but they price at the wellhead in different parts of the world — Brent in the North Sea, WTI at Cushing, Oklahoma. The difference between their front-month futures contracts is the spread, and it is one of the most-information-rich numbers in commodity markets when you know how to read it.
What widens the spread
- US production surges — more domestic supply at Cushing depresses WTI relative to Brent.
- Pipeline outages from the Permian to Cushing — strands WTI supply, also depresses WTI.
- Geopolitical events that hit Middle East or North African supply more than US supply — pulls Brent up against WTI.
- European refinery demand pulls — bids up Brent relative to inland WTI.
What compresses it
- US export infrastructure expansion — narrows the dislocation by giving WTI access to global pricing.
- Strategic Petroleum Reserve drawdowns — adds US-sourced supply to the export market.
- US production declines — tightens domestic WTI balance.
- OPEC+ overproduction relative to quotas — adds Brent-priced supply to the global pool.
How to use the signal
A widening spread during a geopolitical shock signals the shock is being priced into Brent specifically — usually Middle East. A widening spread without a geopolitical headline signals a US-specific supply build or pipeline issue. A compressed spread during a Brent rally signals broad global supply tightening rather than a regional shock. Each pattern has implications for whether the rally persists.