On a napkin
The short version
A physical electricity hedge involves an actual commitment to deliver or receive electricity at a defined location and price. Your fixed-price retail electricity contract is a physical hedge — the supplier delivers electrons to your meter at the contracted rate and manages wholesale market logistics on your behalf. A financial hedge involves no physical delivery. It is a contract settled against a market price index — the buyer continues purchasing electricity from their retailer while the financial instrument runs in parallel, paying or receiving the difference between the contracted price and the market price.
Physical hedges eliminate basis risk at your meter. Financial hedges settled to a hub may leave residual basis risk — the gap between the hub price the contract settles against and your actual delivery node price. During extreme congestion events, this gap can dwarf the hedge itself.
How physical hedges work in practice
When you sign a fixed-price retail electricity contract, your retailer is making a physical hedge on your behalf — they commit to deliver electricity to your meter at the agreed price and absorb all wholesale market and logistics risk. From your perspective, the outcome is simple: you pay the fixed rate regardless of what wholesale prices do. The retailer manages sourcing, transmission scheduling, and market risk within their own portfolio.
Large industrial customers in some ISOs can execute physical hedges more directly — taking title to power, scheduling their own supply, and acting as their own load-serving entity. This requires a scheduling coordinator relationship with the ISO (in CAISO, for example) and significant operational sophistication, but it gives large buyers granular control over their supply stack and the ability to capture market value directly.
How financial hedges work
A financial electricity swap fixes the price of electricity against a wholesale price index without any physical delivery. The buyer continues purchasing electricity from their retail provider. The financial contract runs as a separate bilateral instrument, typically governed by an ISDA master agreement: each settlement period (monthly or quarterly), the contract pays the fixed-to-floating difference. If the settlement index rises above the fixed strike, the swap counterparty pays the buyer. If it falls, the buyer pays the counterparty. Net of both legs, the buyer's effective electricity cost equals the fixed strike.
Financial hedges are used by sophisticated buyers who want to create price certainty across geographies, customize contract structures beyond what retail suppliers offer, separate energy procurement from price risk management, or hedge renewable project revenues against merchant price exposure.
Basis risk — the gap between hub and meter
Financial hedges typically settle against liquid hub prices — PJM Western Hub, CAISO NP15, ERCOT Houston Hub. Your actual electricity cost is determined by the price at your specific load node, which may differ from the hub price during transmission congestion. This hub-to-node price difference is basis, and the risk of it moving against you is basis risk.
During normal conditions, basis is modest and predictable. During extreme events it can be enormous — during Winter Storm Uri in February 2021, ERCOT hub-to-node spreads in some zones reached hundreds of dollars per MWh for days at a time. A buyer financially hedged at the ERCOT Houston Hub but taking delivery at a load zone that diverged sharply found their hedge provided much less protection than anticipated. Buyers using financial hedges in congested markets should consider adding a basis hedge — a financial transmission right (FTR) or congestion revenue right (CRR) — to close this gap.
Common questions
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