An energy commodity is a traded fuel or electricity product used to supply heat, power or transport energy. The category includes crude oil, refined fuels, natural gas, coal and wholesale electricity. For a quant, “energy” is a market family: the physical product, delivery terms and infrastructure determine which price risk a position actually carries.
A gas producer, an airline buying jet fuel and an electricity retailer all face energy prices. Their exposures differ because the products cannot be substituted freely, delivered everywhere or moved between dates without constraints.
Give the price a unit and a delivery identity
Suppose a fictional buyer agrees to purchase 100 MMBtu of natural gas at USD 3 per MMBtu, meeting an agreed gas-quality specification at fictional Hub A during delivery window W, with an agreed flow profile. Its gross purchase notional is
This excludes transport, storage, taxes and other charges. It describes a synthetic physical purchase, not an exchange contract size, a margin payment or a current quotation. MMBtu measures heat energy in millions of British thermal units; it does not mean a volume of gas independent of its composition.
The arithmetic identifies a gross cash notional. The specification identifies the energy exposure. All prices, quantities and delivery labels in this purchase ticket are illustrative, not exchange contract terms.
The quantity unit cancels against the quote denominator. Replacing “MMBtu” with “barrels” or “MWh” while leaving the numbers unchanged would describe a different purchase. A common energy-unit conversion can help compare fuels, but equal heat content does not imply equal market value, transport cost or usefulness in a particular machine. The EIA's units guide distinguishes volume, mass and energy measures and explains why fuel-composition assumptions matter when converting them.
Delivery identity also separates a local commodity spot price from a benchmark. The CME Henry Hub rulebook, for example, specifies a gas-quality requirement and a particular delivery hub. A gas buyer elsewhere cannot assume that a Henry Hub price includes the capacity and charges needed to reach its own plant.
Storage changes what “later” means
For crude oil and refined products, tanks, grade compatibility, transport and available handling capacity help determine whether supply can move from one place or date to another. Refining adds another distinction: crude oil and jet fuel are related through production, but they are different deliverable products.
Natural gas depends on pipelines, storage facilities and, where relevant, liquefaction, shipping and regasification. Having gas in storage is different from having enough withdrawal and pipeline capacity to deliver it when required. Weather-sensitive demand can make the delivery season especially important.
Electricity adds a precise time profile and a constrained network. MWh measures energy; MW measures the rate of delivering it. A monthly energy total alone does not say whether supply arrives in the hours a buyer needs. AEMO's National Electricity Market fact sheet describes matching supply and demand in real time as part of operating the Australian NEM.
Electricity storage exists. Batteries and pumped hydro can shift energy between times, but doing so requires equipment, available charging and discharge power, energy capacity and allowance for losses. As the EIA explains, power capacity and energy capacity are different limits, and storage systems use more energy to charge than they later supply. An oil-style warehouse inventory model cannot be transferred unchanged to power. Storage can connect prices across hours without making every hour or location interchangeable.
Hedge the exposure the business actually has
A producer with an unpriced future sale is hurt by falling selling prices; a consumer with an unpriced future purchase is hurt by rising buying prices. A suitably matched futures contract can offset some of that commodity price risk. It does not create missing fuel, pipeline access or grid capacity.
Matching means more than choosing the same energy label. Product or grade, location, quantity, delivery window, within-window profile, pricing currency and settlement reference all matter. Differences between the business's price and the hedge reference create basis risk; uncertain consumption or output also changes how much should be hedged. A cash-settled price hedge and a physical supply agreement solve different parts of the problem.
For the financial link from physical specifications to storage, forward curves and a producer's hedge, the Commodities primer provides a worked introduction. Its preview is public; the full lesson requires a signed-in free account. At the energy-family level, the first task remains to record exactly what, where, when, how much and under which pricing rule before treating a price series as the exposure.
Sources
- John C. Hull, Options, Futures, and Other Derivatives, ninth Global Edition, Pearson, 2018, Section 34.3, “Energy Products,” printed pages 799–801. Grounds the distinction among oil, gas and electricity, delivery location and timing, and weather-sensitive gas demand. The purchase example and figure are original.
- U.S. Energy Information Administration — Energy units and calculators explained, checked 2026-10-27. “Understanding energy units” and “Units for comparing energy.” No fuel conversion factor is assumed in the example.
- U.S. Energy Information Administration — Energy storage for electricity generation, checked 2026-10-27. Storage technologies, power versus energy capacity and charging/discharging losses. Historical capacity totals on that page are not used.
- CME Group — NYMEX Chapter 220: Henry Hub Natural Gas Futures, checked 2026-10-27, Rule 220101. Supports the importance of gas quality and a specified delivery point; the fictional purchase is not a CME contract.
- AEMO — National Electricity Market fact sheet, checked 2026-10-27. Supports real-time supply-and-demand matching in the NEM.