Natural gas is a combustible mixture of gases whose largest component is methane, used as a fuel and industrial feedstock. In finance, a gas exposure is a price for specified energy delivered at a particular place and time. A benchmark hedge can offset price changes while leaving the buyer exposed to the cost or availability of getting gas where it is needed.
Price the energy, specify the delivery
Natural gas can be measured by volume, such as cubic feet, or by energy content. MMBtu means one million British thermal units, an energy unit. It does not mean a million cubic feet. Converting a gas volume into MMBtu requires its heat content and the relevant volume-measurement conditions. The EIA's conversion guide explains that gas heat content varies by location, consumer type and time. An average conversion factor is not a universal contract specification.
Suppose a fictional agreement prices 100 MMBtu at USD 3 per MMBtu. Its gross energy notional is
This is an original synthetic amount, before transport, storage, taxes and other charges. It is not an exchange contract size, a current market quote or a futures margin requirement.
The multiplication is simple; identifying the price is the harder part:
| Coordinate | What must be identified |
|---|---|
| Gas quality and units | Acceptable gas specification, energy measurement and quotation basis. |
| Location | The hub or delivery point, and who provides the transport to reach it. |
| Delivery period and profile | When delivery occurs and how the total is distributed across days or hours. |
| Instrument | Physical purchase, forward, futures, swap or option, with its own settlement obligations. |
Henry Hub is an important U.S. pricing reference. For the specific NYMEX Henry Hub Natural Gas futures product, CME's Chapter 220 specifies the delivery facilities near Erath, Louisiana, acceptable gas by reference to the pipeline tariff, and delivery arrangements during the contract month. Those rules do not describe every gas derivative. A futures contract referencing gas is not automatically a right to receive gas at a factory elsewhere.
A total quantity is not a delivery profile
Consider the same fictional 100 MMBtu over two days at one delivery point. Supply arrives as 50 MMBtu each day; the consumer needs 80 MMBtu on the first day and 20 MMBtu on the second. Assume no opening inventory, alternative purchases or balancing arrangements.
The totals match, but the first day has a 30 MMBtu deficit and the second a 30 MMBtu surplus. Later gas cannot serve an earlier need retrospectively. A consumer must arrange flexibility in advance: different supply timing, accessible stored gas, or another source of delivery. Any associated capacity and transport rights must also be available.
Equal energy totals do not imply equivalent delivery. This original synthetic example excludes opening inventory, alternative purchases and balancing arrangements.
Storage is both a stock and a flow constraint
Natural gas is storable, commonly in depleted reservoirs, aquifers and salt caverns. But “gas in storage” does not mean all of it can be delivered immediately. The EIA's storage guide distinguishes working gas, available above the base gas retained for reservoir operations, from withdrawal capacity, the rate at which gas can be taken out. Injection capacity limits the rate at which gas can be put in. These rates depend on facility conditions and can change with inventory levels.
A storage trade therefore needs more than a cheap purchase date and an expensive sale date. It needs usable space, injection and withdrawal capability at the required times, and a route to the delivery point. Financing, fees, losses and operating restrictions also affect its economics. A simple cost-of-carry equation cannot make unavailable capacity tradable. The operational benefit of accessible inventory is related to convenience yield.
Weather risk and location risk survive a benchmark hedge
Heating demand can rise in cold weather; gas-fired electricity generation can raise gas demand in hot weather. Production disruptions, inventories and competing fuels also matter. As the EIA's price-driver guide explains, infrastructure constraints can amplify short-term price changes. Seasonal influences do not force every region or every delivery month into the same curve shape. Today's commodity forward curve records prices for specified future delivery, rather than guaranteeing the later spot-price path.
Location matters because pipelines connect particular production areas, storage sites and consumers. A local price can move differently from a benchmark when transport is constrained. This difference creates basis risk: a hedge may offset a benchmark price rise while failing to offset the full rise in the consumer's delivered cost. Quantity uncertainty adds another mismatch when weather changes how much gas the consumer needs.
The Commodities primer connects physical specifications to storage, forward curves and hedge design. Its preview is public; the full lesson requires a signed-in free account. For gas-specific analysis, start with the actual delivery obligation and available flexibility before choosing a price model or hedge.
Sources
- John C. Hull, Options, Futures, and Other Derivatives, ninth Global Edition, Pearson, 2018, Section 34.3, “Energy Products,” subsection “Natural Gas,” printed pages 799–800. Grounds delivery profiles, location, derivatives and weather-sensitive demand. Title and copyright pages checked in the local text; historical contract specifications are checked against the exchange source below.
- U.S. Energy Information Administration — Natural gas explained, “What is natural gas?” Supports composition and uses.
- U.S. Energy Information Administration — Natural-gas price-unit conversion FAQ, heat-content requirement, variation and volume-basis footnote.
- U.S. Energy Information Administration — Energy conversion calculators, natural-gas calculator and energy-unit table. Supports energy versus volume and the stated basis of conversion factors; no numerical average is used here.
- CME Group — NYMEX Rulebook, Chapter 220: Henry Hub Natural Gas Futures, Sections 220100–220102 and 220106. Supports product-specific quality, location and delivery terms.
- U.S. Energy Information Administration — The Basics of Underground Natural Gas Storage, published 16 November 2015, “Storage Measures.” Supports working gas, base gas and variable injection/withdrawal capacity.
- U.S. Energy Information Administration — Factors affecting natural gas prices, weather, storage and supply/demand sections. Supports qualitative drivers; no historical market prices are used.
- U.S. Energy Information Administration — Natural gas pipelines, “What makes up this transportation network?” Supports the physical links between production, storage and consumers. All external sources checked 27 October 2026.