Natural Gas Definition: Natural gas is a fossil fuel made mostly of methane that is burned for heating, electricity generation and industrial processes. In the United States it is priced through NYMEX futures delivered at the Henry Hub pipeline junction in Louisiana, with each contract covering 10,000 million British thermal units (MMBtu). Because gas is costly to store and transport, its price reacts sharply to weather and regional supply shocks.
What Is Natural Gas?
Every cold snap in the northern hemisphere is also a trading event. Millions of homes turn up the heating at once, power plants burn more fuel, and the price of the gas that feeds them can jump 10% in a day. Few commodities are tied as closely to the weather.
Chemically, natural gas is mostly methane, pulled from underground reservoirs, often alongside crude oil. It moves to users through pipelines or as liquefied natural gas (LNG), gas cooled to about −162°C so that it shrinks to roughly 1/600th of its volume and can travel by tanker. Around the world it heats buildings, generates a large share of electricity and serves as a raw material for fertiliser and plastics.
Unlike crude, which is a single global market with local price differences, gas trades in regional markets. The main US benchmark is Henry Hub, a pipeline junction in Erath, Louisiana. Europe prices gas at the Dutch TTF hub, and Asian buyers use LNG price assessments. LNG shipments link these markets, but only up to the capacity of terminals and tankers.
How Does Natural Gas Trading Work?
Beyond the basics, trading gas means trading its futures. NYMEX launched Henry Hub commodity futures in 1990, and they became the reference price for gas across North America. Prices are quoted in dollars per MMBtu, a measure of energy content, and one contract covers 10,000 MMBtu, so a move of 10 cents changes the contract’s value by $1,000.
The market runs on a seasonal cycle. From April to October, producers pump more gas than consumers burn, and the surplus goes into underground storage. From November to March, heating demand outruns production and storage is drawn down. Every Thursday the US Energy Information Administration reports how much gas went into or out of storage the week before, and that number moves the price.
Suppose analysts expect a storage injection of 80 billion cubic feet (Bcf) in a summer week, but the report shows only 60 Bcf. The smaller injection means demand was higher than thought, perhaps because a heatwave pushed air-conditioning use and power plants burned extra gas.
Traders now fear storage will be too low going into winter, so they bid the front-month contract from $3.00 to $3.30. A trader holding one long contract gains $3,000 on a 10% move. The same logic runs in reverse when a mild winter leaves storage full, which is why weather forecasts are watched as closely as supply data.
Natural Gas vs. Crude Oil
| Natural Gas | Crude Oil | |
|---|---|---|
| Main US benchmark | Henry Hub, Louisiana | WTI at Cushing, Oklahoma |
| Price unit | Dollars per MMBtu | Dollars per barrel |
| Market structure | Regional, linked by LNG | Global, shipped by tanker |
| Main demand driver | Heating and power generation | Transport fuels |
| Seasonality | Strong, tied to winter and summer weather | Weaker, mainly summer driving demand |
Oil and gas often come out of the same wells, yet their prices can drift far apart. WTI crude and Brent crude trade in a global market where a surplus in one region can be shipped to another within weeks. Gas surpluses often stay trapped until new pipelines or LNG terminals are built.
Why Is Natural Gas Important for Traders?
Gas offers some of the largest moves in the commodity market. Its volatility comes from the gap between fast-changing demand and slow-changing supply: a cold forecast can arrive in a day, while new wells and export terminals take months or years. In August 2022, after Russia cut pipeline supplies to Europe, the Dutch TTF price rose above €300 per megawatt-hour, several times its usual level, and Henry Hub climbed above $9, its highest level since 2008.
Those swings feed straight into inflation. Gas sets the marginal price of electricity in many European markets, so the 2022 spike raised power bills and factory costs across the continent. Traders who follow European bonds or currencies often track TTF for that reason.
Risk management is harder in gas than in most markets. The spread between March and April futures, the last winter month and the first injection month, is known among traders as the “widow-maker” because it can swing violently. In September 2006, the hedge fund Amaranth Advisors lost about $6 billion, mostly on leveraged natural gas spread positions, and collapsed within weeks. Rolling costs add a quieter drag, since gas futures often sit in steep contango ahead of winter.
Key Takeaways
- Natural gas is a methane fuel used for heating, electricity and industry, and in the US it is priced through Henry Hub futures quoted in dollars per MMBtu.
- Gas trades in regional markets linked by LNG shipments, so US, European and Asian prices can differ widely.
- Prices follow a seasonal storage cycle: injections from spring to autumn, withdrawals in winter, with weekly storage data moving the market.
- Weather-driven demand and slow-moving supply make natural gas one of the most volatile major commodities.
- Leveraged spread and calendar positions in gas can produce large losses quickly, as the collapse of Amaranth Advisors in 2006 showed.
What is MMBtu in natural gas prices?
MMBtu stands for one million British thermal units, a measure of energy content. US gas prices are quoted in dollars per MMBtu, and one NYMEX contract covers 10,000 MMBtu.
Why is natural gas more volatile than oil?
Gas is expensive to store and ship, so regional markets cannot quickly absorb a shortage or a glut. Demand also jumps with cold or hot weather, which forecasts can change in days.
Are US and European natural gas prices the same?
No. US gas trades at Henry Hub, while Europe prices gas mainly at the Dutch TTF hub in euros per megawatt-hour. The two markets connect only through LNG shipments, so prices can differ by several times.
Does natural gas follow the price of oil?
Not closely in the United States, where gas has its own supply and demand. Some long-term LNG contracts in Asia are still linked to oil prices, so the two can move together there.
