Henry Hub Natural Gas
Henry Hub Natural Gas refers to the price of natural gas at the Henry Hub pipeline interconnection in Louisiana, which serves as the primary US natural gas pricing benchmark, with futures contracts traded on the NYMEX priced in US dollars per million British thermal units (MMBtu).
The Henry Hub is a physical distribution point near Erath, Louisiana, where multiple interstate and intrastate natural gas pipelines converge. Because it connects supply from the Gulf of Mexico, the Haynesville Shale, and other producing regions with demand centers across the eastern United States, Henry Hub became the natural commercial reference point for domestic gas pricing. NYMEX Henry Hub natural gas futures, launched in 1990, are the world's most liquid natural gas derivatives contracts.
Natural gas prices are notoriously volatile relative to other commodity benchmarks. The primary driver is the balance between production levels and storage relative to seasonal demand, which is dominated by heating in winter and power generation for air conditioning in summer. Because natural gas cannot be easily stored in large volumes (it requires compression or liquefaction), supply-demand imbalances translate quickly into sharp price moves. Henry Hub prices have ranged from below $2 per MMBtu during oversupply periods to above $10 per MMBtu during supply crunches, a wider relative range than most major commodity markets.
The US shale revolution fundamentally altered the natural gas market. Hydraulic fracturing unlocked vast reserves of tight gas associated with shale formations, particularly the Marcellus (Pennsylvania and West Virginia), Haynesville (Louisiana and Texas), and Permian Basin (Texas) plays. US natural gas production tripled between 2005 and 2023, turning the country from a potential LNG importer into the world's largest LNG exporter. This export connection means that Henry Hub prices are now increasingly influenced by global LNG demand from Europe and Asia, particularly since the Russian invasion of Ukraine elevated European gas prices and demand for US LNG.
For equity investors, Henry Hub pricing directly affects the revenues and earnings of natural gas-focused E&P companies, midstream pipeline operators, and LNG terminal operators. Power generators using natural gas as fuel see input cost fluctuations affect their margins. The spread between natural gas prices and power prices — the spark spread — is a key profitability metric for gas-fired power plants.
The EIA publishes weekly natural gas storage reports showing how much gas is injected into or withdrawn from US underground storage facilities. These reports are a primary market-moving data point, as storage levels relative to seasonal norms signal the tightness or looseness of the supply-demand balance going into the next heating or cooling season.