Ethane

Ethane is the lightest natural gas liquid, two carbon atoms recovered from raw natural gas at processing plants. It has essentially one use: feedstock for steam crackers making ethylene. That single-purpose nature gives ethane a unique price anatomy. When petrochemical demand is weak, processors leave ethane in the gas stream and sell it for its heating value, a practice called ethane rejection, so the Mont Belvieu price rarely falls far below its fuel-value floor set by Henry Hub natural gas. When cracker demand and exports run hard, ethane trades at a premium to that floor, and the premium is the market's real signal.

The shale boom turned the US into the dominant ethane supplier. Production reached roughly 3.1 million barrels per day in 2025, far more than domestic crackers consume, and the surplus moves abroad. Enterprise opened the Morgan's Point export terminal on the Houston Ship Channel in 2016, and a fleet of very large ethane carriers now delivers US ethane to Reliance in India, Satellite Chemical and other crackers in China, and INEOS plants in Europe. Exports ran at roughly 580,000 barrels per day in 2025, with the first phase of Enterprise's Neches River terminal near Beaumont loading its first cargoes in July 2025 and a second phase due in the first half of 2026.

That export dependence carries political risk. In late May and early June 2025 the US Commerce Department imposed license requirements on ethane exports to China during the tariff confrontation, stranding loaded cargoes before the requirement was lifted on July 2, 2025 as part of the trade truce. The episode reminded the market that ethane, unlike crude, has so few alternative buyers that a single policy decision can shut in the marginal barrel.