AECO Natural Gas Price

Alberta and northeast British Columbia produce far more gas than the local market consumes, so the surplus must travel — east toward Ontario, south into the US Midwest and Pacific Northwest, or west as LNG feedgas. Every route has finite pipeline capacity, and the marginal molecule has to be priced low enough to justify the haul. That structural export dependence keeps AECO below Henry Hub most of the time.

The discount is not constant. In well-supplied years with pipeline maintenance underway it has blown out to the point of near-zero — and briefly negative — intraday prints, while cold snaps that spike local heating and power demand can pull AECO up toward, and occasionally above, Henry Hub. The AECO-Henry basis, not the outright price, is what most Canadian market participants actually trade and hedge.

The NGTL system's summer maintenance program periodically restricts receipt capacity exactly when heating demand is at its lowest. With storage the only meaningful buffer, even routine maintenance can strand supply and crush the spot price for days at a time. AECO printed negative during severe maintenance squeezes in October 2017 and September 2019, and deep-discount summer episodes remain a recurring feature of the hub.

Winter flips the dynamic: Alberta's own heating and power demand absorbs more local supply, intra-Alberta deliverability tightens, and AECO volatility shifts from takeaway-driven to weather-driven.

The startup of LNG Canada at Kitimat created the first large-scale demand pull on Western Canadian gas that does not route through the US. Feedgas flowing west on Coastal GasLink is incremental structural demand measured in billions of cubic feet per day, and its ramp-up is the biggest change to the AECO supply-demand balance in a decade. How much of the WCSB's production growth it absorbs — and how quickly subsequent phases and other projects follow — is the central question for the hub's forward pricing.

Western Canadian producers value their unhedged production and make shut-in decisions against AECO. Alberta's power market watches it because gas-fired generation sets the marginal electricity price in the province. Industrial users — petrochemicals, oil sands steam generation, fertilizer — buy against it. And basis traders on both sides of the border trade AECO against Henry Hub, Chicago, and Pacific Northwest hubs as a spread.