Gas Procurement Strategy: Forward Curve Dynamics, Basis Risk, and Timing Across Major Hubs
Gas procurement isn’t about watching one number. Henry Hub is the benchmark, but basis differentials at delivery points across the country are where margins are made or lost. Suppliers buying gas at HH plus a basis spread need to understand the dynamics at every hub they operate in.
The forward curve picture
As winter demand fades, the HH forward curve typically enters contango — front-month prices fall while winter strips hold their premium. For suppliers with fixed-rate customer books, this creates a natural procurement window: lock in summer and shoulder-month supply at the seasonal low, hedge the winter strip separately.
The EIA’s weekly storage report is the single most market-moving data point in natural gas. Storage levels relative to the five-year average drive front-month sentiment. The EIA Weekly Natural Gas Storage Report is required reading.
Basis points that matter
Transco Zone 6 NY (New York): Historically the most volatile basis in the eastern US. Pipeline constraints during polar vortex events have driven basis to extreme levels. NYC-serving suppliers need to hedge Transco Z6 separately from HH.
TCO Pool (Appalachia/Ohio): Typically trades at a discount to HH due to Marcellus/Utica production proximity. Ohio suppliers benefit from this structural discount — but it narrows during high-demand periods.
FGT (Florida): Florida Gas Transmission basis tends to spike during summer cooling demand and hurricanes. Limited pipeline alternatives make FGT basis risk a real concern for Florida-serving suppliers.
Chicago Citygate (Illinois): Major demand center with reasonable pipeline access. Basis is typically stable relative to eastern points, but cold snaps create spikes.
SoCal Citygate (California): Pipeline maintenance and wildfire risk create unique basis dynamics on the West Coast. Not correlated with eastern basis movements.
Algonquin Citygate (New England): The most constrained gas market in the country during winter. Pipeline capacity limitations mean New England basis can blow out to 10x+ of HH during cold snaps. Any supplier serving New England gas customers needs to understand the Algonquin basis risk intimately.
Procurement timing signals
For competitive gas suppliers managing customer books:
- Storage trajectory: If EIA storage is tracking below the 5-year average heading into injection season, the prompt is supported and forward prices rise. If above average, prices compress.
- Production data: Watch the EIA Natural Gas Weekly Update for production trends. Marcellus/Utica output affects every eastern basis point.
- LNG export volumes: Sabine Pass, Cameron, Freeport — LNG feedgas demand now structurally tightens the US gas balance. Higher LNG exports = higher HH floor.
- Weather forecasts: 6-10 day and 8-14 day outlooks from NOAA drive short-term trading. Extended cold forecasts during heating season are the #1 basis spike trigger.
Bottom line: Watching Henry Hub alone is like watching the S&P and ignoring sector rotation. Basis at your delivery point is what determines your margin. Track the hubs that matter to your customer book.