Nat-Gas Prices Erase Early Gains on Expectations for EIA Inventories to Build

October Nymex natural gas prices edged down -0.10% on Wednesday, retreating from a 1-week high, driven by expectations of an above-average weekly EIA inventory build of +81 bcf. While initial gains were supported by forecasts for hotter-than-normal US weather boosting demand, significant underlying bearish factors include near-record US natural gas production, with the EIA raising its 2025 forecast to 106.63 bcf/day, and current inventories standing 6.0% above their five-year seasonal average, indicating ample supply.

Analysis

October Nymex natural gas (NGV25) prices are facing conflicting short-term and medium-term pressures, resulting in a slight decline of 0.10% after reaching a one-week high. The immediate bearish catalyst is the market consensus for the upcoming EIA report to show an inventory build of +81 bcf, which surpasses the five-year average of +74 bcf and reinforces a narrative of ample supply. This supply-side pressure is significant, with US dry gas production running at a near-record 106.0 bcf/day (+5.0% y/y) and the EIA raising its 2025 production forecast. Consequently, inventories as of September 5 stood 6.0% above their five-year seasonal average. Countering this is a short-term bullish demand outlook driven by forecasts for hotter-than-normal weather across the US from September 22 through October 1, which is expected to boost electricity demand for air conditioning. This demand is supported by a 0.83% year-over-year increase in weekly electricity output and strong LNG export flows, which were up 5.6% week-over-week. Despite these supportive demand signals and European gas storage being below its seasonal average (81% full vs 87% average), the dominant market factor remains the robust domestic production and elevated storage levels, which are capping price upside.

Key Decisions for Investors

• Investors should closely monitor the upcoming EIA inventory report; a build at or above the +81 bcf consensus would confirm the bearish supply thesis and could trigger further price weakness.
• Be prepared for short-term price volatility, as late-season heat forecasts provide a basis for temporary price spikes, creating potential risks for short positions and opportunities for nimble traders.
• Given that current inventories are 6.0% above the five-year average and production is near all-time highs, any weather-driven rallies should be viewed with caution, as the underlying supply fundamentals may limit their duration and extent.
• Consider the divergence between the well-supplied US market and tighter European storage (81% full vs 87% average) as a factor that could sustain strong LNG export demand, providing a floor for prices despite domestic oversupply.