Why did U.S. natural gas storage climb 8.7% to 3,644 Bcf over the past month?
U.S. natural gas storage is 3,644 Bcf now, up 8.7% over the past 30 days. That figure is also the 30-day high, and the 30-day low was 1,818 Bcf, close to half of where the number is today. So the question for anyone who buys gas to run a plant or heat a building this winter is simple: what put all that gas in the ground, and does it change what you do next?
The price
The first number to check is the price of the gas itself. Henry Hub is 2.64, its 30-day low, down 12.7% over the past 30 days. The 30-day high over the same stretch was 3.297. So as the stored volume climbed to its high, the spot price fell to its low. The two moved the way the textbook says they should. When gas is cheap, more of it gets put away rather than burned, and the stored volume rises while the price stays soft.
The seasonal story
That still leaves the why. Late October is injection season. Operators and utilities spend the warm months putting gas into storage and then pull it back out through the cold months. Storage near its high this late in the year means the country is heading into heating season well stocked. A build of 8.7% over a single month, landing at the 30-day high, is consistent with a normal late-season fill rather than anything unusual. Nothing in the data points to a supply shock or a demand collapse. It points to the ordinary calendar doing its work while the price happened to be low enough to reward the people doing the filling.
Winter demand is close
The one piece of outside reporting that touches this is a Reuters line that heating oil has become a hurdle for Republicans in U.S. Senate races as winter nears. I will stay out of the politics. The useful part is the reminder that winter demand is close, and that fuel for heat is already a live worry heading into the cold. A full storage number is the supply side of that same worry. If the gas is in the ground now, the people who need it in January have a cushion. If a cold snap arrives early, that stored gas gets drawn down, and the 3,644 Bcf could fall back toward the 1,818 Bcf low faster than the fill took to build it.
Crude went the other way
To be sure this was a gas story and not a general energy story, I checked crude. Brent is 116.72, up 13.2% over 30 days, and that is the 30-day high; the low was 76.01. WTI is 103.27, up 12.1%, with a 30-day high of 105.83 and a low of 73.69. So crude ran up hard over the same month that gas fell. Oil and gas moved in opposite directions. The gas build is its own event. Gas supply and the gas calendar drove it, and it did not ride any wider move across energy. An operator who runs on gas is getting a break at the same time an operator who runs on crude-based fuel is paying more.
Products split
The products confirm the split. RBOB gasoline is 3.212, down 10.5% over 30 days, off a 30-day high of 3.587 toward a low of 2.839. ULSD diesel futures are 4.984, up 4.4%, below a 30-day high of 5.262 and well above a low of 3.647. So diesel firmed a little while gasoline eased. Diesel is holding its bid as heating demand approaches, and gasoline is fading as driving season ends.
The refiner's margin
The refiner's own margin is where the strain shows. The 3:2:1 crack spread is 56.43 now, down 18.72 over the past 30 days. Crude climbed while gasoline fell, and a refiner caught between those two is working a thinner spread than a month ago. The crack is still a workable number, and refiners who locked product earlier had a strong stretch behind them. The drop of 18.72 is the cost of crude rising faster than the products made from it. On the retail side, the diesel retail-wholesale spread is 1.356, down 0.283 over 30 days, so the street margin on diesel narrowed as the wholesale number firmed under it.
What it means for operators
Put together, the gas storage build at 3,644 Bcf is mostly the plain seasonal fill, encouraged by a Henry Hub price down near 2.64 that made storing gas the sensible move. I am confident of that much. For a fuel operator, the clear read is that gas as an input is cheap right now. Anyone who burns gas to run a facility or heat space is paying less for it than a month ago, and the stored volume says that softness has room to last into the first weeks of winter. For anyone selling gas, the same low price is the cost of a well-supplied market.
What to watch
The part I am not sure of is how long it holds. Storage this full is a buffer, and a cold start to winter could draw it down quickly. The crude and diesel side is pulling the other way, and a gas operator catching a break on one input may still pay up on the diesel that moves the freight. I would take the cheap gas now and not bet the winter price stays here.
And that was just the data. See you tomorrow.