Inventory Build
A week-over-week increase in reported commodity stockpiles — typically bearish for price as it signals supply outpacing consumption.
An inventory build (also called a stock build) occurs when commodity stocks increase from one reporting period to the next — supply and imports exceed demand and exports. In crude oil, builds indicate refinery outages, demand weakness, or a production surge exceeding consumption.
Sustained builds create inventory overhangs that weigh on prices and can push futures curves from backwardation into contango as physical holders sell near-term contracts and buy deferred to flatten carrying costs.
Not all builds are equally bearish — a build in shoulder months (spring and autumn) is seasonally expected, while a build in peak demand season signals genuine demand weakness and is more negative for prices.
Example
During a warm El Niño winter, US natural gas storage shows 12 consecutive weeks of above-seasonal builds. Storage reaches 3.8 trillion cubic feet by March — 18% above the 5-year average high. Henry Hub natural gas falls from $3.40 to $1.95/MMBtu by April.
Related Terms
Contango
A market structure where futures prices are higher than the current spot price, creating negative roll yield for long futures holders.
AdvancedInventory Draw
A week-over-week decline in reported commodity stockpiles — typically bullish for price as it signals consumption outpacing supply.
IntermediateSupply and Demand Balance
The net difference between commodity production and consumption in a given period — a surplus weakens prices; a deficit strengthens them.
Intermediate