How do storage costs shape the commodity futures curve?

Question

AcadiFi · Accepted Answer

Storage costs drive a persistent upward tilt in commodity forward curves, but the magnitude varies enormously by commodity type due to physical and economic storage differences.

Low-storage-cost commodities: Gold has near-zero storage costs (about 0.1% annually in bullion vaults) because it is compact, non-perishable, and already held by central banks. Its curve is almost flat and dominated by the risk-free rate minus lease rates.

Medium-cost commodities: Industrial metals like copper and aluminum have storage costs around 1-2% annually covering warehousing at LME facilities, insurance, and financing of working capital.

High-cost commodities: Natural gas storage costs can reach 10-20% annually because it requires specialized salt cavern or depleted reservoir storage with limited capacity. Seasonal demand amplifies the curve — winter contracts trade at substantial premiums to summer.

```mermaid
flowchart LR
  A[Spot Price] --> B[+ Storage Cost u]
  B --> C[+ Financing r]
  C --> D[- Convenience y]
  D --> E[Forward F]
```

For perishable commodities like coffee or livestock, traditional storage breaks down because physical deterioration makes long-dated storage infeasible. These markets rely more on production timing and inventory signals than carry arithmetic. A risk manager at Summit Trading modeling a coffee hedge therefore treats the curve shape as driven by harvest cycles and weather regime, not by classical cost-of-carry. Understanding these distinctions matters when mapping futures positions to physical risk exposures.

How do storage costs shape the commodity futures curve?

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