Copper Delivery Arbitrage and Combined Calendar-Spread Positions
Summary
The article recounts two forms of Shanghai Futures Exchange copper delivery arbitrage. One exchanges warehouse locations by delivering from Ningbo while requesting Shanghai allocation, then seeks to profit if the recipient of the less convenient warehouse stock sells it at a discount. The other exploits differences between fixed delivery premiums for copper brands and changing grade differentials in the physical market, exchanging relatively cheap-to-deliver stock for more valuable stock. Both depend on delivery allocation, physical handling, market access, and the persistence of pricing mismatches.
It also describes combined calendar-spread positions that pair a bull spread with a bear spread around adjacent copper contracts. Historical examples show how the structure was intended to benefit if the relative shape of the curve changed, while one leg could offset losses in the other. The account is anecdotal and based on specific past market conditions; it supplies no systematic backtest or quantified risk model. Warehouse, brand, liquidity, delivery, and basis risks can limit or eliminate the apparent arbitrage.
Key ideas
- Warehouse allocation differences can create opportunities to exchange physical copper locations through futures delivery.
- Fixed delivery premiums across copper brands may diverge from changing physical-market grade differentials.
- A combined calendar-spread position pairs opposing spreads to target changes in the shape of the futures curve.
- The article's examples are historical anecdotes and do not establish repeatable performance.
- Physical logistics, delivery rules, liquidity, and basis changes affect whether apparent arbitrage is realizable.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.