Executive summary

Arbitrage links the physical and financial markets. When a futures price diverges from spot plus the cost of carry, a trader can lock the gap: buy physical and sell futures (cash-and-carry), or the reverse. Most durable 'edge' in physical trading is a structured arbitrage across place, time, grade or logistics — and it is bounded by financing and capacity, not by cleverness.

In plain English

• Cash-and-carry: futures expensive vs spot + carry → buy spot, store, sell the future, deliver — lock the spread.
• Reverse cash-and-carry: futures cheap vs spot → sell (or lend out) the physical and buy the future.
• Geographic arbitrage: a grade is cheaper in A than B by more than the freight → move it.
• Quality arbitrage: buy cheap off-spec, blend or upgrade to spec, sell dearer.
• Time arbitrage: store from cheap-now to dear-later (the contango trade).
• Logistics / storage arbitrage: control the scarce ship, tank or berth others can't access.

Why traders care

Arbitrage is the disciplined, low-directional way to make money — you are capturing a structural gap, not betting on direction. But arbitrage is self-correcting: everyone piles in until the gap closes. So the real edge is not spotting the arb (everyone sees it) but being able to execute it — having the storage, the freight, the financing, the credit lines and the counterparties others lack.

Operator connection

An arbitrage only exists if it can be executed within the window: charter the ship, secure the tank, clear customs, present documents, deliver against the future. The operator is precisely what turns a theoretical arbitrage on a screen into a realised one. Without execution capability, the gap is just a number.

Further reading

• CME Group — 'An Introduction to Global Carry' (carry across asset classes).
• Aswath Damodaran (NYU Stern) — notes on futures pricing and arbitrage.
• CME Group — 'What is Contango and Backwardation' (the cost-of-carry foundation of cash-and-carry).