What is Reverse Cash and Carry Arbitrage?

Commodity markets involve both spot transactions and futures contracts. The spot market reflects the price for buying or selling a commodity for immediate delivery, while futures contracts involve delivery or settlement at a later date.

These two prices do not always move in perfect alignment. At times, a commodity futures contract can trade below its spot price. Such a situation can create an opportunity for traders who want to benefit from the price difference rather than predict the commodity's future direction.

This strategy is known as reverse cash and carry arbitrage. It involves selling the commodity in the spot market while simultaneously buying its futures contract. The trader aims to benefit when the price gap narrows as the contract approaches expiry.

Before looking at how reverse cash and carry arbitrage works, it is important to understand the broader concept of arbitrage and how traders use price differences across commodity markets.

What Is Arbitrage?

Arbitrage is a trading strategy that seeks to profit from a price difference for the same or closely related commodity across two markets or instruments. The trader buys where the commodity is relatively cheaper and sells where it is relatively more expensive, usually at nearly the same time.

The basic idea is based on the law of one price. If two markets price the same commodity differently, traders can exploit the gap. Their buying and selling activity can eventually push the prices closer together.

Simple Example of Commodity Arbitrage

Suppose gold trades at:

• Spot market: ₹72,000 per 10 grams
• Futures market: ₹72,500 per 10 grams

A trader can buy gold in the spot market at ₹72,000 and simultaneously sell the futures contract at ₹72,500. The initial price difference is ₹500 per 10 grams.

If the spot and futures prices converge as the futures contract approaches expiry, the trader can potentially capture this difference. However, the final profit depends on brokerage, financing, storage, insurance, taxes and other applicable costs.

A similar opportunity can arise in commodities such as silver, crude oil, copper or natural gas when price differences emerge between markets or contracts.

What Is Reverse Cash and Carry Arbitrage?

Reverse cash and carry arbitrage is a market neutral strategy that seeks to profit when the futures price of a commodity is sufficiently below its spot price.

The conventional structure is: Sell the commodity in the spot market + Buy the futures contract

Consider gold trading at ₹72,000 per 10 grams in the spot market. Its futures contract trades at ₹71,500.

The futures market is therefore showing a ₹500 discount.

A trader can sell gold in the spot market at ₹72,000 and buy the futures contract at ₹71,500. If the prices converge by expiry, the trader can use the futures position to cover the spot market position.

The ₹500 difference represents the gross spread, not necessarily the final profit.

The actual return depends on costs such as storage, financing, brokerage, taxes and other applicable charges. Therefore, traders must calculate the net spread before considering the opportunity profitable.

SEBI has described the same strategy in its material on derivatives, including examples where an investor sells the spot position and buys futures when the futures contract trades at a discount.

How Does Reverse Cash and Carry Arbitrage Work?

Suppose silver trades at ₹90,000 per 30 kg in the spot market, while its futures contract trades at ₹89,400.

The initial spread is: ₹90,000 − ₹89,400 = ₹600 per 30 kg

A trader seeking reverse cash and carry arbitrage takes two positions at nearly the same time.

First, the trader sells silver in the spot market at ₹90,000. Depending on the market structure, this may involve physical inventory or an appropriate arrangement for the sale.

Second, the trader buys the corresponding silver futures contract at ₹89,400. The position now looks like this:

The trader has effectively sold silver at a higher price and bought its futures contract at a lower price. The strategy then depends on price convergence rather than the direction of silver prices.

READ MORE: How Inventory Data Affects Crude Oil Prices?

What If the Commodity Price Rises?

Suppose silver reaches ₹91,000 per 30 kg at expiry. The spot position creates a ₹1,000 loss because the trader sold at ₹90,000 and must cover the position at a higher price.

However, the futures position gains ₹1,600 because it was bought at ₹89,400. The difference remains ₹600 before costs.

What If the Commodity Price Falls?

Now suppose silver falls to ₹89,000 per 30 kg. The spot position gains ₹1,000 because the trader sold at ₹90,000. The futures position loses ₹400 because it was bought at ₹89,400.

The initial ₹600 difference again remains before costs.

This is the central feature of the strategy. The trader is not primarily betting on whether silver prices will rise or fall. The objective is to capture the difference between the spot and futures prices.

The same principle can apply to other commodities such as gold, crude oil, copper and natural gas when suitable price differences exist between their spot and futures markets.

Reverse Cash and Carry Arbitrage Example

Consider a trader executing the strategy on 100 units of silver. The commodity trades at ₹3,000 per unit in the spot market, while its futures contract trades at ₹2,970.

The gross spread is: ₹30 × 100 = ₹3,000

Now assume the trader incurs ₹800 in storage and financing costs and ₹600 in transaction-related expenses.

Estimated net spread: ₹3,000 − ₹800 − ₹600 = ₹1,600

The ₹30 discount therefore does not translate into ₹30 of net profit per unit. This is why commodity arbitrageurs focus on the net spread after considering all applicable costs.

Costs can vary significantly across commodities. Physical silver, for example, may involve storage, transportation, insurance and handling expenses. These costs can reduce or eliminate the apparent arbitrage opportunity.

A silver futures contract trading ₹30 below the spot price may look attractive. But if the total cost of executing the trade is ₹35 per unit, the apparent arbitrage opportunity would result in a loss.

Final Takeaway

Reverse cash and carry arbitrage takes advantage of pricing differences between the spot and futures markets for commodities. The strategy involves selling the commodity in the spot market and buying its futures contract, with the aim of profiting when both prices converge.

However, a futures discount does not automatically mean a profitable opportunity. Traders must account for storage, financing, transportation, brokerage, taxes, liquidity and execution costs before entering a trade.

The key is to focus on the net spread rather than the headline price difference. When these costs still leave a positive margin, reverse cash and carry arbitrage can offer a disciplined way to exploit temporary pricing inefficiencies in commodity markets.