Commodity Arbitrage: Types & Strategies in India

Commodity arbitrage is a trading strategy that seeks to profit from a price discrepancy between the same or closely related commodities, contracts or markets.

The basic principle is to buy at a relatively lower price and sell at a relatively higher price. The difference between the two prices represents the gross spread, but it does not necessarily represent the final profit.

For example, if a commodity is available at ₹10,000 in one market and a comparable contract is trading at ₹10,300 elsewhere, the apparent price difference is ₹300. The trader must then consider applicable costs, liquidity and execution conditions to determine whether a genuine arbitrage opportunity exists.

Types of Commodity Arbitrage in India

Commodity arbitrage opportunities can arise in different places and between different types of contracts.

1. Inter-Exchange Arbitrage

Inter-exchange arbitrage involves buying a commodity or contract at a lower price on one exchange and selling the same or comparable contract at a higher price on another exchange.

For example, if a comparable gold contract is available at ₹70,000 on one exchange and ₹70,300 on another, a trader may buy at ₹70,000 and sell at ₹70,300.

However, the price difference must be large enough to cover brokerage, taxes, exchange charges and other trading costs. Liquidity and the ability to execute both trades at the expected prices are also important.

2. Geographic or Spatial Arbitrage

Geographic arbitrage occurs when the same physical commodity is available at different prices in different locations.

For example, suppose a commodity is available for ₹1,000 in one location and ₹1,150 in another. The ₹150 difference may appear attractive, but the trader must consider transportation, storage, handling and other costs before deciding whether an opportunity actually exists.

The strategy is therefore based on the price difference between locations, rather than simply the quoted prices.

3. Inter-Commodity Arbitrage

Inter-commodity arbitrage involves two different but related commodities.

For example, crude oil and natural gas are economically related commodities because both are important sources of energy. If the price relationship between them changes significantly, a trader may take positions in both commodities, expecting the difference between their prices to move back towards its usual range.

However, the relationship between two commodities can change because of supply, demand and other market conditions. Therefore, the price difference may not always return to its previous level.

4. Spot-Futures Arbitrage

Spot-futures arbitrage looks at the difference between the current market price of a commodity and its futures price.

For example, suppose gold is available in the spot market at ₹70,000 while a futures contract is trading at ₹71,500. If the difference is large enough after considering the costs of holding the commodity, a trader may be able to create an arbitrage position.

This type of opportunity is closely connected to cash-and-carry and reverse cash-and-carry strategies.

5. Calendar or Time-Based Arbitrage

Calendar arbitrage focuses on price differences between futures contracts for the same commodity but different expiry months.

For example, suppose October Gold Futures are trading at ₹70,000 while December Gold Futures are trading at ₹71,000.

A trader can take positions in both contracts and focus on how the ₹1,000 difference changes rather than simply predicting whether gold will rise or fall.

The difference between the contracts can be influenced by factors such as demand, supply, inventories and the cost of holding the commodity.

What are Common Commodity Arbitrage Strategies

The type of arbitrage describes where the price difference exists. The strategy describes how the trader attempts to benefit from that difference.

1. Cash-and-Carry Strategy

Cash-and-carry is used when a commodity's futures price is higher than its current market price after considering the costs of holding the commodity.

Suppose gold is available at ₹70,000 in the spot market and the futures price is ₹71,500. A trader can buy gold in the spot market and sell the futures contract.

The trader holds the gold until the futures contract approaches expiry. The potential return comes from the price difference after deducting financing, storage, insurance, transportation and trading costs.

The basic idea is:

Futures Price > Spot Price + Holding Costs

If the difference is large enough, a cash-and-carry opportunity may exist.

2. Reverse Cash-and-Carry Strategy

Reverse cash-and-carry is essentially the opposite. It can arise when the futures price is lower than the spot price after considering the relevant costs.

For example, suppose gold is trading at ₹90,000 in the spot market while the futures contract is trading at ₹85,000. A trader may sell or borrow the commodity in the spot market and buy the futures contract.

At expiry, the futures position can be used to cover the position in the physical market. This strategy can be more difficult with physical commodities because selling or borrowing the commodity may not always be straightforward.

3. Calendar Spread Strategy

A calendar spread involves taking opposite positions in futures contracts for the same commodity but different expiry months. For example:

The trader is focusing on the difference between the two expiry prices, rather than taking a simple view that gold will rise or fall. This type of spread trading is recognised as intra-commodity spread trading.

4. Inter-Commodity Spread Strategy

An inter-commodity spread involves taking opposite positions in two related commodities.

For example, a trader may buy crude oil and sell natural gas if the trader expects their price relationship to change in a particular direction.

The trade is based on the relative movement of the two commodities, rather than simply whether either commodity rises or falls.

This strategy can be useful when two commodities have an economic relationship, but it is not risk-free because that relationship can change.

5. Statistical Arbitrage Strategy

Statistical arbitrage uses historical price data and mathematical methods to identify unusual price differences between related commodities or contracts.

For example, gold and silver can show related price movements. If their usual price relationship changes significantly, a trader may take positions in both, expecting the difference between their prices to move back towards its normal range.

Unlike a simple price difference between two markets, statistical arbitrage depends on the expectation that the historical relationship will continue. This creates the risk that the expected relationship may not return.

Why Do Commodity Arbitrage Opportunities Occur?

Price relationships between commodities and contracts are influenced by several market factors. Temporary discrepancies can arise because of:

Spot-Futures Price Differences

Spot and futures prices can move differently because of financing, inventory, demand and supply, and other carrying considerations.

Different Contract Expiries

Futures contracts with different expiry dates can trade at different prices. Changes in this relationship can create calendar spread opportunities.

Market and Location Differences

The same commodity may trade at different prices across markets or locations because of local supply, demand, transportation and availability.

International-Domestic Price Differences

Domestic commodity prices can be influenced by international prices, currency movements and local market conditions.

Temporary Market Imbalances

Heavy buying or selling activity can temporarily distort a price relationship. As traders respond to the discrepancy, prices may move closer together.

READ MORE: What is the Correlation Between Commodities and Inflation?

Is Commodity Arbitrage Risk-Free?

Commodity arbitrage is sometimes described as a low-risk strategy because taking opposite positions can reduce exposure to overall price movements. However, it is not completely risk-free. Transaction costs, execution delays, limited liquidity, financing costs and settlement issues can all affect the outcome.

Therefore, commodity arbitrage should be viewed as a strategy that reduces directional price risk, rather than one that eliminates all forms of trading risk.

Conclusion

Commodity arbitrage allows traders to potentially profit from price differences between related commodities, markets or futures contracts. However, identifying a price difference is only the first step. Traders must assess the spread, liquidity, execution, financing and settlement risks before entering a trade. The basic approach is to identify the price difference, determine whether it presents a realistic opportunity and manage the associated risks before executing the trade.