What is Basis Risk in Currency Hedging?

Understanding Currency Futures in India

currency-and-forex-derivatives/currency-derivatives-account-blocked-expiry">Currency futures are contracts that let you buy or sell a specific currency at a predetermined price on a future date. Think of it as booking a price today for a transaction that will happen later. In India, you can trade these contracts on exchanges like the nifty-and-sensex/nifty-sectoral-indices-constructed-represent">National Stock Exchange (NSE). The most popular pair is USD-INR, but others like EUR-INR and JPY-INR are also available. Businesses use them to protect against currency fluctuations, a process called hedging. Speculators also use them to bet on the direction of a currency's value.

When you use futures to hedge, you hope to offset any loss in the physical market with a gain in the futures market. For example, if you need to pay for imports in dollars and the dollar gets more expensive, you lose money. But if you bought a USD-INR futures contract, that contract would increase in value, making you a profit to cover your loss. The goal is to create a stable, predictable cost. However, this process is not always perfect.

What Exactly is Basis Risk?

The relationship between the spot price and the futures price is not always stable. This instability creates basis risk. The 'basis' is the simple difference between the two prices.

Basis = Spot Price - Futures Price

The spot price is the price for immediate delivery of a currency. The futures price is the price for delivery at a future date. In a perfect world, the futures price and the spot price would move together perfectly. If the spot price goes up by 1 rupee, the futures price would also go up by 1 rupee. In this scenario, your hedge would be perfect. Your loss in one market would be exactly cancelled out by your gain in the other.

But the real world is messy. The basis can change unexpectedly. It can get wider (diverge) or narrower (converge). When the basis changes between the time you place your hedge and the time you lift it, your hedge becomes imperfect. The unexpected profit or loss that results from this change is basis risk. It's the risk that your hedge won't work out exactly as planned.

Types of Basis Risk You Might Face

Basis risk doesn't just come from one source. It can appear in several different forms, especially when you are hedging your currency exposure. Understanding these types can help you anticipate and manage them better.

1. Maturity Mismatch

   This is the most common source of basis risk. It happens when the expiry date of your futures contract does not match the date of your actual currency transaction. For example, you need to make a dollar payment on the 15th of March, but the only available futures contract expires on the 28th of March. You would have to close your futures position on the 15th, before it expires. The basis on that day might be different from what you expected, leading to an imperfect hedge.

2. Asset Mismatch (Cross-Hedging)

   Sometimes, a direct futures contract for the currency pair you need might not be available or liquid enough. In such cases, you might use a contract for a different but related currency pair. This is called cross-hedging. For instance, if you needed to hedge against the Thai Baht (THB) and a liquid INR-THB contract was unavailable, you might use USD-INR and USD-THB contracts to create a synthetic hedge. The risk is that the relationship between these two pairs (INR and THB) might change in an unexpected way, creating basis risk.

3. Liquidity and Location Risk

   Even with exchange-traded futures, liquidity can be a factor. For less common currency pairs or contracts far from expiry, there may be fewer buyers and sellers. This can cause a wider gap between the spot and futures prices, increasing the volatility of the basis. Location risk is more common in physical commodities but can apply if futures prices on different exchanges (if permitted) do not move in perfect sync.

A Practical Example of Basis Risk

Let's see how this works with a real-world example. Imagine you are an Indian software company that will receive a payment of 100,000 dollars in three months, on June 1st.

• On March 1st: The current USD-INR spot rate is 83.00. You are worried the rupee will strengthen (dollar will weaken), meaning you'll get fewer rupees for your 100,000 dollars.
• The Hedge: The June USD-INR futures contract is trading at 83.40. You decide to hedge by selling one futures contract to lock in this rate.
• The Basis: On this day, the basis is 83.00 (Spot) - 83.40 (Futures) = -0.40.

Now, let's fast forward three months to June 1st.

• On June 1st: The rupee has indeed strengthened. The USD-INR spot rate is now 82.50. You close your futures position on the same day. The June futures price has also fallen to 82.60.
• The New Basis: The basis is now 82.50 (Spot) - 82.60 (Futures) = -0.10. The basis has changed. It has 'strengthened' from -0.40 to -0.10.

Let's look at your financial position:

Without a Hedge: You would convert your 100,000 dollars at 82.50, receiving 8,250,000 rupees. If the rate had stayed at 83.00, you would have received 8,300,000 rupees. So, you have an opportunity loss of 50,000 rupees.

With the Hedge:

• You made a profit on your futures contract. You sold at 83.40 and bought it back at 82.60. Your profit is (83.40 - 82.60) * 100,000 = 80,000 rupees.
• Your total inflow is 8,250,000 rupees from the payment + 80,000 rupees from the futures profit = 8,330,000 rupees.

The hedge protected you from the falling dollar and even gave you an extra profit. This extra profit of 30,000 rupees came from the change in the basis. If the basis had moved against you, you could have ended up with less than your target amount. This uncertainty is the core of basis risk.

How to Manage Basis Risk

While you can't eliminate basis risk completely, you can certainly manage it. The goal is to make your hedge as effective as possible.

• Match Maturities: Always try to pick a futures contract that expires as close as possible to the date of your underlying transaction.
• Use Liquid Contracts: Stick to hedging with highly traded futures contracts, like the near-month USD-INR contracts on the NSE. High liquidity means the prices are more efficient and the basis is generally more stable.
• Monitor the Basis: Keep an eye on the historical relationship between the spot and futures prices for your currency pair. Understanding its typical behavior can help you anticipate potential issues.
• Accept Imperfection: Understand that hedging is about risk reduction, not risk elimination. A small amount of basis risk is often an acceptable cost for protecting against major currency swings.