Difference between Futures and Options
This sub‑topic explains the fundamental differences between exchange‑traded currency futures and options. Understanding these differences is essential for answering exam questions on contract mechanics, payoff profiles, and risk exposure. The content links directly to the module on Exchange Traded Currency Options and prepares you for scenario‑based questions.
Learning Objectives
- 1Identify the key characteristics of currency futures and currency options.
- 2Explain the payoff formulas for futures, call options and put options.
- 3Compare the risk‑return profile of futures versus options.
- 4Apply the concepts to typical NISM exam scenarios.
Currency Futures – Key Features
Currency futures are standardized contracts that obligate the buyer to purchase, and the seller to deliver, a specified amount of foreign currency at a predetermined price on a future date. The contract size, expiry date, and tick size are fixed by the exchange, which ensures high liquidity in the Indian market (e.g., NSE and BSE).
Futures are settled on a mark‑to‑market basis daily. Both long and short positions must maintain the required margin, and any profit or loss is realised each trading day. This daily settlement reduces credit risk but also means the trader must have sufficient funds to meet margin calls.
For the NISM exam, remember that futures provide a linear payoff – profit or loss moves one‑for‑one with the underlying spot rate. Questions often test the distinction between the obligation to transact (futures) and the right but not the obligation (options). Typical traps involve confusing the premium (which does not exist for futures) with the margin requirement.
- Obligation to buy/sell at expiry
- Daily cash‑flow through mark‑to‑market
Students sometimes treat the initial margin for futures as a premium similar to options. Remember: futures require margin (collateral), not a prepaid premium. The premium is unique to options.
Currency Options – Key Features
Currency options give the holder the right, but not the obligation, to buy (call) or sell (put) a specified amount of foreign currency at a predetermined strike price before or at expiry. The buyer pays an upfront premium to the seller for this right.
Unlike futures, options are not settled daily. The premium is the maximum loss for the option buyer, while the seller (writer) faces potentially unlimited risk for uncovered (naked) positions. Options can be exercised American‑style (any time before expiry) or European‑style (only at expiry), and the NISM syllabus focuses on the standard exchange‑traded European style.
Exam‑relevant points include the non‑linear payoff of options, the impact of time value, and the distinction between intrinsic value and premium. A common mistake is to assume the option premium is returned if the option finishes out‑of‑the‑money – it is not.
- Right, not obligation
- Up‑front premium paid by buyer
If an option expires worthless, the premium paid is lost. This is a frequent source of error in exam calculations.
Payoff Structures
The payoff of a currency future is linear and equals the difference between the spot rate at expiry (\(S_T\)) and the futures price agreed at initiation (\(F_0\)). A long position profits when \(S_T > F_0\) and loses when \(S_T < F_0\).
For a currency call option, the payoff is the positive part of the difference between the spot rate and the strike price (\(K\)). If the spot is below the strike, the payoff is zero because the holder will let the option expire.
A currency put option has the opposite payoff: it benefits when the spot rate falls below the strike. The payoff is the positive part of \(K - S_T\). Both option payoffs are non‑linear, creating a curved profit‑loss diagram that the exam often asks you to sketch.
Where:
S_T= Spot exchange rate at contract expiry (INR per unit of foreign currency)F_0= Futures price fixed at contract initiation (INR per unit of foreign currency)Worked Example
Given F_0 = 75 INR/USD and S_T = 80 INR/USD: Step 1: Payoff = 80 - 75 Step 2: Payoff = 5 INR per USD Verification: 80 - 75 = 5.
Where:
S_T= Spot exchange rate at expiry (INR per unit of foreign currency)K= Strike price of the call option (INR per unit of foreign currency)Worked Example
Given K = 75 INR/USD and S_T = 80 INR/USD: Step 1: Compute S_T - K = 80 - 75 = 5 Step 2: Payoff = max(5, 0) = 5 INR per USD Verification: max(80 - 75, 0) = 5.
Where:
K= Strike price of the put option (INR per unit of foreign currency)S_T= Spot exchange rate at expiry (INR per unit of foreign currency)Worked Example
Given K = 75 INR/USD and S_T = 70 INR/USD: Step 1: Compute K - S_T = 75 - 70 = 5 Step 2: Payoff = max(5, 0) = 5 INR per USD Verification: max(75 - 70, 0) = 5.
Futures vs. Options – Comparison Table
Key differences between currency futures and currency options
| Aspect | Currency Futures | Currency Options |
|---|---|---|
| Obligation | Buyer and seller must transact at expiry | Buyer has right, not obligation; seller must honour if exercised |
| Premium | No upfront premium; margin required | Buyer pays premium upfront; seller receives premium |
| Payoff Shape | Linear (straight line) | Non‑linear (convex for calls, concave for puts) |
| Risk for Buyer | Unlimited loss if spot moves against position | Maximum loss limited to premium paid |
| Risk for Seller | Limited to margin; may face loss if spot moves unfavourably | Potentially unlimited loss for uncovered writer |
| Mark‑to‑Market | Daily cash‑flow settlement | Settlement only at expiry (or exercise) |
| Use Cases | Hedging exact exposure, speculation with leverage | Hedging with limited risk, speculative upside with limited downside |
Profit/Loss Profile Chart
Profit/Loss at Different Spot Rates – Futures Long vs. Call Option (Strike 75)
Numerical Example – Choosing Between Futures and Options
Scenario
An exporter expects to receive USD 100,000 in 3 months. The current USD/INR spot is 74. The exporter can either sell a USD futures contract at 75 or buy a USD put option with strike 75, premium 1.5 INR/USD. Margin requirement for futures is 10% of contract value.
Solution
Futures route: Required margin = 10% × (100,000 × 75) = INR 750,000. If at expiry the spot is 70, the futures payoff = (70 - 75) = -5 INR per USD, i.e., loss of INR 500,000, offset by the margin release, resulting in net INR 250,000 loss. Option route: Premium paid = 1.5 × 100,000 = INR 150,000. If spot falls to 70, the put payoff = (75 - 70) = 5 INR per USD, i.e., INR 500,000. Net profit = 500,000 – 150,000 = INR 350,000. If spot stays at 75 or above, the option expires worthless and the exporter loses only the premium of INR 150,000.
Conclusion
The option limits the maximum loss to the premium, making it attractive when the exporter wants certainty about the worst‑case cost. Futures require less upfront cash but expose the exporter to larger adverse moves.
⭐Exam Takeaways
- Futures impose an obligation to buy/sell at expiry; options give a right but not an obligation.
- Futures have no premium; they require margin and are settled daily via mark‑to‑market.
- Option buyers pay a non‑refundable premium; sellers receive the premium and bear the risk.
- Payoff for a long futures contract is linear: \(S_T - F_0\). Call payoff is \(\max(S_T - K,0)\); put payoff is \(\max(K - S_T,0)\).
- Maximum loss for an option buyer equals the premium, whereas a futures buyer can lose more than the initial margin.
- In exam scenarios, compare the risk‑return profile and identify whether the question asks for obligation (futures) or right (options).
- Remember that margin is collateral, not a cost; the premium is a cost incurred upfront.
- Use the comparative table and profit‑loss chart to quickly eliminate wrong answer choices in multiple‑choice questions.
Practice Questions
8 questions on Difference between Futures and Options
What does a currency futures contract obligate the buyer to do at expiry?
What upfront cost does the buyer of a currency option pay?
How are currency futures settled?
A trader enters a long futures contract with F₀=75 INR/USD. At expiry the spot rate S_T is 80 INR/USD. What is the trader’s payoff per USD?
For a currency call option with strike K=75 INR/USD, if the spot at expiry is 70 INR/USD, what is the payoff?
Which term best describes the payoff shape of a currency put option?
An Indian exporter hedges a USD 100,000 receivable using a futures contract at 75 INR/USD. Margin required is 10% of contract value. If spot at expiry falls to 70 INR/USD, what is the net loss after the margin is released?
Which statement correctly describes the maximum loss for the buyer of a currency option?