NISM Series VIII Equity Derivatives Study Guide: Chapter 5 (Part 1) — Option Trading Strategies
Option trading strategies allow market participants to combine different option contracts (and sometimes the underlying asset) to manage risk, enhance returns, or profit from specific market conditions such as direction, volatility, or time decay. By understanding the risk-return profiles of various combinations, traders can tailor their positions to match their market outlook. This guide covers Part 1 of Chapter 5, focusing on Option Spreads, Straddles, and Strangles.
1. Option Spreads
An Option Spread is a strategy that involves combining options on the same underlying asset and of the same type (either all calls or all puts) but with different strike prices, different maturities, or both. Spreads are designed to limit both the potential risk and the potential reward of a position.
Spreads are broadly categorized into three types based on strike prices and expiration dates:
| Spread Type | Strike | Expiry | Key Feature |
|---|---|---|---|
| Vertical Spread | Different Strikes | Same Expiry | Same expiry, different strike prices |
| Horizontal Spread | Same Strike | Different Expiry | Same strike price, different expiry dates |
| Diagonal Spread | Different Strikes | Different Expiry | Different strike prices and different expiry dates |
1.1. Vertical Spreads
Vertical Spreads are created by combining options that have the same expiry date but different strike prices. These spreads can be constructed using either call options or put options.
Vertical spreads are further classified based on the trader's directional outlook:
- Bullish Vertical Spread: Designed to profit from a moderate rise in the underlying asset's price. It can be created using either call options (Bull Call Spread) or put options (Bull Put Spread).
- Bearish Vertical Spread: Designed to profit from a moderate fall in the underlying asset's price. Like the bullish spread, it can be executed using either calls (Bear Call Spread) or puts (Bear Put Spread).
1.2. Horizontal Spreads (Time or Calendar Spreads)
A Horizontal Spread—commonly referred to as a time spread or calendar spread—involves options of the same strike price and same type (calls or puts), but with different expiration dates.
- Key Characteristic: Because the two legs of the spread expire in different months, the value of the further-month option behaves differently from the near-month option as time decays.
- Payoff Limitation: It is not possible to draw a standard payoff chart for horizontal spreads at a single point of expiration because the options underlying the spread have different expiry dates.
1.3. Diagonal Spreads
A Diagonal Spread is a more complex option combination that involves options having the same underlying asset but different expiry dates as well as different strike prices.
- Execution Complexity: Since this strategy combines both vertical (different strikes) and horizontal (different expiries) dimensions, diagonal spreads are much more complicated in nature and in execution.
- Payoff Limitation: Similar to horizontal spreads, because the two legs of the diagonal spread lie in different maturities, it is not possible to draw a single, definitive payoff chart.
2. Straddle Strategies
A Straddle is a volatility-based strategy that involves two options of the same strike price and the same maturity. It is used when a trader expects a significant price move but is unsure of the direction, or when they expect the market to remain completely stable.
| Strategy | Position | Strike & Expiry |
|---|---|---|
| Long Straddle | Buy Call + Buy Put | Same Strike & Same Expiry |
| Short Straddle | Sell Call + Sell Put | Same Strike & Same Expiry |
2.1. Long Straddle
A Long Straddle is established by buying a call option and buying a put option of the same strike price and same expiry date.
- Market Outlook: The trader expects a substantial price movement in the underlying asset in either direction (highly volatile market). This often occurs ahead of major corporate announcements, earnings releases, or macroeconomic events.
- Risk Profile: The maximum loss is strictly limited.
- Maximum Loss Formula: Maximum Loss = Premium of Call Paid + Premium of Put Paid
- Profit Profile: Potential profit is unlimited. A large price movement in either direction will first allow the trader to recover the total premium paid, after which any further movement generates net profit.
2.2. Short Straddle
A Short Straddle is the exact opposite of a long straddle. It is created by selling (shorting) a call option and selling (shorting) a put option of the same strike price and same expiry date.
- Market Outlook: The trader’s view is that the price of the underlying asset will not move much or will remain highly stable (low volatility market).
- Profit Profile: The trader aims to profit from the collection of the premium. The maximum profit is limited to the total premium received from selling both options.
- Risk Profile: Since the short position is exposed to sharp movements in either direction, the potential loss is unlimited if the market moves significantly away from the strike price.
- Payoff Structure: The payoff chart is the exact inverted version of a long straddle; what constitutes a loss for the long straddle becomes profit for the short straddle.
3. Strangle Strategies
A Strangle is similar to a straddle but is designed to be a lower-cost alternative. It involves buying or selling a call and a put option of the same maturity but with different strike prices. Typically, both options used in a strangle are out-of-the-money (OTM), which makes the strategy cheaper to execute than a straddle.
3.1. Long Strangle
A Long Strangle is created by buying an out-of-the-money call option and buying an out-of-the-money put option with different strike prices but the same expiry date.
- Market Outlook: The trader expects the market to move substantially in either direction.
- Straddle vs. Strangle Comparison: In a straddle, both options share the same strike price. In a strangle, the strikes are different and out-of-the-money.
- Cost Advantage: Because both options are out-of-the-money, the total premium paid is lower compared to a long straddle.
- Profit Condition: The underlying asset's price must move even further in a strangle than in a straddle to become profitable, but the initial capital at risk (the premium paid) is significantly less.
3.2. Short Strangle
A Short Strangle is established by selling (shorting) an out-of-the-money call option and selling (shorting) an out-of-the-money put option with different strike prices and the same expiry date.
- Market Outlook: Like the short straddle, the outlook is that the market will remain stable and range-bound over the life of the options.
- Profit Profile: The maximum profit is limited to the total premium received from shorting the OTM options.
- Risk Profile: The short position faces theoretically unlimited loss if the underlying price moves violently beyond either of the outer strike prices.
- Payoff Relationship: The payoffs for this position are the exact opposite of a long strangle. The short position makes money when the long strangle position is in a loss, and vice versa.
4. Summary Matrix of Key Option Strategies (Part 1)
The following table summarizes the market outlook, execution, risk, and reward structures for the option strategies discussed in Part 1 of Chapter 5:
| Strategy | Components / Execution | Market Outlook | Maximum Risk (Loss) | Maximum Reward (Profit) |
|---|---|---|---|---|
| Vertical Spread | Buy/Sell options of same expiry but different strikes. Can be calls or puts. | Moderate move (Bullish or Bearish) | Limited | Limited |
| Horizontal Spread | Buy/Sell options of same strike but different expiries. | Time-decay play | Limited | Limited (Payoff chart cannot be drawn) |
| Diagonal Spread | Buy/Sell options of different strikes and different expiries. | Multi-dimensional play | Limited | Limited (Payoff chart cannot be drawn) |
| Long Straddle | Buy Call + Buy Put at same strike and expiry. | High volatility / Sharp move in either direction | Total premium paid | Unlimited |
| Short Straddle | Sell Call + Sell Put at same strike and expiry. | Non-volatile / Stable price range | Unlimited | Total premium received |
| Long Strangle | Buy Call + Buy Put at different (OTM) strikes. | Substantial move in either direction (low-cost entry) | Total premium paid (lower than Straddle) | Unlimited |
| Short Strangle | Sell Call + Sell Put at different (OTM) strikes. | Highly stable / Range-bound price | Unlimited | Total premium received (lower than Straddle) |
5. Important Terminology Glossary
- Option Spread: A strategy combining options on the same underlying of the same type (calls/puts) but with different strike prices and/or expiries.
- Vertical Spread: A spread using options with the same expiry date but different strike prices.
- Horizontal (Time/Calendar) Spread: A spread using options with the same strike price but different expiration dates.
- Diagonal Spread: A spread using options with different strikes and different expiration dates.
- Straddle: An option strategy involving a call and a put option with the exact same strike price and maturity.
- Strangle: An option strategy involving a call and a put option with the same maturity but different, typically out-of-the-money, strike prices.
6. Key Takeaways for the F&O Certification Exam
- Payoff Chart Feasibility: You cannot draw payoff charts for Horizontal (Calendar) and Diagonal spreads because the constituent options lie in different contract maturities.
- Cost vs. Movement Trade-off: A Long Strangle requires a larger price movement in the underlying asset than a Long Straddle to achieve profitability; however, it costs less to execute because it utilizes cheaper out-of-the-money options.
- Maximum Loss on Long Volatility Strategies: The maximum loss for both Long Straddles and Long Strangles is limited to the sum of the call and put premiums paid.
- Short Strategy Payoffs: Short Straddles and Short Strangles have inverted payoff structures compared to their long counterparts, earning maximum profit when the market remains completely flat.