9. Who is the Option Seller (Writer)?
An option seller (also called the writer) is a trader or investor who sells an option contract to another party (the option buyer) and receives the premium paid by the buyer. In return, the seller takes on the obligation to fulfil the contract if the buyer chooses to exercise the option before or on the expiry date.
- The seller does not have the right to exercise the option but is bound by the obligation if the buyer decides to exercise
- The risk for an option seller is potentially unlimited if the market moves significantly in the buyer’s favor
Key Characteristics of an Option Seller
| Feature | Description |
|---|---|
| Receives Premium | Seller receives the premium from the option buyer |
| Obligation | Has the obligation to fulfil the contract if the option is exercised |
| Unlimited Risk | Risk can be unlimited (for Call Options) or large (for Put Options) |
| Limited Profit | Profit is limited to the premium received |
| Time Decay Advantage | Seller benefits from time decay as options lose value with time |
| Liquidity Provider | Sellers provide liquidity to the options market, allowing buyers to trade |
Example: Option Seller in Action
A trader sells a NIFTY 22500 Call Option and receives a ₹100 premium
| Detail | Value |
|---|---|
| Spot Price | ₹22,300 |
| Strike Price | ₹22,500 |
| Premium Received | ₹100 |
| Expiry | 25-Apr-25 |
| Option Type | Call |
| Break-even Point | ₹22,600 (Strike + Premium) |
- If the market rises above ₹22,600, the seller will face unlimited losses as they must sell the underlying asset at the strike price
- If the market stays below ₹22,500, the seller keeps the entire ₹100 premium as profit
Risk and Reward: Option Seller vs Option Buyer
| Feature | Option Seller (Writer) | Option Buyer |
|---|---|---|
| Premium | Receives premium upfront | Pays premium upfront |
| Risk | Unlimited (for Calls) or large (for Puts) | Limited to the premium paid |
| Obligation | Must fulfill contract if exercised | No obligation to exercise |
| Profit | Limited to the premium received | Unlimited (Call) or limited (Put) |
| Strategy | Used for income generation via premium collection | Gains from directional market movement |
Real-Life Analogy
Renting Out Property
- Imagine you rent out your property (the option contract) and collect rent (premium)
- If the renter (option buyer) chooses to move in (exercise), you must provide the property (fulfil the contract)
- If they decide not to move in, you keep the rent as profit (premium)
Just like renting property, the seller collects the premium upfront, but if exercised, they must deliver the underlying asset.
Advantages for the Option Seller
- Premium Income: The seller collects the premium upfront, which they keep regardless of outcome
- Benefit from Time Decay: Out-of-the-money options lose value as expiry approaches, benefiting the seller
- Liquidity: Sellers provide liquidity, making it easier for buyers to enter and exit positions
Key Takeaways
- The option seller receives the premium from the buyer
- The seller has the obligation to fulfil the contract if exercised
- Seller’s risk is unlimited for Call options and significant for Put options
- Profit is limited to the premium received
- Seller benefits from time decay as options lose value near expiry