A short call is an options trading strategy where a trader sells (writes) a call option. This gives the buyer of the call option the right, but not the obligation, to buy the underlying security at a specified price (strike price) within a predetermined timeframe. The seller of the call option (the short call writer) receives a premium in exchange but assumes the risk if the security’s price rises above the strike price.
Mechanism of a Short Call
In a short call, the trader:
- Sells a Call Option: The trader sells a call option contract to the buyer.
- Receives Premium: In return, the trader receives a premium from the buyer.
- Obligation to Sell: If the buyer exercises the option, the trader must sell the underlying security at the agreed strike price.
Mathematically, the profit/loss (P/L) of a short call can be expressed as:
$$P/L = \min(K - S_T, 0) + C_{premium}$$
- \( K \) is the strike price.
- \( S_T \) is the spot price of the underlying at expiration.
- \( C_{premium} \) is the premium received for selling the call option.
Types of Short Calls
There are two primary types of short calls:
-
Naked Short Call
- The trader does not own the underlying asset.
- Potential for unlimited loss if the stock price rises significantly.
-
Covered Short Call
- The trader owns the underlying asset.
- Losses are limited as the trader can deliver the owned stock if the option is exercised.
Benefits
- Premium Income: The primary benefit is earning the premium from the call option sale.
- Bearish Outlook: Profits if the price of the underlying asset stays the same or declines.
Risks
- Unlimited Loss: Especially in naked short calls, the potential loss is unlimited as the underlying asset’s price can rise indefinitely.
- Margin Requirements: Traders may face significant margin requirements due to the high risk involved.
Example 1: Successful Short Call
- Underlying Stock: XYZ Corp
- Current Price: $50
- Strike Price: $55
- Premium Received: $2
If XYZ Corp’s price remains below $55 until expiration, the call option expires worthless. The trader keeps the $2 premium as profit.
Example 2: Unsuccessful Short Call
- Underlying Stock: XYZ Corp
- Price at Expiration: $60
- Strike Price: $55
- Premium Received: $2
The trader incurs a loss of $3 per share ($60 - $55 - $2 received premium = -$3).
Applicability
The short call strategy is typically used by:
- Advanced Traders: Who have a bearish view on a stock.
- Income Seekers: Looking for consistent premium income.
- Put Option: An option granting the right to sell a security at a predetermined price.
- Strike Price: The set price at which an option holder can buy or sell the underlying security.
- Premium: The price paid by the buyer to the writer of the option.
FAQs
What is the difference between a short call and a long call?
A long call involves buying a call option with the expectation that the underlying stock price will rise. A short call involves selling a call option, typically expecting the stock price will stay below the strike price.
Can you close out a short call position before expiration?
Yes, traders can buy back the same call option to close their short call position before expiration, potentially limiting losses or conserving capital.