What Is Call Option?
A call option gives the buyer the right, but not the obligation, to purchase 100 shares at a fixed price before a specific date. Learn how calls work with real examples.
Definition
A call option is a contract giving you the right to buy 100 shares of a stock at a specific price (the strike price) before a specific date (the expiration). You pay a premium upfront for this right. If the stock rises above the strike, your call gains value.
Call buyers profit when the underlying stock rises. Call sellers (writers) collect the premium upfront and profit when the stock stays flat or falls below the strike. Each contract controls 100 shares, so a $2 option premium costs $200 total.
Calls can be used speculatively (betting the stock rises) or as part of strategies like covered calls, where you sell calls against shares you already own to generate income.
Real-World Example
You buy a call option on AAPL with a $180 strike expiring in 30 days for $3 ($300 total). If AAPL rises to $190, your call is worth at least $10 ($1,000), a $700 profit. If AAPL stays below $180, the option expires worthless and you lose the $300 premium.
Why It Matters
Understanding calls is the foundation of options trading — they let you control 100 shares with a fraction of the capital, though with the risk of losing the entire premium paid.
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Frequently Asked Questions
What happens when a call option expires in the money?
If your call is in the money at expiration, it will typically be auto-exercised by your broker — meaning you'd buy 100 shares at the strike price. Most traders sell the option before expiration to capture the value without buying shares.
Can you lose more than you invest with a call option?
As a call buyer, your maximum loss is the premium paid. You cannot lose more than that. Call sellers face theoretically unlimited risk if the stock rises dramatically.
What is a long call vs short call?
Buying a call (long call) gives you the right to buy shares — you profit if the stock rises. Selling a call (short call) obligates you to sell shares if exercised — you collect premium but face unlimited upside risk.
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