A call option is a contract giving you the right — not the obligation — to buy 100 shares of a stock at a specific price (the strike price) before the option expires. The buyer pays a premium for this right. If the stock rises above the strike price, the call gains value. If it doesn’t, you lose only the premium. Call options can generate significant returns on small capital, but they can also expire completely worthless.
For a broader introduction to investing, see How to Invest in Stocks.
Key Call Option Terms
| Term | Definition |
|---|---|
| Strike price | The fixed price at which you can buy the shares |
| Expiration date | The last day the option can be exercised |
| Premium | What you pay to buy the call option |
| In the money (ITM) | Stock price > strike price |
| Out of the money (OTM) | Stock price < strike price |
| At the money (ATM) | Stock price ≈ strike price |
| Intrinsic value | How far ITM the option is (stock price − strike) |
| Time value | The remaining value above intrinsic (decays to zero at expiration) |
| Delta | How much the option price moves per $1 move in the stock (0–1.0 for calls) |
| Theta | Daily time decay — how much value the option loses per day |
| Implied volatility (IV) | Market’s expectation of future price movement; high IV = expensive options |
How a Call Option Works — Step by Step
1. Identify the contract: You choose the stock, strike price, and expiration date.
2. Pay the premium: The premium is quoted per share and multiplied by 100 (one standard contract = 100 shares).
3. Watch the stock move: If the stock rises above your strike before expiration, the call gains intrinsic value.
4. Three choices at/before expiration:
- Sell the option (most common) — capture the gain without buying shares
- Exercise — buy 100 shares at the strike price
- Let it expire — lose the premium; nothing else owed
Worked Example: Buying a Call Option
Setup: Stock XYZ trades at $50. You buy a call option:
- Strike price: $55
- Expiration: 60 days
- Premium: $2.00 per share = $200 per contract (100 shares × $2)
Scenario A — Stock rises to $65 at expiration:
- Intrinsic value: $65 − $55 = $10 per share
- Option worth: $10 × 100 = $1,000
- Your profit: $1,000 − $200 cost = $800 gain (400% return)
Scenario B — Stock stays at $50 at expiration:
- Option expires out of the money (worthless)
- Your loss: −$200 (the premium) — nothing more
Scenario C — Stock rises to $57 at expiration:
- Intrinsic value: $57 − $55 = $2 per share
- Option worth: $2 × 100 = $200
- You break even — recovered your premium cost
Breakeven price = Strike price + Premium paid = $55 + $2 = $57
Call Option Profit and Loss Summary
| Stock Price at Expiration | Option Value | Profit / Loss |
|---|---|---|
| $48 | $0 (expires worthless) | −$200 |
| $53 | $0 | −$200 |
| $55 | $0 | −$200 |
| $57 | $200 | $0 (breakeven) |
| $60 | $500 | +$300 |
| $65 | $1,000 | +$800 |
| $70 | $1,500 | +$1,300 |
Maximum loss: $200 (the premium). Upside is theoretically unlimited as the stock can keep rising.
Common Call Option Strategies
Long Call (Bullish)
Buy a call when you expect the stock to rise. This is the basic strategy above. Best when you expect a significant upward move before expiration. Low capital at risk (only the premium), but options frequently expire worthless — most out-of-the-money calls expire with zero value.
Covered Call (Income Generation)
If you already own 100+ shares, you can sell (write) a call against them. You collect the premium immediately. This is used to generate income on stocks you own but don’t expect to move significantly.
Example: You own 100 shares of XYZ at $50. You sell a 30-day call with $55 strike for $1.50 ($150 premium). If the stock stays below $55, you keep $150. If it rises above $55, you sell your shares at $55 (capped gain) but still keep the $150 premium.
Bull Call Spread (Limited Risk, Limited Reward)
Buy a lower-strike call and sell a higher-strike call simultaneously. Reduces cost (the premium from the call you sell offsets cost of the call you buy) but caps maximum profit.
Example: Buy $50 call for $4, sell $60 call for $1.50. Net cost: $2.50. Max gain: $10 − $2.50 = $7.50. Max loss: $2.50.
LEAPS (Long-Term Calls)
Call options with expiration dates 1–3 years out. Used as an equity substitute to control 100 shares with less capital than buying the shares outright. Time decay is slower on LEAPS, making them more forgiving than short-dated options.
Time Decay — The Option Buyer’s Enemy
Options lose value every day as expiration approaches, even if the stock price doesn’t change. This is called theta decay or time decay.
- An option with 90 days to expiration decays slowly
- An option with 7 days to expiration decays rapidly
- An option on its last day before expiration is nearly all intrinsic value; all time value has decayed to zero
This is why buying far out-of-the-money options on short timeframes is among the highest-risk option strategies — the stock must move far and fast before time value disappears.
Taxes on Call Options
| Situation | Tax Treatment |
|---|---|
| Bought call, option expires worthless | Capital loss (short-term if held < 1 year) |
| Bought call, sold before expiration | Capital gain/loss; holding period determines short vs long-term |
| Bought call, exercised (bought shares) | Option premium becomes part of your cost basis in the shares |
| Sold covered call, option expires | Premium is short-term capital gain regardless of holding period |
| Sold covered call, option exercised | Premium + sale price = total proceeds from stock sale |
Options on broad-based index ETFs (like SPY) may qualify for 60/40 tax treatment under Section 1256 — 60% long-term capital gain rates, 40% short-term, regardless of holding period.
Key Takeaways
- A call option gives you the right to buy 100 shares at the strike price before expiration; maximum loss is the premium paid
- Breakeven = Strike price + Premium paid
- Options can produce large percentage gains on small capital, but most out-of-the-money calls expire worthless
- Time decay (theta) works against option buyers — short-dated OTM calls are the highest-risk strategy
- Covered calls generate income from stocks you already own; bull call spreads reduce cost by capping upside
- For broader investing context, see How to Invest in Stocks and Compound Interest Calculator
The content on Wealthvieu is for informational purposes only and should not be considered financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Full disclaimer · Editorial policy