Chapter 2: CALL vs. PUT: the key differences
Knowing the difference between CALL and PUT is essential for every options trader. Each behaves very differently depending on how the market moves.
Side-by-side comparison
| Attribute | Call option | Put option |
|---|---|---|
| Profits when | The stock rises | The stock falls |
| Right granted | Buy 100 shares | Sell 100 shares |
| Best for | Bullish outlook | Bearish outlook or hedge |
| Value at expiration | Price − strike (if higher) | Strike − price (if lower) |
In the money and out of the money
- In The Money (ITM):
- Call: stock price > strike price.
- Put: stock price < strike price.
- Out of The Money (OTM):
Exactly the opposite: the contract has no intrinsic value at this point, and its value is made up entirely of time value.
- At The Money (ATM):
The stock price is close to the strike price. The contract's value is almost all time value, so it reacts most to any move in the stock.
💡 Why do traders buy puts?
People buy put options for two main reasons:
- Speculation: to profit directly from falling markets without having to sell shares short (Short Selling).
- Hedging: protecting your portfolio. For example, if you own Apple shares and worry the market will fall, you can buy a put on them. It works like an "insurance policy" that offsets your losses on the shares in a crash.
A two-way example on one stock
A stock trades at $185, and two contracts on either side expire in a month:
| Contract | Call with a $190 strike | Put with a $180 strike |
|---|---|---|
| Premium | $2.50 ($250 per contract) | $2.20 ($220 per contract) |
| Breakeven at expiration | 192.50$ (190 + 2.50) | 177.80$ (180 − 2.20) |
| Profits if | The stock passed $192.50 | The stock fell below $177.80 |
| Max loss | 250$ | 220$ |
Each one needs a move bigger than the premium paid, not just a move in the right direction. If the stock only rises to $191, the call finishes in the money by one dollar, and the trade loses $150 (100 − 250).
Common mistakes
- Thinking the right direction is enough to profit, and forgetting that the premium is part of the distance required.
- Mixing up buying a put (a right to sell, with limited loss) and selling one (an obligation to buy, with potentially large loss).
Summary
A call is a bet on a rise. A put is a bet on a fall, or insurance against one. In both cases the buyer's loss is limited to the premium. Where the price sits relative to the strike (in the money, at the money, out of the money) sets how much of the contract is intrinsic value and how much is time value, which decays every day.
