Options trading is a way to bet on whether a stock price will go up or down without buying the stock itself

An option is a contract that gives you the right—but not the obligation—to buy or sell a stock at a set price by a certain date. You pay a small upfront cost called a premium to own that contract. If the stock moves the way you predicted, you can make money. If it doesn't, you lose only what you paid for the contract. The catch is that options expire, so you have a deadline to act.

Options are different from buying stock because you don't own shares. You're making a time-limited bet on price movement. This means options can move faster and larger than the stock itself—you can make or lose money more quickly with less money down. But that speed and leverage also means options are riskier than holding stock.

Key Takeaways

  • A call option lets you bet a stock price will rise; a put option lets you bet it will fall.
  • You pay a premium upfront to buy an option, and that's the most you can lose if the bet goes wrong.
  • Options have an expiration date, usually weeks or months away, so you must act before time runs out.
  • The stock price has to move past your strike price by enough to cover what you paid for the contract before you make money.
  • Options can amplify gains and losses compared to buying stock, because you control more shares with less money.

Calls and puts: the two basic types

A call option gives you the right to buy a stock at a set price (called the strike price) before the expiration date. You buy a call when you think the stock price will go up. If the stock rises above the strike price, you can buy it at the lower strike price and sell it at the higher market price, pocketing the difference. If the stock stays flat or falls, the call expires worthless and you lose the premium you paid.

A put option gives you the right to sell a stock at the strike price before expiration. You buy a put when you think the stock price will fall. If the stock drops below the strike price, you can sell it at the higher strike price even though the market price is lower, keeping the difference. If the stock rises or stays flat, the put expires worthless.

Both types expire on the same date. Most stock options expire on the third Friday of each month, though some expire weekly. Once the expiration date passes, the contract is gone and you can't use it anymore.

Strike price and how it determines profit

The strike price is the price at which you can buy (for a call) or sell (for a put) the stock. It's set when you buy the option and doesn't change. For example, if Apple stock is trading at $150 and you buy a call option with a $155 strike price, you're betting the stock will rise above $155 by expiration.

The difference between the current stock price and the strike price is called the intrinsic value. If a call has a $155 strike and the stock is at $160, the intrinsic value is $5 per share. But options also have time value—the premium you pay includes both. As expiration gets closer, time value shrinks. On the expiration date itself, the option is worth only its intrinsic value, nothing more.

For you to make money, the stock has to move far enough past the strike price to cover the premium you paid. If you paid $2 per share for a call, the stock has to rise $2 above the strike price just to break even. Any move beyond that is profit.

How premiums work and what they cost

The premium is the price you pay to buy an option. It's quoted per share, but one option contract covers 100 shares, so you multiply by 100. If a call premium is $2, you pay $200 to buy one contract ($2 × 100 shares).

Premiums are higher when the stock is more likely to move in your favor. A call on a stock expected to rise sharply costs more than a call on a stable stock. Premiums also rise as expiration gets further away—you're paying for more time for the stock to move. Premiums fall as expiration approaches because there's less time left for a big move.

The premium is the maximum you can lose if you buy an option. If you pay $200 for a call and the stock doesn't move the way you expected, you lose that $200 and nothing more. You don't owe money beyond what you paid upfront.

Expiration dates and why they matter

Every option has a fixed expiration date. On that date, the contract ends and you can no longer use it. Most individual stock options expire on the third Friday of each month. Some brokers also offer weekly options that expire every Friday.

As expiration approaches, time value disappears. An option that cost $3 a month ago might cost $0.50 a week before expiration, even if the stock hasn't moved. This decay works against you if you're holding a losing position—the option loses value just from time passing, separate from the stock price.

Before expiration, you have three choices: sell the option to someone else, exercise it (buy or sell the stock at the strike price), or let it expire worthless. Most traders sell their options before expiration rather than exercise them, because the option contract itself has value that you can capture by selling it.

Leverage: why options move faster than stocks

Options give you leverage—you control 100 shares of stock with a much smaller upfront cost than buying the stock itself. If Apple is $150 per share, buying 100 shares costs $15,000. Buying a call option on Apple might cost $200. If the stock rises to $160, your 100 shares gain $1,000 in value (a 6.7% return on $15,000). That same $10 move makes your $200 call option worth $1,000 or more (a 400%+ return on $200).

This leverage cuts both ways. A small move against you can wipe out your entire premium. If you paid $200 for a call and the stock barely moves, you lose the full $200. With stock, a small price dip is usually temporary and you can hold until it recovers. With options, time decay and expiration mean you can't wait forever.

Leverage is why options are riskier than stock for most traders. You can lose your entire investment faster, even though the dollar amount is smaller.

Frequently Asked Questions

Can I lose more money than I paid for the option?

If you only buy options, no—the most you lose is the premium you paid. If you sell options (called writing), you can lose much more. Most beginners should focus on buying options only, where your loss is capped.

What happens if I don't sell or exercise my option before it expires?

The contract expires worthless and you lose the premium you paid. Your broker will not automatically exercise it. If you want to use the option, you must act before the expiration date passes.

Do I have to own the stock to buy a put option?

No. You can buy a put on any stock, whether you own it or not. A put is a bet that the price will fall. You don't need to own shares to make that bet.

How do I know what strike price to choose?

Strike prices closer to the current stock price cost more but are more likely to make money. Strike prices further away cost less but require a bigger move to profit. Your choice depends on how much you want to risk and how far you think the stock will move.

Can I sell an option I bought before expiration?

Yes. Most options are sold before expiration rather than exercised. You can sell your option contract to another trader at any time during market hours, as long as there's a buyer. The price you get depends on how much time is left and whether the stock has moved in your favor.