Options Explained Simply: What Are Calls and Puts?

Say you've found a new car you love, but you're not 100 percent sure yet. You pay the dealer a small non-refundable deposit to hold today's price for a month. If prices go up in that month, you still buy at the old price and you're ahead. If prices drop, you walk away and only lose the deposit. That's exactly what an option is.

In this article you'll learn, in plain words, what options are, how calls and puts differ, how much risk buyers and sellers take, and how options connect to the rest of the market.

What is an option?

Investor.gov, the US Securities and Exchange Commission's site for investors, explains that an option gives the buyer the right, but not the obligation, to buy or sell an asset at a set price within a set period of time.

A few key words:

• Strike price: the price the right is based on, like the price written in your deal with the dealer.
• Expiration: the last day you can use the right.
• Premium: what you pay for the right, the deposit.
• Contract size: for US stock options, one contract usually covers 100 shares.

Calls and puts: two kinds of rights

A call is the right to buy

When you think the price will go up, you buy a call. The car deposit above is a call: the right to buy at today's price.

A put is the right to sell

Think of a put as insurance for your stocks, like the car or home insurance you pay for every year. You pay a little so that if something bad happens, the big loss is covered. If the price crashes, a put lets you sell at the higher price you locked in earlier.

Risk for buyers and sellers

Every option has a buyer and a seller:

• The option buyer pays the premium and gets the right. The most the buyer can lose is the premium.
• The option seller collects the premium and takes on the obligation. The best the seller can do is keep the premium, but the risk can be huge. For example, someone who sells a call faces unlimited losses if the stock keeps climbing.

That's why beginners are usually told to start on the buying side with small amounts.

Practical example: a call and a put

This example is hypothetical and the numbers are simplified.

Buying a call

• A stock is at 100 dollars and you think it will rise within a month.
• You buy a call with a 100 dollar strike. The premium is 3 dollars per share, so one contract (100 shares) costs 300 dollars.
• Break-even: 103 dollars (strike plus premium).
• If the stock is at 110 at expiration, your call is worth 10 dollars per share, or 1,000 dollars. Net profit: 700 dollars.
• If the stock ends below 100, the call expires worthless and you lose the 300 dollars, and not a cent more.

Buying a put as insurance

• You own 100 shares at 100 dollars and you're worried about a drop.
• You buy a put with a 95 dollar strike and pay 2 dollars per share, so 200 dollars.
• If the stock crashes to 80, you'd have lost 2,000 dollars without protection. With the put you can sell at 95, so your loss is 500 dollars on the shares plus the 200 dollar premium: 700 dollars.

See? The put didn't stop the drop, but it turned a big loss into a smaller one, just like insurance.

How big is the options market?

Huge, and growing. The Options Clearing Corporation (OCC), which clears US listed options, cleared about 15.3 billion contracts in 2025, up from around 12 billion in 2024. Millions of option contracts change hands every day, and that volume affects the whole market.

How options connect to other markets

• The VIX "fear gauge" is built from options. Cboe calculates the VIX from the prices of S&P 500 index options. It shows how much movement the market expects over the next 30 days. When stocks fall, demand for puts (the insurance) usually jumps and the VIX rises with it. That's why it's nicknamed the fear gauge.
• Fear spreads. When the VIX climbs, traders usually pull back from riskier assets, and you can see the effect in stock indices, riskier currencies and even crypto. So even if you never trade options, the VIX is a free thermometer for the mood of the market.
• Heavy options activity can move prices. With so many contracts trading, the people who sell options have to hedge their risk, and that hedging can push stock and index prices around. We'll cover this in detail in a separate article.

These relationships are not fixed rules; sometimes stocks and the VIX rise together. Use them to understand the market better, not to predict it.

Common mistakes

• Buying super cheap, far-away options: they're cheap because the chance of them paying off is small.
• Forgetting about time: options expire, and as expiration gets closer their time value melts away.
• Selling options without understanding the risk: collecting premium is tempting, but a seller's losses can be very large.
• Forgetting to multiply by 100: a 3 dollar price on the screen means 300 dollars for one contract.
• Seeing options only as a gamble: one of their main jobs is insuring what you already own.

Practical checklist

• I know whether I'm buying a call or a put, and why.
• I've checked the strike, the expiration date and the contract size.
• I've worked out my break-even point.
• I know my maximum loss.
• I've looked at the VIX and the overall mood of the market.

Frequently asked questions

Are options suitable for beginners?

Buying options has limited risk, but the ideas are a bit more complex than simple buying and selling. Practise first with very small amounts or a demo account.

Do I have to actually buy or sell the stock?

No. You can sell the option itself before it expires and take your profit or loss. Many traders do exactly that.

Why does an option lose value over time?

Part of an option's price is the value of the time left. The closer you get to expiration, the less time there is for the price to move, so that value shrinks.

Does a high VIX mean I should sell everything?

Not necessarily. A high VIX means the market expects bigger swings. It's a signal to trade more carefully and with smaller size.

Wrapping up

An option means buying a right, not an obligation: a call is the right to buy, a put is the right to sell. Buyers can lose at most the premium, while sellers carry bigger risks. Options are tools for both profit and protection, and the market's fear gauge, the VIX, comes straight out of them.

To learn step by step, check out the free courses and take a look at the pro tools in software.

Adapted from: Investor.gov, Options Industry Council, OCC and Cboe

Trading involves a significant risk of loss. This article is for education only and is not financial advice.