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Investing » Stock Options Explained: How They Work and Why They Matter

Stock Options Explained: How They Work and Why They Matter

Learn what stock options are, how they work, and how traders use them to profit, hedge risks, or earn income in volatile markets.
Author: Baruch Mann (Silvermann)
Interest Rates Last Update: April 1, 2025
The banking product interest rates, including savings, CDs, and money market, are accurate as of this date.
Author: Baruch Mann (Silvermann)
Interest Rates Last Update: April 1, 2025

The banking product interest rates, including savings, CDs, and money market, are accurate as of this date.

We earn a commission from our partner links on this page. It doesn't affect the integrity of our unbiased, independent editorial staff. Transparency is a core value for us, read our advertiser disclosure and how we make money.

The information provided on this website is for informational and educational purposes only and does not constitute financial, investment, or legal advice. We do not provide personalized investment recommendations or act as financial advisors.

Table Of Content

What Are Stock Options?

Stock options are financial contracts that give investors the right, but not the obligation, to buy or sell a stock at a set price before a specific date.

They're commonly used for speculation, hedging, or as part of employee compensation packages. There are two types: call options (the right to buy) and put options (the right to sell).

Many traders use options to profit from market movements without owning the underlying shares.

For example, a bullish investor might buy a call option on Apple stock if they believe its price will rise.

Options are traded on regulated exchanges like the CBOE, offering flexibility, leverage, and risk management tools.

How Do Stock Options Work: Example

When you buy a stock option, you're purchasing a contract tied to 100 shares of the underlying stock.

If you buy a call option on Tesla at a $200 strike price, and the stock rises to $250, you can exercise your option to buy at $200—profiting from the $50 difference (minus the premium paid).

On the other hand, if you buy a put option on Microsoft at $300 and the stock falls to $250, you can sell at $300, profiting from the decline.

Type of Option
Underlying Stock
Strike Price
Stock Price at Expiration
Action
Result
Call Option (Profit)
Tesla
$200
$250
Buy at $200, sell at $250
Profit: $50/share × 100 = $5,000 (minus premium)
Put Option (Profit)
Microsoft
$300
$250
Sell at $300 (via put), buy at $250
Profit: $50/share × 100 = $5,000 (minus premium)
Call Option (Loss)
Netflix
$500
$480
Option expires worthless
Loss: Premium paid for call (e.g., $300 total)
Put Option (Loss)
Apple
$150
$160
Option expires worthless
Loss: Premium paid for put (e.g., $250 total)

Types of Stock Options: Calls vs. Puts

Stock options come in two primary forms: calls and puts, each offering different strategies depending on whether you expect a stock to rise or fall.

  • Call options give the holder the right to buy a stock at a set price before expiration. For instance, if you expect Nvidia's stock to rise, you might buy a call option at a $600 strike price. If the stock hits $650, you profit from the difference minus your initial premium.

  • Put options give the holder the right to sell a stock at a predetermined price. Say you own shares of Meta and fear a drop—buying a put at a $300 strike can let you sell at that price even if the market value drops to $260.

Both types are essential tools in options trading strategies.

What Are Stock Options Used For? Key Strategies

Stock options can be used in a range of strategies, from conservative to high-risk. Here are common use cases with examples:

  • Hedging downside risk: An investor holding Amazon stock might buy put options to limit potential losses if the market turns bearish.

  • Speculating on price movement: A trader expecting short-term gains in Netflix might buy call options instead of the stock to maximize potential upside with lower capital.

  • Generating income: Investors who own stable stocks like Johnson & Johnson might sell covered calls, collecting premiums while potentially giving up some upside.

  • Locking in future prices: A portfolio manager might use options to lock in the future buying price of a stock they expect to rise, helping with planning and budgeting.

Stock Options: Benefits and Risks

Stock options offer flexibility and strategic potential, but they come with real risks. Here’s a breakdown of the pros and cons.

Benefits
Risks
Leverage
Time decay
Limited Downside (For Buyers)
Complexity
Strategic Flexibility
Potential For Total Loss
Income Generation
Unlimited Risk For Sellers
Hedging Protection

Options allow investors to control a large number of shares with relatively little capital. 

Options can be used for bullish, bearish, or neutral positions. You can profit from price moves, volatility, or even time decay with the right strategy.

Investors use puts to protect portfolios during downturns. For instance, a put on S&P 500 ETFs can limit downside in a bear market.

Selling covered calls can generate steady income. A long-term holder of Coca-Cola might sell calls monthly for extra returns.

If the trade goes against you, your maximum loss is limited to the premium paid. This makes options less risky than owning volatile stocks outright.

Options lose value as expiration approaches, even if the stock moves slowly in your favor. A good trade idea can still lose money due to timing.

Understanding option pricing, strategies, and risks takes time. Mistakes are common if you’re unfamiliar with terms like delta, theta, or implied volatility.

If the option expires worthless, the entire premium is lost. This happens often with out-of-the-money options that don’t move enough in time.

Selling naked calls or puts can expose you to significant or even unlimited losses. For example, a naked call seller could face huge losses if the stock skyrockets.

What Affects Stock Option Prices?

An option's value depends on several moving parts, with strike price and expiration being two of the most critical. Here's how they influence pricing.

  • Strike price: The closer the strike price is to the current stock price, the more valuable the option. For example, if Tesla trades at $700, a $680 call is worth more than a $750 call.

  • Expiration date: Time matters—longer-term options are generally more expensive due to the higher chance of favorable movement. A 3-month option typically costs more than a 1-week option on the same stock.

  • Volatility: Higher volatility increases the chance of big price moves, boosting option premiums. A biotech stock with frequent swings will carry pricier options than a stable utility stock.

  • Interest rates and dividends: Rising interest rates can slightly increase call option values. Meanwhile, expected dividends reduce call prices and increase put prices, since dividends benefit stockholders but not option holders.

  • Intrinsic vs. extrinsic value: Options with strike prices already profitable (in the money) carry intrinsic value, while others are valued mostly on time and potential.

Where Can I Trade Stock Options?

You can trade stock options through many online brokerage platforms that offer tools, education, and features tailored to different experience levels.

  • Robinhood: A beginner-friendly app with commission-free options trading. It's simple to use but lacks some advanced tools.

  • Fidelity: Offers solid research tools, screeners, and educational content. It's a good choice for long-term investors dabbling in options.

  • E*TRADE: Provides an easy-to-use platform with options-specific tools, like strategy builders and probability calculators.

  • Webull: Features real-time data and a mobile-friendly interface, making it popular with younger, active traders.

  • Charles Schwab: Known for its Thinkorswim platform, Schwab offers access to options with no base commission and strong customer service.

  • Interactive Brokers: Best for experienced traders, it offers global access, advanced trading features, and competitive pricing on options.

Each platform has its strengths, so choosing the right one depends on your goals, experience level, and need for tools or education.

FAQ

Owning stock means you own a share of the company. Stock options are contracts that let you buy or sell shares at a specific price within a set timeframe.

Not necessarily. While options can be complex, beginner-friendly strategies like covered calls or protective puts offer a good starting point with manageable risk.

Exercising an option means using your right to buy (call) or sell (put) the stock at the strike price. This usually happens when it benefits the holder financially.

Yes, every option contract has an expiration date. If not used or sold by then, the option becomes worthless.

It expires worthless. You lose only the premium paid, which is the cost of buying the option.

A call is in the money when the stock price is above the strike price. A put is in the money when the stock price is below the strike price.

Yes, most traders sell options on the open market before expiration. This is a common way to capture gains or limit losses.

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Picture of Baruch Mann (Silvermann)

Baruch Mann (Silvermann)

Baruch Silvermann is a financial expert, experienced analyst, and founder of The Smart Investor.  Silvermann has contributed to Yahoo Finance and cited as an authoritative source in financial outlets like Forbes, Business Insider, CNBC Select, CNET, Bankrate, Fox Business, The Street, and more.
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This allows us to maintain a full-time, editorial staff and work with finance experts you know and trust. The compensation we receive from advertisers does not influence the recommendations or advice our editorial team provides in our articles or otherwise impacts any of the editorial content on The Smart Investor.

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