What Are Stock Options?
Stock options are financial instruments that derive their value from the price of an underlying stock. The term 'stock options' refers to two distinct but related concepts: exchange-traded stock options used for trading and investing, and employee stock options (ESOs) granted as part of compensation packages. Both give the holder the right to buy or sell shares at a specific price, but they differ significantly in how they are obtained, taxed, and used.
Exchange-traded stock options are standardized contracts available on thousands of publicly listed stocks. Investors buy and sell them through brokerage accounts just like stocks. Employee stock options, on the other hand, are granted by companies to their employees as part of compensation and cannot be traded on the open market.
Exchange-Traded Stock Options
Exchange-traded stock options come in two types: calls and puts. A call option gives the buyer the right to purchase 100 shares at the strike price, while a put option gives the right to sell 100 shares at the strike price. These options are standardized, meaning the contract size (100 shares), expiration dates, and strike price intervals are set by the exchange. They can be bought and sold freely through any brokerage that supports options trading.
| Feature | Exchange-Traded Options | Employee Stock Options |
|---|---|---|
| How Obtained | Purchased through a broker | Granted by employer |
| Contract Size | Standardized (100 shares) | Varies by grant agreement |
| Transferable | Yes, traded on exchanges | No, cannot be sold or transferred |
| Types | Calls and Puts | ISOs and NQSOs (calls only) |
| Premium Cost | Market-determined premium | Typically $0 (granted free) |
| Expiration | Days to years | Usually 10 years from grant |
| Vesting | Immediately usable | Typically 3-4 year vesting schedule |
| Tax Treatment | Capital gains/losses | Complex (ISOs vs NQSOs differ) |
Employee Stock Options (ESOs)
Employee stock options are granted by companies as part of compensation packages, especially at technology companies and startups. When you receive ESOs, you are given the right to purchase company shares at a fixed 'grant price' (usually the stock's fair market value on the date of grant) after a vesting period. If the stock price rises above your grant price, the options have intrinsic value that you can capture by exercising them.
There are two types of employee stock options: Incentive Stock Options (ISOs) and Non-Qualified Stock Options (NQSOs or NSOs). ISOs receive favorable tax treatment if certain holding period requirements are met, while NQSOs are taxed as ordinary income upon exercise. Both types typically vest over a 3-4 year schedule with a one-year cliff.
How Stock Option Value Is Calculated
Employee Stock Option Example
- 1Vested options = 1,000 × 75% = 750 options
- 2Intrinsic value per share = $75 - $50 = $25
- 3Total value of vested options = 750 × $25 = $18,750
- 4Exercise cost = 750 × $50 = $37,500
- 5If you exercise and sell immediately: receive $75 × 750 = $56,250
- 6Net gain = $56,250 - $37,500 = $18,750 (before taxes)
Common Uses of Stock Options
- Speculation: Traders buy calls or puts to profit from expected stock price movements with defined risk
- Income generation: Investors sell covered calls on stocks they own to collect premium income
- Portfolio hedging: Fund managers and individual investors buy puts to protect against market downturns
- Employee compensation: Companies grant options to attract and retain talent, aligning employee interests with shareholders
- Leveraged investing: Options provide exposure to 100 shares per contract for a fraction of the stock's cost
- Risk management: Corporations use options to hedge commodity prices, currency exposure, and interest rate risk
Stock Options Tax Considerations
Tax treatment of stock options varies significantly between exchange-traded options and employee stock options, and between U.S. and Canadian taxation. For exchange-traded options, profits from options held less than one year are taxed as short-term capital gains in the United States. For employee ISOs, there is no regular income tax at exercise if you hold the shares for at least one year after exercise and two years after grant, though AMT may apply. NQSOs are always taxed as ordinary income at exercise.
Stock options taxation is complex and varies by option type, holding period, and jurisdiction. Employee stock options in particular can trigger unexpected tax liabilities, including AMT for ISOs. Always consult a qualified tax professional before exercising stock options.
Key Risks of Stock Options
Stock options carry unique risks that differ from owning stock outright. Exchange-traded options can expire worthless, causing a 100% loss of the premium paid. Time decay erodes option value daily. Employee stock options carry concentration risk if a large portion of your net worth is tied to your employer's stock. Both types of options are affected by volatility, and the leverage that makes options attractive also amplifies losses.