How Do Stock Options Work?
Since the exercise price is nearly always the company's stock price on the grant date, stock options become valuable only if the stock price rises, thus creating a discount between the market price and your lower exercise price. However, any value in the stock options is entirely theoretical until you exercise them—i.e., until you pay money to buy the shares at the exercise price. After you have acquired the shares through this purchase, you own them outright, just as you would own shares bought on the open market.
Example: Let’s say you are granted an option to purchase 1,000 shares of company stock with an exercise price of $10 per share (i.e., the stock price on the date of grant). Subsequently, the stock price rises to $50. If you exercise the option with respect to those 1,000 shares at that time, you will pay only $10,000 to obtain shares that are worth $50,000 on the open market.
Depending on the rules of your company's stock plan, options can be exercised in various ways. If you have the means to do so and if the plan allows, you can simply make a straightforward cash payment, or you can pay through a salary deduction. Alternatively, in a cashless exercise, shares are sold immediately at exercise to cover the exercise cost and the income taxes.
Option Value Can Go Up or Down
If your company's stock price rises, the discount between the stock price and the exercise price can make stock options very valuable. That potential for personal financial gain, which is directly aligned with the company's stock-price performance, is intended to motivate you to work hard to improve corporate value. In other words, what's good for your company is good for you.
However, by the same token, stock options can lose value too. If the stock price decreases after the grant date, the exercise price will be higher than the market price of the stock, making it pointless to exercise the options—you could buy the same shares for less on the open market. Options with an exercise price that is greater than the stock price are called underwater stock options.
Beware: Stock Options Will Expire if Not Exercised
Stock options always have a limited term during which they can be exercised. The most common term is 10 years from the date of grant. After the vesting period has elapsed, the actual amount of time to exercise the options will be shorter (e.g., six years after a four-year vesting requirement). If any portion of the option is not exercised before the expiration of the grant term, it is irrevocably forfeited pursuant to the terms of the plan.
Employees who leave the company before the vesting date usually forfeit their options. With vested options, departing employees typically have a strictly enforced timeframe (often 60 or 90 days) in which to exercise—they are almost never allowed the remainder of the original option term.
Alert: Events and changes such as retirement, disability or death can trigger different rules under your stock plan. You should understand what would happen to your grant upon the occurrence of major job events or life events.