Definition of exercise

​Definition​ The strike price (or exercise price) is the fixed price per share at which stock can be purchased, as set in a stock option agreement. The strike price is generally set lower (often much lower) than what people expect will be the future value of the stock, which means selling the stock down the road could be profitable.

​confusion​ Stock options is a confusing term. In investment, an option is a right (but not an obligation) to buy something at a certain price within a certain time frame. You’ll often see stock options discussed in the context of investment. What investors in financial markets call stock options are indeed options on stock, but they are not compensatory stock options awarded for services. In this Guide, and most likely in any conversation you have with an employer, anyone who says “stock options” will be referring to compensatory stock options.

​confusion​ Stock options are not the same as stock; they are only the right to buy stock at a certain price and under a set of conditions specified in an employee’s stock option agreement. We’ll get into these conditions next.

​technical​ Although everyone typically refers to “stock options” in the plural, when you receive a stock option grant, you are receiving an option to purchase a given number of shares. So technically, it’s incorrect to say someone “has 10,000 stock options.”

It’s best to understand the financial and tax implications before deciding when to exercise options. In order for the option to be tax-free to receive, the strike price must be the fair market value of the stock on the date the option is granted.

​technical​ Those familiar with stock trading (or those with economics degrees) will tell you about the Black-Scholes model, a general mathematical model for determining the value of options. While theoretically sound, this does not have as much practical application in the context of employee stock options.