14 – 11 Compensation – Thirteenth Edition Gerhart │Newman │Milkovich
and worthless until stock prices rise again.
o This brings up the question of how to compute the value of a stock option.
▪ The most rigorous approach is to use an options pricing model such as
Black-Scholes.
▪ Here, the text provides a demonstration of some basic properties of the
Black-Scholes options pricing model.
• Exhibit 14.11 shows the impact of two parameters on option value,
expressed here as percentage of the stock price.
o First, the higher the volatility, the better.
o Second, the lower the dividend rate, the greater the Black-Scholes
value of an option.
▪ Returns to shareholders for their investment takes the form of
either dividends or price appreciation (an increase in stock
price).
o To use Exhibit 14.11, let’s again take the example of an employee
who receives 100 stock options with an option price of $50/share.
o One concern with stock options is that they sometimes do not link as closely
as desired to performance of the executive.
▪ In a rising market where everyone’s stock is going up, executives can
exercise options at much higher prices than the initial grant price.
▪ In a falling market, stock options are under water
• One response by the corporate compensation committee is to issue
new stock options with a lower exercise price.
▪ A final reason for the concern about stock options as an incentive tool is
the ability to “game the system.”
o Whatever the challenges in paying them, executive decisions have an
important impact on corporate success.
▪ Linking executive compensation to stock price is an effective way to
motivate executives to seek corporate success.