Employee Stock Option: Introduction and Valuation

A call option on the common stock of a company is referred to as an employee stock option, it is issued as a form of non-cash compensation. There are restrictions on the option (such as vesting and limited transferability) in order to align the holder’s interest with those of the business’ shareholders. Holders of options experience a direct financial benefit, in case if the company’s stock rises.  This provides an incentive to the employees to behave in such ways that will boost the company’s stock price.

employee_stock_options

Mostly employee stock options are  offered to management as a part of their executive compensation package. They are also offered to lower staff, particularly by those businesses that are not yet profitable. They might also be offered to people other than employees: Such as suppliers, consultants, lawyers and promoters for services rendered.

Overview

Employee stock options (ESOs) are such non-standardized calls that are issued as a private contract between the employer and employee. Over the course of employment, vested ESOs are issued by a company to an employee which are struck at a particular price, that price is generally the company’s current stock price. It depends on the vesting schedule and the maturity of the options, that the employee may elect to exercise the options at some point, that obligates the company to sell the employee its stock at whatever stock price was used as the strike price. At this point, the employee has the right that they may either sell the stock, or hold on to it in the hope of further price appreciation or hedge the stock position having listed calls and puts.

Employee Stock Option valuation

Valuation

The valuation techniques used for standardized options are followed by the value of an ESOs. The same models that are being used in valuing standardized options, such as Black-Scholes and the binomial model, are also used for ESOs. Usually, the only inputs to the pricing model that cannot be readily determined are the appropriate expected time to expiration to use and  the estimate of future realized volatility of the stock. However, in order to provide help in determining appropriate values there are a variety of services that are now offered.

As of 2006, it has been agreed by the International Accounting Standards Board (IASB) and the Financial Accounting Standards Board (FASB) that using an option pricing model the fair value at the grant date should be estimated at the grant date. The Black-Scholes model is applied by the majority of public and private companies, however, through September 2006, the use of a binomial model in SEC filings has been publically disclosed by over 350 companies.

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