STOCK-BASED COMPENSATION

In 2013, the Compensation Committee of the Board of Directors approved equity awards (the “2013 Awards”) consisting of stock options, restricted stock units (“RSUs”) and performance restricted stock units (“PRSUs”). The RSUs provide for full “cliff” vesting three years from the date of grant. The PRSUs provide for full “cliff” vesting after three years if the Compensation Committee certifies that the performance goals set with respect to the PRSUs have been met. Upon vesting, the holder will receive one share of common stock of the Company for each vested RSU or PRSU. The stock options vest over a four-year period and have a maturity of ten years from the issuance date. Option exercise prices are equal to the common stock fair market value on the date of grant. The following table summarizes the 2013 Awards:



(Shares in millions)	Number of Shares	Weighted-Average Grant-Date Fair Value		Weighted-Average Exercise Price
Stock options	1.3	$	10.06	$	63.86
Restricted stock units (RSUs/PRSUs)	0.5	59.03		—

The fair value of RSUs and PRSUs was determined by reducing the closing market price on the date of the grant by the present value of projected dividends over the vesting period. The Company uses a binomial option pricing model to estimate the fair value of the stock options granted. Lattice-based option valuation models, such as the binomial option pricing model, incorporate ranges of assumptions for inputs. The risk-free rate of interest for periods within the contractual life of the option is based on a zero-coupon U.S. government instrument over the contractual term of the equity instrument. Expected volatility is based on implied volatility from traded options on the Company's stock and historical volatility of the Company's stock. The Company uses historical data to estimate option exercise timing and employee termination rates within the valuation model. The weighted-average dividend yield is based on historical information. The expected term of options granted is derived from the output of the option valuation model and represents the period of time that options granted are expected to be outstanding. The ranges presented below result from separate groups of employees assumed to exhibit different behavior. The following table summarizes the assumptions used in the models to determine the fair value of the 2013 Awards:



Risk-free interest rate	0.2 - 2.9%
Weighted-average volatility	21.1	%
Dividend yield	2.72	%
Expected years until exercise	6.6 -7.6