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Stock-Based Compensation
6 Months Ended
Nov. 30, 2012
Stock-Based Compensation

NOTE J – Stock-Based Compensation

Non-Qualified Stock Options

During the six months ended November 30, 2012, we granted non-qualified stock options covering a total of 1,000,250 common shares under our stock-based compensation plans. The weighted average option price of $20.59 per share was equal to the market price of the underlying common shares at the grant date. The fair value of these stock options, based on the Black-Scholes

option-pricing model, calculated at the grant date, was $7.71 per share. The calculated pre-tax stock-based compensation expense for these stock options, after an estimate for forfeitures, is $6,921,000, which will be recognized on a straight-line basis over the three-year vesting period. The following assumptions were used to value these stock options:

 

Dividend yield

     2.95

Expected volatility

     52.88

Risk-free interest rate

     0.91

Expected term (years)

     6.0   

Expected volatility is based on the historical volatility of our common shares and the risk-free interest rate is based on the United States Treasury strip rate for the expected term of the stock options. The expected term was developed using historical exercise experience.

Restricted Common Shares

During the six months ended November 30, 2012, we granted 121,400 restricted common shares under our stock-based compensation plans. The fair values of these restricted common shares were equal to the weighted average closing market prices of the underlying common shares on the date of grant, or $20.77 per share. The calculated pre-tax stock-based compensation expense for these restricted common shares of $2,299,000 will be recognized on a straight-line basis over the three-year vesting period.