2. Loss Per Share and Stockholders’ Equity

Basic and diluted loss per share is computed using the two-class method. The two-class method is an earnings allocation formula that determines net income per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. Per share amounts are computed by dividing net income from continuing operations attributable to common shareholders by the weighted average shares outstanding during each period. The dilutive effect of potential common shares is included in diluted earnings per share except in those periods with a loss from continuing operations. Diluted earnings per share excludes the impact of shares of common stock issuable upon the lapse of certain restrictions or the exercise of options to purchase 8.9 million shares for the three and six months ended October 31, 2012, and 13.0 million shares for the three and six months ended October 31, 2011, as the effect would be antidilutive due to the net loss from continuing operations during those periods.

The computations of basic and diluted loss per share from continuing operations are as follows:


						(in 000s, except per share amounts)
		Three months ended October 31,				Six months ended October 31,
		2012		2011		2012		2011

Net loss from continuing operations
attributable to shareholders	$	(101,199)	$	(123,013)	$	(206,849)	$	(242,168)
Amounts allocated to participating securities (nonvested shares)		64		62		137		176
Net loss from continuing operations attributable to common shareholders	$	(101,263)	$	(123,075)	$	(206,986)	$	(242,344)

Basic weighted average common shares		271,145		299,895		274,150		302,693
Potential dilutive shares		-		-		-		-
Dilutive weighted average common shares		271,145		299,895		274,150		302,693

Loss per share from continuing operations:
Basic	$	(0.37)	$	(0.41)	$	(0.76)	$	(0.80)
Diluted		(0.37)		(0.41)		(0.76)		(0.80)

The weighted average shares outstanding for the three and six months ended October 31, 2012 decreased to 271.1 million and 274.2 million, respectively, from 299.9 million and 302.7 million for the three and six months ended October 31, 2011, respectively, primarily due to share repurchases completed during fiscal years 2013 and 2012. During the six months ended October 31, 2012, we purchased and immediately retired 21.3 million shares of our common stock at a cost of $315.0 million. The cost of shares retired during the current period was allocated to the components of stockholders’ equity as follows:


		(in 000s)

Common stock	$	213
Additional paid-in capital		12,542
Retained earnings		302,245
	$	315,000

During the six months ended October 31, 2011, we purchased and immediately retired 13.0 million shares of our common stock at a cost of $177.5 million.

In addition to the shares we repurchased as described above, during the six months ended October 31, 2012, we acquired 0.1 million shares of our common stock at an aggregate cost of $2.4 million. These shares represent shares swapped or surrendered to us in connection with the vesting or exercise of stock-based awards. During the six months ended October 31, 2011, we acquired 0.2 million shares at an aggregate cost of $2.7 million for similar purposes.

We also retired 60.0 million shares of treasury stock during the six months ended October 31, 2012. This retirement of treasury stock had no impact on our total consolidated stockholders’ equity. The cost of treasury shares retired during the current period was allocated to the following components of stockholders’ equity:


		(in 000s)

Common stock	$	600
Additional paid-in capital		35,400
Retained earnings		1,104,797
Total cost allocated		1,140,797
Less cost of treasury shares retired		(1,140,797)
Net impact on consolidated stockholders' equity	$	-

During the six months ended October 31, 2012 and 2011, we issued 0.5 million and 0.8 million shares of common stock, respectively, due to the vesting or exercise of stock-based awards.

During the six months ended October 31, 2012, we granted 0.3 million stock options and 1.4 million nonvested units under our stock-based compensation plans. The weighted average fair value of options granted was $2.36. Stock options or nonvested units granted generally either vest over a three year period with one-third vesting each year or cliff vest at the end of a three-year period. Stock-based compensation expense of our continuing operations totaled $5.4 million and $7.8 million for the three and six months ended October 31, 2012, respectively, $4.5 million and $7.8 million for the three and six months ended October 31, 2011, respectively. At October 31, 2012, unrecognized compensation cost for options totaled $5.2 million, and for nonvested shares and units totaled $28.4 million.