(5) EARNINGS PER SHARE

Basic earnings per common share is computed by dividing net income (loss) attributable to common stock by the weighted average number of common shares outstanding during the reportable period. The diluted earnings per share calculation adds to the weighted average number of common shares outstanding: the incremental shares that would have been outstanding assuming the exercise of dilutive stock options, the vesting of unvested restricted shares of common stock, performance units and the assumed conversion of mandatory convertible preferred stock. An antidilutive impact is an increase in earnings per share or a reduction in net loss per share resulting from the conversion, exercise, or contingent issuance of certain securities.

In July 2016, the Company completed an underwritten public offering of 98,900,000 shares of its common stock, with an offering price to the public of $13.00 per share. Net proceeds from the common stock offering were approximately $1,247 million, after underwriting discount and offering expenses. The proceeds from the offering were used to repay $375 million of the $750 million term loan entered into in November 2015 and to settle certain tender offers by purchasing an aggregate principal amount of approximately $700 million of the Company’s outstanding senior notes due in the first quarter of 2018. The remaining proceeds of the offering have been used for general corporate purposes.

The mandatory convertible preferred stock issued in January 2015 entitles the holder to a proportional fractional interest in the rights and preferences of the convertible preferred stock, including conversion, dividend, liquidation and voting rights. Unless converted earlier at the option of the holders, on or around January 15, 2018 each share of convertible preferred stock will automatically convert into between 37.0028 and 43.4782 shares of the Company’s common stock (correspondingly, each depositary share will convert into between 1.85014 and 2.17391 shares of the Company’s common stock), subject to customary anti-dilution adjustments, depending on the volume-weighted average price of the Company’s common stock over a 20 trading day averaging period immediately prior to that date. The total potential shares of common stock resulting from the conversion will range from 63,829,830 to 74,999,895 shares.

The mandatory convertible preferred stock has the non-forfeitable right to participate on an as-converted basis at the conversion rate then in effect in any common stock dividends declared and as such, is considered a participating security. Accordingly, it is included in the computation of basic and diluted earnings per share, pursuant to the two-class method. In the calculation of basic earnings per share attributable to common shareholders, participating securities are allocated earnings based on actual dividend distributions received plus a proportionate share of undistributed net income attributable to common shareholders, if any, after recognizing distributed earnings. The Company’s participating securities do not participate in undistributed net losses because they are not contractually obligated to do so.

The following table presents the computation of earnings per share for the three months ended March 31, 2017 and 2016:


	For the three months ended March 31,
	2017		2016
	(in millions, except share/per share amounts)
Net income (loss)	$	351	$	(1,132)
Mandatory convertible preferred stock dividend		27		27
Participating securities - mandatory convertible preferred stock		43		–
Net income (loss) attributable to common stock	$	281	$	(1,159)

Number of common shares:
Weighted average outstanding		493,068,000		382,870,847
Issued upon assumed exercise of outstanding stock options		82,845		–
Effect of issuance of non-vested restricted common stock		770,429		–
Effect of issuance of non-vested performance units		573,721		–
Effect of issuance of mandatory convertible preferred stock		–		–
Weighted average and potential dilutive outstanding		494,494,995		382,870,847

Earnings (Loss) per common share:
Basic	$	0.57	$	(3.03)
Diluted	$	0.57	$	(3.03)

The following table presents the common stock shares equivalent excluded from the calculation of diluted earnings per share for the three months ended March 31, 2017 and 2016, as they would have had an antidilutive effect:


	For the three months ended March 31,
	2017	2016
Unvested stock options	1,854,004	5,732,521
Unvested share-based payment	1,212,396	5,779,820
Performance units	–	297,297
Mandatory convertible preferred stock	74,999,895	74,999,895
Total	78,066,295	86,809,533