EARNINGS (LOSS) PER COMMON SHARE

6 Months Ended

Jun. 30, 2021


NOTE 7 – EARNINGS (LOSS) PER COMMON SHARE

Basic earnings per share is computed by dividing Net Income (Loss) by the number of weighted average common shares outstanding during the reporting period. Diluted earnings per share is calculated to give effect to all potentially dilutive common shares that were outstanding during the reporting period, only in the periods in which such effect is dilutive. The following table shows the effect of stock-based awards on the weighted average number of shares outstanding used in calculating diluted earnings per share:


In millions of shares
	Three Months Ended June 30,		Six Months Ended June 30,
	2021	2020	2021	2020
Weighted average common shares outstanding - basic	91.8	91.4	91.7	91.4
Incremental shares outstanding related to stock-based awards	0.3	—	0.4	—
Weighted average common shares outstanding - diluted	92.1	91.4	92.1	91.4

In periods of net loss, stock-based awards are anti-dilutive and therefore excluded from the earnings (loss) per share calculation.


In thousands
	Three Months Ended June 30,		Six Months Ended June 30,
	2021	2020	2021	2020
Options excluded from computation of diluted earnings (loss) per share	1,958	3,258	2,131	3,538
RSUs excluded from computation of diluted earnings (loss) per share	8	354	5	239

PSUs are offered to key employees and are subject to achievement of specified performance conditions. Contingently issuable shares are excluded from the computation of diluted earnings per share based on current

period results. The shares would not be issuable if the end of the reporting period were the end of the contingency period. If such goals are not met, no compensation expense is recognized, and any previously recognized compensation expense is reversed.