13.	EARNINGS (LOSS) PER SHARE

Basic earnings (loss) per share is computed by dividing net income (loss) for the period by the weighted-average number of common shares outstanding during the period. Diluted earnings (loss) per share is computed by dividing net income (loss) for the period by the weighted-average number of common shares outstanding during the period, plus the dilutive effect of outstanding restricted stock-based awards, stock options, and shares issuable under the employee stock purchase plan as applicable pursuant to the treasury stock method. The following table sets forth the computation of basic and diluted earnings (loss) per share:

	Three Months Ended February 28,					Nine Months Ended February 28,
(in millions, except per share data)	2018			2017		2018		2017
Net income (loss)	$	(4,024	)	$	2,239	$	418	$	6,103
Weighted average common shares outstanding		4,122			4,107		4,146		4,110
Dilutive effect of employee stock plans		—			97		122		97
Dilutive weighted average common shares outstanding		4,122			4,204		4,268		4,207
Basic earnings (loss) per share	$	(0.98	)	$	0.55	$	0.10	$	1.49
Diluted earnings (loss) per share	$	(0.98	)	$	0.53	$	0.10	$	1.45
Shares subject to anti-dilutive restricted stock-based awards and stock options excluded from calculation⁽¹⁾		190			76		60		75

⁽¹⁾	These weighted shares relate to anti-dilutive restricted service based stock-based awards and stock options (as calculated using the treasury stock method) and contingently issuable shares under PSO and PSU arrangements. Such shares could be dilutive in the future.