EARNINGS PER SHARE CALCULATION

9 Months Ended

Jul. 31, 2021

The following table presents the calculation of basic and diluted net income per share (in thousands, except per share amounts):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Net income	$	238,232	$	142,267	$	396,697	$	296,250
Basic weighted average shares outstanding	155,271		154,184		155,277		154,136
Effect of dilutive potential common shares	1,473		2,134		1,465		1,605
Diluted weighted average shares	156,744		156,318		156,742		155,741
Basic EPS	$	1.53	$	0.92	$	2.55	$	1.92
Diluted EPS	$	1.52	$	0.91	$	2.53	$	1.90
Antidilutive employee share-based awards, excluded	131		13		99		316

Basic net income per common share (“Basic EPS”) is computed using the weighted average number of common shares outstanding. Diluted net income per potential common share (“Diluted EPS”) is computed using the weighted average number of the following, in each case, to the extent the effect is not anti-dilutive: (i) common shares outstanding; (ii) shares issuable upon vesting of stock unit awards; and (iii) shares issuable under Ciena’s employee stock purchase plan and upon exercise of outstanding stock options, using the treasury stock method.