Earnings (Loss) Per Share Calculation

3 Months Ended

Jan. 31, 2014

Earnings Per Share [Abstract]

EARNINGS (LOSS) PER SHARE CALCULATION

EARNINGS (LOSS) PER SHARE CALCULATION

The following table (in thousands except per share amounts) is a reconciliation of the numerator and denominator of the basic net income (loss) per common share (“Basic EPS”) and the diluted net income (loss) per potential common share (“Diluted EPS”). Because the numerator reflects net losses for the periods indicated, both Basic EPS and Diluted EPS are computed using the weighted average number of common shares outstanding. Were the numerator to reflect net income, Diluted EPS would also include, to the extent the effect is not anti-dilutive, the following: (i) common shares outstanding, (ii) shares issuable upon vesting of restricted stock units, (iii) shares issuable under Ciena’s employee stock purchase plan and upon exercise of outstanding stock options, using the treasury stock method, and (iv) shares underlying Ciena’s outstanding convertible notes.

	Quarter Ended January 31,
Numerator	2013			2014
Net loss	$	(47,324	)	$	(15,936	)

	Quarter Ended January 31,
Denominator	2013	2014
Weighted average basic common shares outstanding	101,204	104,501
Weighted average dilutive potential common shares outstanding	101,204	104,501

	Quarter Ended January 31,
EPS	2013			2014
Basic EPS	$	(0.47	)	$	(0.15	)
Diluted EPS	$	(0.47	)	$	(0.15	)

The following table summarizes the weighted average shares excluded from the calculation of the denominator for Basic and Diluted EPS due to their anti-dilutive effect for the periods indicated (in thousands):

	Quarter Ended January 31,
	2013	2014
Shares underlying stock options and restricted stock units	5,223	3,412
0.25% Convertible Senior Notes due May 1, 2013	5,470	—
4.0% Convertible Senior Notes due March 15, 2015	14,615	9,198
0.875% Convertible Senior Notes due June 15, 2017	13,108	13,108
3.75% Convertible Senior Notes due October 15, 2018	17,355	17,355
4.0% Convertible Senior Notes due December 15, 2020	3,781	9,198
Total shares excluded due to anti-dilutive effect	59,552	52,271