Earnings (Loss) Per Share Calculation (Tables)

3 Months Ended

Jan. 31, 2015

Reconciliation of numerator and denominator of Basic and Diluted Earnings Per Share

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. If the numerator reflected net income, Diluted EPS would also include, to the extent the effect is not anti-dilutive, the following: (i) shares issuable upon vesting of restricted stock units, (ii) shares issuable under Ciena's employee stock purchase plan and upon exercise of outstanding stock options, using the treasury stock method; and (iii) shares underlying Ciena's outstanding convertible notes.



	Quarter Ended January 31,
Numerator	2014			2015
Net loss	$	(15,936	)	$	(18,779	)



	Quarter Ended January 31,
Denominator	2014	2015
Basic weighted average shares outstanding	104,501	107,773
Dilutive weighted average shares outstanding	104,501	107,773



	Quarter Ended January 31,
EPS	2014			2015
Basic EPS	$	(0.15	)	$	(0.17	)
Diluted EPS	$	(0.15	)	$	(0.17	)

Weighted average shares excluded from calculation of denominator for Basic and Diluted EPS

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,
	2014	2015
Shares underlying stock options and restricted stock units	3,412	3,899
4.0% Convertible Senior Notes due March 15, 2015	9,198	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	9,198	9,198
Total shares excluded due to anti-dilutive effect	52,271	52,758