FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Apr. 30, 2017

Summary of the fair value of assets and liabilities recorded on a recurring basis

As of the date indicated, the following table summarizes the assets and liabilities that are recorded at fair value on a recurring basis (in thousands):



	April 30, 2017
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	474,476	$	—	$	—	$	474,476
U.S. government obligations	—		344,661		—		344,661
Commercial paper	—		79,917		—		79,917
Foreign currency forward contracts	—		827		—		827
Total assets measured at fair value	$	474,476	$	425,405	$	—	$	899,881

Liabilities:
Foreign currency forward contracts	$	—	$	1,811	$	—	$	1,811
Forward starting interest rate swap	—		1,070		—		1,070
Total liabilities measured at fair value	$	—	$	2,881	$	—	$	2,881



	October 31, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	625,277	$	—	$	—	$	625,277
U.S. government obligations	—		350,431		—		350,431
Commercial paper	—		69,959		—		69,959
Foreign currency forward contracts	—		175		—		175
Total assets measured at fair value	$	625,277	$	420,565	$	—	$	1,045,842

Liabilities:
Foreign currency forward contracts	$	—	$	1,396	$	—	$	1,396
Forward starting interest rate swap	—		5,967		—		5,967
Total liabilities measured at fair value	$	—	$	7,363	$	—	$	7,363

Assets and liabilities as presented on Ciena's Condensed Consolidated Balance Sheets

As of the date indicated, the assets and liabilities above are presented on Ciena’s Condensed Consolidated Balance Sheet as follows (in thousands):



	April 30, 2017
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	474,476	$	59,947	$	—	$	534,423
Short-term investments	—		274,779		—		274,779
Prepaid expenses and other	—		827		—		827
Long-term investments	—		89,852		—		89,852
Total assets measured at fair value	$	474,476	$	425,405	$	—	$	899,881

Liabilities:
Accrued liabilities	$	—	$	1,811	$	—	$	1,811
Other long-term obligations	—		1,070		—		1,070
Total liabilities measured at fair value	$	—	$	2,881	$	—	$	2,881



	October 31, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	625,277	$	54,970	$	—	$	680,247
Short-term investments	—		275,248		—		275,248
Prepaid expenses and other	—		175		—		175
Long-term investments	—		90,172		—		90,172
Total assets measured at fair value	$	625,277	$	420,565	$	—	$	1,045,842

Liabilities:
Accrued liabilities	$	—	$	1,396	$	—	$	1,396
Other long-term obligations	—		5,967		—		5,967
Total liabilities measured at fair value	$	—	$	7,363	$	—	$	7,363