FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Jul. 31, 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):



	July 31, 2017
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	392,351	$	—	$	—	$	392,351
U.S. government obligations	—		284,634		—		284,634
Commercial paper	—		89,887		—		89,887
Foreign currency forward contracts	—		1,811		—		1,811
Total assets measured at fair value	$	392,351	$	376,332	$	—	$	768,683

Liabilities:
Foreign currency forward contracts	$	—	$	229	$	—	$	229
Forward starting interest rate swap	—		1,396		—		1,396
Total liabilities measured at fair value	$	—	$	1,625	$	—	$	1,625



	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):



	July 31, 2017
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	392,351	$	79,904	$	—	$	472,255
Short-term investments	—		234,743		—		234,743
Prepaid expenses and other	—		1,811		—		1,811
Long-term investments	—		59,874		—		59,874
Total assets measured at fair value	$	392,351	$	376,332	$	—	$	768,683

Liabilities:
Accrued liabilities	$	—	$	229	$	—	$	229
Other long-term obligations	—		1,396		—		1,396
Total liabilities measured at fair value	$	—	$	1,625	$	—	$	1,625



	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