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FAIR VALUE MEASUREMENTS
 6 Months Ended
May 03, 2025
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS
    As of the dates indicated, the following tables summarize the assets and liabilities that are recorded at fair value on a recurring basis (in thousands):
 May 3, 2025
 Level 1Level 2Level 3Total
Assets:    
Money market funds$584,853 $— $— $584,853 
Bond mutual fund115,236 — — 115,236 
Time deposits125,478 — — 125,478 
Deferred compensation plan assets18,003 — — 18,003 
U.S. government obligations— 273,024 — 273,024 
Corporate debt securities— 122,121 — 122,121 
Foreign currency forward contracts— 8,165 — 8,165 
Interest rate swaps— 2,421 — 2,421 
Total assets measured at fair value$843,570 $405,731 $— $1,249,301 
Liabilities:
Foreign currency forward contracts$— $5,054 $— $5,054 
Interest rate swaps— 44 — 44 
Total liabilities measured at fair value$— $5,098 $— $5,098 
November 2, 2024
Level 1Level 2Level 3Total
Assets:
Money market funds$636,097 $— $— $636,097 
Bond mutual fund112,703 — — 112,703 
Time deposits92,804 — — 92,804 
Deferred compensation plan assets16,519 — — 16,519 
U.S. government obligations— 286,181 — 286,181 
Corporate debt securities— 111,143 — 111,143 
Foreign currency forward contracts— 2,149 — 2,149 
Interest rate swaps— 11,777 — 11,777 
Total assets measured at fair value$858,123 $411,250 $— $1,269,373 
Liabilities:
Foreign currency forward contracts$— $9,155 $— $9,155 
Total liabilities measured at fair value$— $9,155 $— $9,155 

As of the dates indicated, the assets and liabilities above are presented on Ciena’s Condensed Consolidated Balance Sheets as follows (in thousands):
 May 3, 2025
 Level 1Level 2Level 3Total
Assets:    
Cash equivalents$822,388 $2,026 $— $824,414 
Short-term investments3,179 300,998 — 304,177 
Prepaid expenses and other— 8,165 — 8,165 
Long-term investments— 92,121 — 92,121 
Other long-term assets18,003 2,421 — 20,424 
Total assets measured at fair value$843,570 $405,731 $— $1,249,301 
Liabilities:
Accrued liabilities and other short-term obligations$— $5,054 $— $5,054 
Other long-term obligations— 44 — 44 
Total liabilities measured at fair value$— $5,098 $— $5,098 
 November 2, 2024
 Level 1Level 2Level 3Total
Assets:    
Cash equivalents$832,239 $9,426 $— $841,665 
Short-term investments9,365 306,978 — 316,343 
Prepaid expenses and other— 2,149 — 2,149 
Long-term investments— 80,920 — 80,920 
Other long-term assets16,519 11,777 — 28,296 
Total assets measured at fair value$858,123 $411,250 $— $1,269,373 
Liabilities:
Accrued liabilities and other short-term obligations$— $9,155 $— $9,155 
Total liabilities measured at fair value$— $9,155 $— $9,155 

Ciena did not have any transfers between Level 1 and Level 2 fair value measurements during the periods presented.