Ciena Corporation (CIEN) is currently at $443.72, up $54.03 or 13.86%

--Would be highest close since Aug. 17, 2026, when it closed at $445.18

--On pace for largest percent increase since Sept. 4, 2025, when it rose 23.31%

--Currently up three of the past four days

--Up 89.73% year-to-date

--Down 57.6% from its all-time closing high of $1046.50 on Oct. 20, 2000

--Up 192.92% from 52 weeks ago (Oct. 7, 2025), when it closed at $151.48

--Down 29.23% from its 52-week closing high of $627.00 on June 2, 2026

--Up 192.92% from its 52-week closing low of $151.48 on Oct. 7, 2025

--Traded as high as $444.02; highest intraday level since Aug. 17, 2026, when it hit $458.00

--Up 13.94% at today's intraday high; largest intraday percent increase since Aug. 12, 2026, when it rose as much as 15.18%

--Best performer in the S&P 500 today

All data as of 3:51:00 PM ET

Source: Dow Jones Market Data, FactSet