• Oct 26, 2026

  $335.93+4.89%

  The stock rose 4.89%, while the broad market, measured by the S&P 500 ETF, rose 0.71% the same session [1]. The move was much larger than the broad-market move, so it was not mainly shared by the market [1].

  • 1Broad market

• Oct 23, 2026

  $320.26-0.74%

• Oct 22, 2026

  $322.64-10.71%

  The shares closed down 10.71%, a much larger fall than the broad market's. The S&P 500 ETF (SPY) moved -1.18% in the same session [1]. The move was therefore not shared to the same degree by the broad market, and the items hold no company-specific report explaining it.

  • 1Broad market

• Oct 21, 2026

  $361.34+5.67%

  The shares rose 5.67% while the S&P 500 ETF (SPY) moved +0.53% the same session [1]. The gain was much larger than the broad-market move, so it was not matched by the wider market [1].

  • 1Broad market

• Oct 20, 2026

  $341.95-0.65%

• Oct 19, 2026

  $344.20+3.45%

  The stock rose 3.45%, while the broad market, measured by the S&P 500 ETF (SPY), rose 0.42% on the same session [1]. The move was therefore much larger than the broad-market gain and was not shared by the market to that degree [1].

  • 1Broad market

• Oct 16, 2026

  $332.73-6.67%

  The shares fell 6.67% while the S&P 500 ETF (SPY) fell 1.11% on the same session [1]. The broad market also declined, but the company's drop was far larger than the market's, so most of the move was not shared by the broad market [1].

  • 1Broad market

Closing prices for CIEN. Summaries describe past sessions only and are not advice, a forecast or a recommendation.

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