• Oct 5, 2026

  $389.69-0.42%

• Oct 2, 2026

  $391.34+3.22%

  The shares rose 3.22%, while the broad market, measured by the S&P 500 ETF (SPY), rose 0.74% the same session [2]. The move was larger than the broad-market gain. Seeking Alpha published a piece arguing that AI agents are changing the hardware mix and that networking wins [1].

  • 1Seeking Alpha
  • 2Broad market

• Oct 1, 2026

  $379.14+7.77%

  The S&P 500 ETF (SPY) rose only 0.18% in the same session, while the company rose 7.77%, so the move was not shared by the broad market [2]. 24/7 Wall St published a story on analyst calls on the stock and said peers barely moved [1].

  • 124/7 Wall St
  • 2Broad market

• Sep 30, 2026

  $351.82-0.87%

• Sep 29, 2026

  $354.92+3.12%

  The company rose 3.12% while the broad market, measured by the S&P 500 ETF (SPY), moved -0.18% [1]. The move was therefore not shared by the broad market [1].

  • 1Broad market

• Sep 28, 2026

  $344.19-3.56%

  The shares fell 3.56% while the S&P 500 ETF (SPY) moved -0.74% [1]. The broad market was also lower, but the company's decline was considerably larger than the market's [1].

  • 1Broad market

• Sep 25, 2026

  $356.91-0.42%

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

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