How Will Ciena Stock React To Its Upcoming Earnings?

September 2nd, 2026 by Trefis Team
CIEN: Ciena logo
CIEN
Ciena

Ciena (NYSE:CIEN) is set to report its earnings on Thursday, September 3, 2026. The company has $50 billion in current market capitalization. Revenue over the last twelve months was $5.6 billion, and it was operationally profitable with $624 million in operating profits and net income of $438 million. While the post-earnings stock reaction will depend on how the results and outlook stack up against investor expectations, a detailed look at historical results can aid you if you are an event-driven trader.

Here is how: either understand the historical odds and position yourself prior to the earnings announcement, or look at the correlation between immediate and medium-term returns post earnings and enter a trade one day after the announcement.

See earnings reaction history of all stocks

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Image by Bethany Drouin from Pixabay

Ciena’s Historical Odds Of Positive Post-Earnings Return

Some observations on one-day (1D) post-earnings returns:

  • There are 20 earnings data points recorded over the last five years, with 11 positive and 9 negative one-day (1D) returns observed. In summary, positive 1D returns were seen about 55% of the time.
  • However, this percentage decreases to 45% if we consider data for the last 3 years instead of 5.
  • Median of the 11 positive returns = 9.2%, and median of the 9 negative returns = -11%

Additional data for observed 5-Day (5D) and 21-Day (21D) returns post earnings are summarized along with the statistics in the table below.

Forward Returns
Earnings Date 1D 5D 21D
6/4/2026 -13.7% -29.9% -30.1%
3/5/2026 -12.9% -1.0% 30.3%
12/11/2025 9.2% -8.1% 5.6%
9/4/2025 23.3% 37.0% 61.0%
6/5/2025 -12.9% -13.9% -6.2%
3/11/2025 -2.4% 0.2% -17.5%
12/12/2024 15.4% 14.6% 14.0%
9/4/2024 -0.8% -4.6% 19.3%
6/6/2024 0.7% 1.1% -0.3%
3/7/2024 -14.7% -16.8% -23.2%
12/7/2023 1.2% -3.1% 3.6%
8/31/2023 15.8% 11.5% 9.5%
6/6/2023 -10.8% -12.5% -10.8%
3/6/2023 3.7% 0.9% 6.5%
12/8/2022 20.0% 17.4% 20.1%
9/1/2022 -10.4% -13.5% -20.3%
6/2/2022 -1.3% -5.6% -11.1%
2/15/2022 7.4% 7.9% -9.3%
12/9/2021 15.6% 19.8% 17.4%
9/2/2021 2.9% -2.4% -8.2%
SUMMARY STATS
# Positive 11 9 10
# Negative 9 11 10
Median Positive 9.2% 11.5% 15.7%
Median Negative -10.8% -8.1% -10.9%
Max Positive 23.3% 37.0% 61.0%
Max Negative -14.7% -29.9% -30.1%

Correlation Between 1D, 5D and 21D Historical Returns

A relatively less risky strategy (though not useful if the correlation is low) is to understand the correlation between short-term and medium-term returns post earnings, find a pair that has the highest correlation, and execute the appropriate trade. For example, 1D_5D shows the strongest correlation here: if the 1D post-earnings return is positive, a trader can position themselves in the same direction over the following 5D window. Here is some correlation data based on a 5-year and a 3-year (more recent) history. Note that these correlations are between subsequent windows, not the cumulative columns above: 1D_5D is the correlation between the 1D post-earnings return and the subsequent return from day 1 through day 5, 1D_21D is between the 1D return and the subsequent return from day 1 through day 21, and 5D_21D is between the 5D return and the subsequent return from day 5 through day 21.

History 1D_5D 1D_21D 5D_21D
5Y History 14.8% 10.3% 11.2%
3Y History 28.0% 22.0% 34.5%

Is There Any Correlation With Peer Earnings?

Sometimes, peer performance can have an influence on post-earnings stock reaction. Some of that pricing-in may even begin before the earnings are announced. Here is some historical data on the past post-earnings performance of Ciena stock compared with the stock performance of peers that reported earnings just before Ciena. For fair comparison, peer stock returns also represent post-earnings one-day (1D) returns.

1D Return Peer Post-Earnings 1D Return
CIEN Earnings Dates CIEN CSCO ANET
6/4/2026 -13.7% 13.4% N/A*
3/5/2026 -12.9% -12.3% 4.8%
12/11/2025 9.2% 4.6% N/A*
9/4/2025 23.3% -1.6% N/A*
6/5/2025 -12.9% 4.8% N/A*
3/11/2025 -2.4% 2.1% -6.4%
12/12/2024 15.4% -2.1% N/A*
9/4/2024 -0.8% 6.8% N/A*
6/6/2024 0.7% -2.7% N/A*
3/7/2024 -14.7% -2.4% -5.5%
12/7/2023 1.2% -9.8% N/A*
8/31/2023 15.8% 3.3% N/A*
6/6/2023 -10.8% 1.2% N/A*
3/6/2023 3.7% 5.2% 4.0%
12/8/2022 20.0% 5.0% N/A*
9/1/2022 -10.4% 5.8% N/A*
6/2/2022 -1.3% -13.7% N/A*
2/15/2022 7.4% N/A* 5.8%
12/9/2021 15.6% -5.5% N/A*
9/2/2021 2.9% 3.8% N/A*
CORRELATION -4.5% 43.6%

* N/A indicates no comparable post-earnings session for that peer in that quarter

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