Ciena Rejoins S&P 500 After Seventeen Years
Networking hardware maker Ciena will rejoin the S&P 500, returning to the benchmark on Wednesday after being removed in 2009, S&P Dow Jones Indices said. The company, whose market cap nearly tripled over the past year, replaces Dayforce following its $12.3 billion acquisition; about 18% of fiscal 2025 revenue came from an unnamed cloud provider and 11% from AT&T. Inclusion reflects rising demand for data-center infrastructure tied to generative AI and supports Ciena's forecasted ~24% fiscal 2026 revenue growth.
Key Points
- 1Returns to S&P 500, replacing Dayforce per S&P Dow Jones Indices announcement
- 2Benefits from a nearly tripled market cap and strong demand for data-center infrastructure
- 3May prompt index-driven inflows as fund managers buy shares to match S&P allocations
Scoring Rationale
Moderate market impact and official confirmation, but limited technical novelty and primarily financial, index-driven implications for investors.
Sources
Public references used for this report.
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