CIEN vs VRT: Correlation
Ciena (CIEN) and Vertiv (VRT) show a moderate relationship: their 3-year correlation of weekly returns is 0.50.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CIEN and VRT?
Over the past 3 years, CIEN and VRT moved with a correlation of 0.50, which is moderate. Little has changed lately, as the 1-year reading of 0.40 lands near the 3-year figure. Over 5 years the correlation is 0.41, and the annualized covariance of weekly returns is 1441.5 %².
Within CIEN's tracked universe of 28 assets, VRT comes in at #11 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months CIEN outperformed by 222.7 percentage points (+331.2% for CIEN against +108.5% for VRT). The relationship is regime-dependent: the rolling one-year correlation swung between 0.13 and 0.66 over the past three years, so this pair behaves very differently depending on the market environment.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
CIEN vs VRT: side by side
| CIEN (Ciena) | VRT (Vertiv) | |
|---|---|---|
| 1-year return | +331.2% | +108.5% |
| 5-year return | +598.5% | +847.7% |
| Volatility (ann.) | 50.1% | 57.1% |
| Beta vs S&P 500 | 1.59 | 2.36 |
| Max drawdown (3Y) | -47.3% | -61.3% |
| Market cap | $56.6B | $103.7B |
| P/E (trailing) | 133.7 | 59.6 |
| Dividend yield | 0.00% | 0.07% |
| Sector / category | Information Technology | Industrials |
Year-by-year returns
| Year | CIEN | VRT |
|---|---|---|
| 2022 | -33.8% | -45.3% |
| 2023 | -11.7% | +251.8% |
| 2024 | +88.4% | +136.8% |
| 2025 | +175.8% | +42.8% |
| 2026 | +71.0% | +66.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CIEN and VRT good diversifiers for each other?
Only partially. A correlation of 0.50 means CIEN and VRT share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between CIEN and VRT?
Using weekly returns as of 2026-08-27: 0.50 over 3 years, with 0.40 over the last year and 0.41 over 5 years.
Is VRT a good diversifier for CIEN?
Only partially. A correlation of 0.50 means CIEN and VRT share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.50 mean?
On the −1 to +1 scale, 0.50 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/cien-vs-vrt.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/cien-vs-vrt/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: CIEN correlations · VRT correlations
