CIEN vs SOXX: Correlation
How closely do Ciena (CIEN) and iShares Semiconductor ETF (SOXX) trade together? Their weekly returns over three years give a correlation of 0.48, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CIEN and SOXX?
On 3 years of weekly data the CIEN/SOXX correlation comes out at 0.48, moderate. The relationship has been stable: the 1-year correlation (0.38) sits close to the 3-year figure. The 5-year figure is 0.49, and annualized covariance runs at 845.3 %².
By 3-year correlation, SOXX places #15 of the 28 assets tracked against CIEN. The last year tells two different stories: CIEN led by 221.2 percentage points, +331.2% for CIEN against +110.0% for SOXX. Across three years, the rolling one-year figure varied moderately, from 0.22 to 0.66.
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 SOXX: side by side
| CIEN (Ciena) | SOXX (iShares Semiconductor ETF) | |
|---|---|---|
| 1-year return | +331.2% | +110.0% |
| 5-year return | +598.5% | +247.5% |
| Volatility (ann.) | 50.1% | 35.2% |
| Beta vs S&P 500 | 1.59 | 1.93 |
| Max drawdown (3Y) | -47.3% | -41.4% |
| Market cap | $56.6B | – |
| P/E (trailing) | 133.7 | – |
| Dividend yield | 0.00% | 0.29% |
| Expense ratio | – | 0.33% |
| Assets under management | – | $44.7B |
| Sector / category | Information Technology | ETF · Thematic |
On the fund side, SOXX sits in the Technology category at iShares, with $44.7B under management, 30 holdings, a 0.33% expense ratio, a 0.29% trailing dividend yield.
Year-by-year returns
| Year | CIEN | SOXX |
|---|---|---|
| 2022 | -33.8% | -35.1% |
| 2023 | -11.7% | +67.1% |
| 2024 | +88.4% | +12.9% |
| 2025 | +175.8% | +40.7% |
| 2026 | +71.0% | +74.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CIEN and SOXX good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.48 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between CIEN and SOXX?
The CIEN/SOXX correlation stands at 0.48 on a 3-year window (1 year: 0.38, 5 years: 0.49), computed from weekly returns as of 2026-08-27.
Is SOXX a good diversifier for CIEN?
Yes, to a useful degree: a correlation of 0.48 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.48 mean?
On the −1 to +1 scale, 0.48 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-soxx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/cien-vs-soxx/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: CIEN correlations · SOXX correlations
