CSCO vs VOO: Correlation
How closely do Cisco (CSCO) and Vanguard S&P 500 ETF (VOO) trade together? Their weekly returns over three years give a correlation of 0.46, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CSCO and VOO?
Over the past 3 years, CSCO and VOO moved with a correlation of 0.46, which is moderate. The link has loosened recently: the 1-year correlation (0.29) runs below the 3-year figure (0.46). Over 5 years the correlation is 0.52, and the annualized covariance of weekly returns is 173.3 %².
Within CSCO's tracked universe of 30 assets, VOO comes in at #6 by 3-year correlation. Correlation aside, the last 12 months split them widely, with CSCO ahead by 46.7 points (+67.3% versus +20.6%). The relationship is regime-dependent: the rolling one-year correlation swung between 0.22 and 0.83 over the past three years, so this pair behaves very differently depending on the market environment. Note the risk asymmetry: CSCO runs 1.8 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
CSCO vs VOO: side by side
| CSCO (Cisco) | VOO (Vanguard S&P 500 ETF) | |
|---|---|---|
| 1-year return | +67.3% | +20.6% |
| 5-year return | +118.1% | +83.0% |
| Volatility (ann.) | 26.4% | 14.4% |
| Beta vs S&P 500 | 0.84 | 0.99 |
| Max drawdown (3Y) | -20.2% | -18.7% |
| Market cap | $442.0B | – |
| P/E (trailing) | 33.8 | – |
| Dividend yield | 1.48% | 1.07% |
| Expense ratio | – | 0.03% |
| Assets under management | – | $1,686.9B |
| Sector / category | Information Technology | ETF · US Large Cap |
VOO, Vanguard's Large Blend fund, carries $1,686.9B under management, 503 holdings, a 0.03% expense ratio, a 1.07% trailing dividend yield.
Year-by-year returns
| Year | CSCO | VOO |
|---|---|---|
| 2022 | -22.5% | -18.2% |
| 2023 | +9.3% | +26.3% |
| 2024 | +21.0% | +25.0% |
| 2025 | +33.5% | +17.8% |
| 2026 | +47.7% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
Keep in mind that VOO holds CSCO at a 0.71% weight, which makes a slice of this correlation mechanical rather than coincidental.
Are CSCO and VOO good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.46 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between CSCO and VOO?
As of 2026-08-27, the correlation of weekly returns between CSCO and VOO is 0.46 over 3 years, 0.29 over 1 year and 0.52 over 5 years.
Is VOO a good diversifier for CSCO?
Yes, to a useful degree: a correlation of 0.46 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.46 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/csco-vs-voo.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/csco-vs-voo/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: CSCO correlations · VOO correlations
