ACWI vs RBBN: Correlation
Measured on weekly returns over the past three years, iShares MSCI ACWI ETF (ACWI) and Ribbon Communications Inc. (RBBN) carry a correlation of 0.49, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACWI and RBBN?
Over the past 3 years, ACWI and RBBN moved with a correlation of 0.49, which is moderate. Little has changed lately, as the 1-year reading of 0.50 lands near the 3-year figure. Over 5 years the correlation is 0.41, and the annualized covariance of weekly returns is 340.8 %².
Among the 119 assets we track against ACWI, RBBN ranks #96 by 3-year correlation. The last year tells two different stories: ACWI led by 72.6 percentage points, +22.7% for ACWI against -49.9% for RBBN. Note the risk asymmetry: RBBN runs 3.7 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.
ACWI vs RBBN: side by side
| ACWI (iShares MSCI ACWI ETF) | RBBN (Ribbon Communications Inc.) | |
|---|---|---|
| 1-year return | +22.7% | -49.9% |
| 5-year return | +69.0% | -69.7% |
| Volatility (ann.) | 13.8% | 50.8% |
| Beta vs S&P 500 | 0.92 | 1.67 |
| Max drawdown (3Y) | -16.5% | -62.1% |
| Market cap | – | $0.4B |
| P/E (trailing) | – | 25.0 |
| Dividend yield | 1.44% | 0.00% |
| Expense ratio | 0.32% | – |
| Assets under management | $32.5B | – |
| Sector / category | ETF · Global | US Listed |
On the fund side, ACWI sits in the Global Large-Stock Blend category at iShares, with $32.5B under management, 1590 holdings, a 0.32% expense ratio, a 1.44% trailing dividend yield.
Year-by-year returns
| Year | ACWI | RBBN |
|---|---|---|
| 2022 | -18.4% | -53.9% |
| 2023 | +22.3% | +3.9% |
| 2024 | +17.4% | +43.4% |
| 2025 | +22.4% | -30.8% |
| 2026 | +14.9% | -30.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACWI and RBBN good diversifiers for each other?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ACWI and RBBN?
As of 2026-08-27, the correlation of weekly returns between ACWI and RBBN is 0.49 over 3 years, 0.50 over 1 year and 0.41 over 5 years.
Is RBBN a good diversifier for ACWI?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.49 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/acwi-vs-rbbn.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/acwi-vs-rbbn/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: ACWI correlations · RBBN correlations
