RBBN vs VT: Correlation
How closely do Ribbon Communications Inc. (RBBN) and Vanguard Total World Stock ETF (VT) trade together? Their weekly returns over three years give a correlation of 0.49, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are RBBN and VT?
Over the past 3 years, RBBN and VT 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 0.42, and the annualized covariance of weekly returns is 343.7 %².
By 3-year correlation, VT places #5 of the 11 assets tracked against RBBN. The last year tells two different stories: VT led by 72.6 percentage points, -49.9% for RBBN against +22.7% for VT. Risk is not evenly split, since RBBN carries 3.7 times the volatility of the other side.
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.
RBBN vs VT: side by side
| RBBN (Ribbon Communications Inc.) | VT (Vanguard Total World Stock ETF) | |
|---|---|---|
| 1-year return | -49.9% | +22.7% |
| 5-year return | -69.7% | +67.7% |
| Volatility (ann.) | 50.8% | 13.9% |
| Beta vs S&P 500 | 1.67 | 0.92 |
| Max drawdown (3Y) | -62.1% | -16.5% |
| Market cap | $0.4B | – |
| P/E (trailing) | 25.0 | – |
| Dividend yield | 0.00% | 1.59% |
| Expense ratio | – | 0.06% |
| Assets under management | – | $97.9B |
| Sector / category | US Listed | ETF · Global |
VT is a Global Large-Stock Blend fund from Vanguard: $97.9B under management, 5308 holdings, a 0.06% expense ratio, a 1.59% trailing dividend yield.
Year-by-year returns
| Year | RBBN | VT |
|---|---|---|
| 2022 | -53.9% | -18.0% |
| 2023 | +3.9% | +22.0% |
| 2024 | +43.4% | +16.5% |
| 2025 | -30.8% | +22.4% |
| 2026 | -30.6% | +15.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are RBBN and VT good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.49 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between RBBN and VT?
Using weekly returns as of 2026-08-27: 0.49 over 3 years, with 0.50 over the last year and 0.42 over 5 years.
Is VT a good diversifier for RBBN?
Yes, to a useful degree: a correlation of 0.49 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.49 mean?
A reading of 0.49 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/rbbn-vs-vt.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/rbbn-vs-vt/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: RBBN correlations · VT correlations
