RBBN vs XLY: Correlation
Measured on weekly returns over the past three years, Ribbon Communications Inc. (RBBN) and Consumer Discretionary Select Sector SPDR Fund (XLY) carry a correlation of 0.51, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are RBBN and XLY?
Across a 3-year window, the weekly returns of RBBN and XLY correlate at 0.51, moderate. Recent behaviour matches the longer record: 0.55 over 1 year against 0.51 over 3. Stretching to 5 years gives 0.39, with an annualized covariance of 505.3 %².
XLY is one of the assets that tracks RBBN most closely: it ranks #1 out of the 11 assets we track against RBBN. Their recent paths diverged sharply: over the last 12 months XLY outperformed by 49.8 percentage points (-49.9% for RBBN against -0.1% for XLY). One caveat on sizing: RBBN is 2.6 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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 XLY: side by side
| RBBN (Ribbon Communications Inc.) | XLY (Consumer Discretionary Select Sector SPDR Fund) | |
|---|---|---|
| 1-year return | -49.9% | -0.1% |
| 5-year return | -69.7% | +31.8% |
| Volatility (ann.) | 50.8% | 19.7% |
| Beta vs S&P 500 | 1.67 | 1.15 |
| Max drawdown (3Y) | -62.1% | -26.0% |
| Market cap | $0.4B | – |
| P/E (trailing) | 25.0 | – |
| Dividend yield | 0.00% | 0.78% |
| Expense ratio | – | 0.08% |
| Assets under management | – | $22.5B |
| Sector / category | US Listed | Sector ETF |
XLY is a Consumer Cyclical fund from State Street Investment Management: $22.5B under management, 47 holdings, a 0.08% expense ratio, a 0.78% trailing dividend yield.
Year-by-year returns
| Year | RBBN | XLY |
|---|---|---|
| 2022 | -53.9% | -36.3% |
| 2023 | +3.9% | +39.6% |
| 2024 | +43.4% | +26.5% |
| 2025 | -30.8% | +7.4% |
| 2026 | -30.6% | -2.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are RBBN and XLY good diversifiers for each other?
To a limited degree. At 0.51 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between RBBN and XLY?
The RBBN/XLY correlation stands at 0.51 on a 3-year window (1 year: 0.55, 5 years: 0.39), computed from weekly returns as of 2026-08-27.
Is XLY a good diversifier for RBBN?
To a limited degree. At 0.51 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.51 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/rbbn-vs-xly.json
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Related comparisons
Hubs: RBBN correlations · XLY correlations
