BAND vs SPY: Correlation
How closely do Bandwidth Inc. (BAND) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.30, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BAND and SPY?
Over the past 3 years, BAND and SPY moved with a correlation of 0.30, which is moderate. Recent behaviour matches the longer record: 0.26 over 1 year against 0.30 over 3. Over 5 years the correlation is 0.38, and the annualized covariance of weekly returns is 398.3 %².
Out of 15 assets tracked against BAND, SPY lands near the bottom at #11. Their recent paths diverged sharply: over the last 12 months BAND outperformed by 228.6 percentage points (+249.2% for BAND against +20.6% for SPY). One caveat on sizing: BAND is 6.4 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.
BAND vs SPY: side by side
| BAND (Bandwidth Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +249.2% | +20.6% |
| 5-year return | -50.5% | +82.4% |
| Volatility (ann.) | 93.1% | 14.5% |
| Beta vs S&P 500 | 1.91 | 1.00 |
| Max drawdown (3Y) | -52.9% | -18.8% |
| Market cap | $1.7B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 1.01% |
| Expense ratio | – | 0.09% |
| Assets under management | – | $795.3B |
| Sector / category | US Listed | ETF · US Large Cap |
SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | BAND | SPY |
|---|---|---|
| 2022 | -68.0% | -18.2% |
| 2023 | -36.9% | +26.2% |
| 2024 | +17.6% | +24.9% |
| 2025 | -9.2% | +17.7% |
| 2026 | +235.6% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BAND and SPY good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.30 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between BAND and SPY?
The BAND/SPY correlation stands at 0.30 on a 3-year window (1 year: 0.26, 5 years: 0.38), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for BAND?
Yes, to a useful degree: a correlation of 0.30 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.30 mean?
On the −1 to +1 scale, 0.30 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.
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Related comparisons
Hubs: BAND correlations · SPY correlations
