AURA vs XBI: Correlation
Aura Biosciences, Inc. (AURA) and SPDR S&P Biotech ETF (XBI) show a strong relationship: their 3-year correlation of weekly returns is 0.61.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AURA and XBI?
On 3 years of weekly data the AURA/XBI correlation comes out at 0.61, strong. The relationship has been stable: the 1-year correlation (0.54) sits close to the 3-year figure. The 5-year figure is 0.48, and annualized covariance runs at 1190.2 %².
Few assets follow AURA as closely as XBI, which ranks #1 of 18 tracked partners. The last year tells two different stories: XBI led by 67.6 percentage points, +19.6% for AURA against +87.2% for XBI. Note the risk asymmetry: AURA runs 2.5 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.
AURA vs XBI: side by side
| AURA (Aura Biosciences, Inc.) | XBI (SPDR S&P Biotech ETF) | |
|---|---|---|
| 1-year return | +19.6% | +87.2% |
| 5-year return | -48.0% | +28.6% |
| Volatility (ann.) | 70.5% | 27.7% |
| Beta vs S&P 500 | 2.01 | 1.09 |
| Max drawdown (3Y) | -59.1% | -33.0% |
| Market cap | $0.8B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | – |
| Sector / category | US Listed | ETF · Thematic |
Year-by-year returns
| Year | AURA | XBI |
|---|---|---|
| 2022 | -38.2% | -25.9% |
| 2023 | -15.6% | +7.6% |
| 2024 | -7.2% | +1.0% |
| 2025 | -33.7% | +35.9% |
| 2026 | +41.3% | +38.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AURA and XBI good diversifiers for each other?
Somewhat, no more. With 0.61 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between AURA and XBI?
The AURA/XBI correlation stands at 0.61 on a 3-year window (1 year: 0.54, 5 years: 0.48), computed from weekly returns as of 2026-08-27.
Is XBI a good diversifier for AURA?
Somewhat, no more. With 0.61 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.61 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/aura-vs-xbi.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/aura-vs-xbi/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AURA correlations · XBI correlations
