IBB vs IMUX: Correlation
How closely do iShares Biotechnology ETF (IBB) and Immunic, Inc. (IMUX) trade together? Their weekly returns over three years give a correlation of 0.40, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IBB and IMUX?
Across a 3-year window, the weekly returns of IBB and IMUX correlate at 0.40, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.05 versus 0.40 over 3 years. Stretching to 5 years gives 0.29, with an annualized covariance of 635.5 %².
Among the 168 assets we track against IBB, IMUX ranks #142 by 3-year correlation. Correlation aside, the last 12 months split them widely, with IMUX ahead by 35.2 points (+55.4% versus +90.6%). One caveat on sizing: IMUX is 3.7 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.
IBB vs IMUX: side by side
| IBB (iShares Biotechnology ETF) | IMUX (Immunic, Inc.) | |
|---|---|---|
| 1-year return | +55.4% | +90.6% |
| 5-year return | +26.6% | -83.6% |
| Volatility (ann.) | 20.7% | 76.2% |
| Beta vs S&P 500 | 0.81 | 1.04 |
| Max drawdown (3Y) | -24.9% | -73.8% |
| Market cap | – | $0.2B |
| P/E (trailing) | – | – |
| Dividend yield | 0.22% | 0.00% |
| Expense ratio | 0.44% | – |
| Assets under management | $9.2B | – |
| Sector / category | ETF · Thematic | US Listed |
IBB is a Health fund from iShares: $9.2B under management, 235 holdings, a 0.44% expense ratio, a 0.22% trailing dividend yield.
Year-by-year returns
| Year | IBB | IMUX |
|---|---|---|
| 2022 | -13.7% | -85.4% |
| 2023 | +3.8% | +7.1% |
| 2024 | -2.4% | -33.3% |
| 2025 | +28.0% | -46.6% |
| 2026 | +27.4% | +205.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IBB and IMUX good diversifiers for each other?
Reasonably. At 0.40, IBB and IMUX keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between IBB and IMUX?
The IBB/IMUX correlation stands at 0.40 on a 3-year window (1 year: 0.05, 5 years: 0.29), computed from weekly returns as of 2026-08-27.
Is IMUX a good diversifier for IBB?
Reasonably. At 0.40, IBB and IMUX keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.40 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/ibb-vs-imux.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/ibb-vs-imux/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IBB correlations · IMUX correlations
