CMPX vs IBB: Correlation
How closely do Compass Therapeutics, Inc. (CMPX) and iShares Biotechnology ETF (IBB) trade together? Their weekly returns over three years give a correlation of 0.44, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CMPX and IBB?
Over the past 3 years, CMPX and IBB moved with a correlation of 0.44, which is moderate. Recent behaviour matches the longer record: 0.35 over 1 year against 0.44 over 3. Over 5 years the correlation is 0.36, and the annualized covariance of weekly returns is 780.9 %².
In CMPX's tracked universe of 10 assets, IBB sits right near the top at #3. Their recent paths diverged sharply: over the last 12 months IBB outperformed by 78.6 percentage points (-23.2% for CMPX against +55.4% for IBB). Risk is not evenly split, since CMPX carries 4.1 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.
CMPX vs IBB: side by side
| CMPX (Compass Therapeutics, Inc.) | IBB (iShares Biotechnology ETF) | |
|---|---|---|
| 1-year return | -23.2% | +55.4% |
| 5-year return | -37.8% | +26.6% |
| Volatility (ann.) | 85.8% | 20.7% |
| Beta vs S&P 500 | 1.92 | 0.81 |
| Max drawdown (3Y) | -75.0% | -24.9% |
| Market cap | $0.5B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.22% |
| Expense ratio | – | 0.44% |
| Assets under management | – | $9.2B |
| Sector / category | US Listed | ETF · Thematic |
IBB, iShares's Health fund, carries $9.2B under management, 235 holdings, a 0.44% expense ratio, a 0.22% trailing dividend yield.
Year-by-year returns
| Year | CMPX | IBB |
|---|---|---|
| 2022 | +58.7% | -13.7% |
| 2023 | -69.0% | +3.8% |
| 2024 | -7.1% | -2.4% |
| 2025 | +270.3% | +28.0% |
| 2026 | -53.1% | +27.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CMPX and IBB good diversifiers for each other?
A fair diversifier. At 0.44, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between CMPX and IBB?
Using weekly returns as of 2026-08-27: 0.44 over 3 years, with 0.35 over the last year and 0.36 over 5 years.
Is IBB a good diversifier for CMPX?
A fair diversifier. At 0.44, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.44 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/cmpx-vs-ibb.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/cmpx-vs-ibb/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CMPX correlations · IBB correlations
