IBB vs IDYA: Correlation
iShares Biotechnology ETF (IBB) and IDEAYA Biosciences, Inc. (IDYA) show a strong relationship: their 3-year correlation of weekly returns is 0.73.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IBB and IDYA?
Across a 3-year window, the weekly returns of IBB and IDYA correlate at 0.73, strong. Little has changed lately, as the 1-year reading of 0.71 lands near the 3-year figure. Stretching to 5 years gives 0.52, with an annualized covariance of 681.8 %².
Within IBB's tracked universe of 168 assets, IDYA comes in at #7 by 3-year correlation. On 12-month performance IDYA holds a 11.7-point edge, +55.4% against +67.1%. Risk is not evenly split, since IDYA carries 2.2 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.
IBB vs IDYA: side by side
| IBB (iShares Biotechnology ETF) | IDYA (IDEAYA Biosciences, Inc.) | |
|---|---|---|
| 1-year return | +55.4% | +67.1% |
| 5-year return | +26.6% | +82.5% |
| Volatility (ann.) | 20.7% | 45.3% |
| Beta vs S&P 500 | 0.81 | 1.37 |
| Max drawdown (3Y) | -24.9% | -69.2% |
| Market cap | – | $4.0B |
| 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 | IDYA |
|---|---|---|
| 2022 | -13.7% | -23.1% |
| 2023 | +3.8% | +95.8% |
| 2024 | -2.4% | -27.8% |
| 2025 | +28.0% | +34.5% |
| 2026 | +27.4% | +20.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
A structural note: 0.24% of IBB is IDYA itself, so the fund partly moves with the stock by construction.
Are IBB and IDYA good diversifiers for each other?
To a limited degree. At 0.73 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 IBB and IDYA?
Using weekly returns as of 2026-08-27: 0.73 over 3 years, with 0.71 over the last year and 0.52 over 5 years.
Is IDYA a good diversifier for IBB?
To a limited degree. At 0.73 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 0.73 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-idya.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/ibb-vs-idya/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IBB correlations · IDYA correlations
