IBB vs PFE: Correlation
iShares Biotechnology ETF (IBB) and Pfizer (PFE) show a moderate relationship: their 3-year correlation of weekly returns is 0.52.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IBB and PFE?
Across a 3-year window, the weekly returns of IBB and PFE correlate at 0.52, moderate. The relationship has been stable: the 1-year correlation (0.45) sits close to the 3-year figure. Stretching to 5 years gives 0.52, with an annualized covariance of 258.1 %².
Within IBB's tracked universe of 168 assets, PFE comes in at #83 by 3-year correlation. Correlation aside, the last 12 months split them widely, with IBB ahead by 35.8 points (+55.4% versus +19.6%). The rolling one-year correlation moved between 0.29 and 0.71 over the past three years, a moderate range.
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 PFE: side by side
| IBB (iShares Biotechnology ETF) | PFE (Pfizer) | |
|---|---|---|
| 1-year return | +55.4% | +19.6% |
| 5-year return | +26.6% | -21.9% |
| Volatility (ann.) | 20.7% | 23.8% |
| Beta vs S&P 500 | 0.81 | 0.40 |
| Max drawdown (3Y) | -24.9% | -34.8% |
| Market cap | – | $159.7B |
| P/E (trailing) | – | 37.4 |
| Dividend yield | 0.22% | 6.08% |
| Expense ratio | 0.44% | – |
| Assets under management | $9.2B | – |
| Sector / category | ETF · Thematic | Health Care |
On the fund side, IBB sits in the Health category at iShares, with $9.2B under management, 235 holdings, a 0.44% expense ratio, a 0.22% trailing dividend yield.
Year-by-year returns
| Year | IBB | PFE |
|---|---|---|
| 2022 | -13.7% | -10.4% |
| 2023 | +3.8% | -41.3% |
| 2024 | -2.4% | -2.2% |
| 2025 | +28.0% | +0.6% |
| 2026 | +27.4% | +18.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IBB and PFE good diversifiers for each other?
Only partially. A correlation of 0.52 means IBB and PFE share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between IBB and PFE?
The IBB/PFE correlation stands at 0.52 on a 3-year window (1 year: 0.45, 5 years: 0.52), computed from weekly returns as of 2026-08-27.
Is PFE a good diversifier for IBB?
Only partially. A correlation of 0.52 means IBB and PFE share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.52 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-pfe.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/ibb-vs-pfe/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IBB correlations · PFE correlations
