PFE vs REGN: Correlation
Measured on weekly returns over the past three years, Pfizer (PFE) and Regeneron Pharmaceuticals (REGN) carry a correlation of 0.39, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PFE and REGN?
On 3 years of weekly data the PFE/REGN correlation comes out at 0.39, moderate. Little has changed lately, as the 1-year reading of 0.31 lands near the 3-year figure. The 5-year figure is 0.35, and annualized covariance runs at 295.5 %².
By 3-year correlation, REGN places #18 of the 32 assets tracked against PFE. Correlation aside, the last 12 months split them widely, with REGN ahead by 18.7 points (+19.6% versus +38.3%). On a rolling one-year basis the correlation drifted between 0.22 and 0.57, a moderate band.
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.
PFE vs REGN: side by side
| PFE (Pfizer) | REGN (Regeneron Pharmaceuticals) | |
|---|---|---|
| 1-year return | +19.6% | +38.3% |
| 5-year return | -21.9% | +20.4% |
| Volatility (ann.) | 23.8% | 31.8% |
| Beta vs S&P 500 | 0.40 | 0.61 |
| Max drawdown (3Y) | -34.8% | -59.7% |
| Market cap | $159.7B | $83.2B |
| P/E (trailing) | 37.4 | 20.2 |
| Dividend yield | 6.08% | 0.45% |
| Sector / category | Health Care | Health Care |
Year-by-year returns
| Year | PFE | REGN |
|---|---|---|
| 2022 | -10.4% | +14.2% |
| 2023 | -41.3% | +21.7% |
| 2024 | -2.2% | -18.9% |
| 2025 | +0.6% | +9.0% |
| 2026 | +18.3% | +5.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PFE and REGN good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.39 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between PFE and REGN?
The PFE/REGN correlation stands at 0.39 on a 3-year window (1 year: 0.31, 5 years: 0.35), computed from weekly returns as of 2026-08-27.
Is REGN a good diversifier for PFE?
Yes, to a useful degree: a correlation of 0.39 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.39 mean?
A reading of 0.39 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/pfe-vs-regn.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/pfe-vs-regn/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: PFE correlations · REGN correlations
