AZN vs PFE: Correlation
How closely do AstraZeneca PLC (AZN) and Pfizer (PFE) trade together? Their weekly returns over three years give a correlation of 0.42, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AZN and PFE?
Over the past 3 years, AZN and PFE moved with a correlation of 0.42, which is moderate. The relationship has been stable: the 1-year correlation (0.47) sits close to the 3-year figure. Over 5 years the correlation is 0.43, and the annualized covariance of weekly returns is 249.2 %².
By 3-year correlation, PFE places #8 of the 14 assets tracked against AZN. Correlation aside, the last 12 months split them widely, with PFE ahead by 15.6 points (+4.0% versus +19.6%).
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.
AZN vs PFE: side by side
| AZN (AstraZeneca PLC) | PFE (Pfizer) | |
|---|---|---|
| 1-year return | +4.0% | +19.6% |
| 5-year return | +54.7% | -21.9% |
| Volatility (ann.) | 25.1% | 23.8% |
| Beta vs S&P 500 | 0.21 | 0.40 |
| Max drawdown (3Y) | -27.9% | -34.8% |
| Market cap | $255.2B | $159.7B |
| P/E (trailing) | 24.9 | 37.4 |
| Dividend yield | 1.94% | 6.08% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | AZN | PFE |
|---|---|---|
| 2022 | +19.2% | -10.4% |
| 2023 | +1.4% | -41.3% |
| 2024 | -0.6% | -2.2% |
| 2025 | +43.3% | +0.6% |
| 2026 | -9.6% | +18.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AZN and PFE good diversifiers for each other?
A fair diversifier. At 0.42, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between AZN and PFE?
As of 2026-08-27, the correlation of weekly returns between AZN and PFE is 0.42 over 3 years, 0.47 over 1 year and 0.43 over 5 years.
Is PFE a good diversifier for AZN?
A fair diversifier. At 0.42, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.42 mean?
A reading of 0.42 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/azn-vs-pfe.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/azn-vs-pfe/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AZN correlations · PFE correlations
