PFE vs TMO: Correlation
How closely do Pfizer (PFE) and Thermo Fisher Scientific (TMO) trade together? Their weekly returns over three years give a correlation of 0.45, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PFE and TMO?
Over the past 3 years, PFE and TMO moved with a correlation of 0.45, which is moderate. Recent behaviour matches the longer record: 0.46 over 1 year against 0.45 over 3. Over 5 years the correlation is 0.43, and the annualized covariance of weekly returns is 318.7 %².
By 3-year correlation, TMO places #10 of the 32 assets tracked against PFE. The trailing year gives TMO the advantage: +19.6% versus +29.7%, a 10.1-point spread. Do not treat this figure as fixed: across three years the rolling one-year correlation ranged all the way from 0.15 to 0.72.
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 TMO: side by side
| PFE (Pfizer) | TMO (Thermo Fisher Scientific) | |
|---|---|---|
| 1-year return | +19.6% | +29.7% |
| 5-year return | -21.9% | +14.5% |
| Volatility (ann.) | 23.8% | 29.4% |
| Beta vs S&P 500 | 0.40 | 0.74 |
| Max drawdown (3Y) | -34.8% | -37.3% |
| Market cap | $159.7B | $233.2B |
| P/E (trailing) | 37.4 | 34.1 |
| Dividend yield | 6.08% | 0.28% |
| Sector / category | Health Care | Health Care |
Year-by-year returns
| Year | PFE | TMO |
|---|---|---|
| 2022 | -10.4% | -17.3% |
| 2023 | -41.3% | -3.4% |
| 2024 | -2.2% | -1.7% |
| 2025 | +0.6% | +11.8% |
| 2026 | +18.3% | +9.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PFE and TMO good diversifiers for each other?
Reasonably. At 0.45, PFE and TMO keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between PFE and TMO?
Using weekly returns as of 2026-08-27: 0.45 over 3 years, with 0.46 over the last year and 0.43 over 5 years.
Is TMO a good diversifier for PFE?
Reasonably. At 0.45, PFE and TMO keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.45 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/pfe-vs-tmo.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/pfe-vs-tmo/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: PFE correlations · TMO correlations
