BDX vs DGX: Correlation
How closely do Becton Dickinson (BDX) and Quest Diagnostics (DGX) trade together? Their weekly returns over three years give a correlation of 0.33, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BDX and DGX?
On 3 years of weekly data the BDX/DGX correlation comes out at 0.33, moderate. Little has changed lately, as the 1-year reading of 0.43 lands near the 3-year figure. The 5-year figure is 0.31, and annualized covariance runs at 149.3 %².
By 3-year correlation, DGX places #16 of the 28 assets tracked against BDX. The trailing year gives DGX the advantage: +25.5% versus +38.5%, a 13.0-point spread. The rolling one-year correlation moved between 0.03 and 0.45 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.
BDX vs DGX: side by side
| BDX (Becton Dickinson) | DGX (Quest Diagnostics) | |
|---|---|---|
| 1-year return | +25.5% | +38.5% |
| 5-year return | +6.8% | +78.8% |
| Volatility (ann.) | 24.0% | 19.1% |
| Beta vs S&P 500 | 0.33 | 0.09 |
| Max drawdown (3Y) | -39.6% | -12.4% |
| Market cap | $51.2B | $27.0B |
| P/E (trailing) | 32.9 | 26.0 |
| Dividend yield | 2.20% | 1.36% |
| Sector / category | Health Care | Health Care |
Year-by-year returns
| Year | BDX | DGX |
|---|---|---|
| 2022 | +5.1% | -7.8% |
| 2023 | -2.7% | -10.1% |
| 2024 | -5.4% | +11.8% |
| 2025 | -12.6% | +17.2% |
| 2026 | +25.0% | +42.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BDX and DGX good diversifiers for each other?
A fair diversifier. At 0.33, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between BDX and DGX?
The BDX/DGX correlation stands at 0.33 on a 3-year window (1 year: 0.43, 5 years: 0.31), computed from weekly returns as of 2026-08-27.
Is DGX a good diversifier for BDX?
A fair diversifier. At 0.33, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.33 mean?
A reading of 0.33 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/bdx-vs-dgx.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/bdx-vs-dgx/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: BDX correlations · DGX correlations
