CET vs DXCM: Correlation
Central Securities Corporation (CET) and Dexcom (DXCM) show a moderate relationship: their 3-year correlation of weekly returns is 0.39.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CET and DXCM?
Over the past 3 years, CET and DXCM moved with a correlation of 0.39, which is moderate. Little has changed lately, as the 1-year reading of 0.33 lands near the 3-year figure. Over 5 years the correlation is 0.39, and the annualized covariance of weekly returns is 230.8 %².
Among the 38 assets we track against CET, DXCM sits near the bottom by co-movement, at rank #34. Twelve-month performance is nearly a tie, at +15.7% for CET and +16.9% for DXCM. Risk is not evenly split, since DXCM carries 3.6 times the volatility of the other side.
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.
CET vs DXCM: side by side
| CET (Central Securities Corporation) | DXCM (Dexcom) | |
|---|---|---|
| 1-year return | +15.7% | +16.9% |
| 5-year return | +73.3% | -31.5% |
| Volatility (ann.) | 12.8% | 46.7% |
| Beta vs S&P 500 | 0.78 | 1.02 |
| Max drawdown (3Y) | -15.4% | -61.0% |
| Market cap | – | $33.7B |
| P/E (trailing) | 7.3 | 35.2 |
| Dividend yield | 5.03% | 0.00% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | CET | DXCM |
|---|---|---|
| 2022 | -19.7% | -15.6% |
| 2023 | +19.2% | +9.6% |
| 2024 | +26.8% | -37.3% |
| 2025 | +17.2% | -14.7% |
| 2026 | +8.3% | +34.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CET and DXCM good diversifiers for each other?
Reasonably. At 0.39, CET and DXCM keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between CET and DXCM?
Using weekly returns as of 2026-08-27: 0.39 over 3 years, with 0.33 over the last year and 0.39 over 5 years.
Is DXCM a good diversifier for CET?
Reasonably. At 0.39, CET and DXCM keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.39 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/cet-vs-dxcm.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cet-vs-dxcm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CET correlations · DXCM correlations
