ASPI vs MRK: Correlation
Measured on weekly returns over the past three years, ASP Isotopes Inc. (ASPI) and Merck & Co. (MRK) carry a correlation of -0.19, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ASPI and MRK?
Over the past 3 years, ASPI and MRK moved with a correlation of -0.19, which is negative, meaning they tend to move in opposite directions. The past 12 months show a weaker link (-0.35) than the 3-year average (-0.19). Over 5 years the correlation is -0.17, and the annualized covariance of weekly returns is -553.2 %².
MRK is close to the least connected end of ASPI's tracked universe, ranking #8 of 11. Their recent paths diverged sharply: over the last 12 months MRK outperformed by 143.7 percentage points (-59.9% for ASPI against +83.8% for MRK). One caveat on sizing: ASPI is 3.7 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
ASPI vs MRK: side by side
| ASPI (ASP Isotopes Inc.) | MRK (Merck & Co.) | |
|---|---|---|
| 1-year return | -59.9% | +83.8% |
| 5-year return | n/a | +128.5% |
| Volatility (ann.) | 103.1% | 27.9% |
| Beta vs S&P 500 | 2.30 | 0.28 |
| Max drawdown (3Y) | -74.8% | -43.4% |
| Market cap | $0.6B | $368.9B |
| P/E (trailing) | – | 121.6 |
| Dividend yield | 0.00% | 2.17% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | ASPI | MRK |
|---|---|---|
| 2022 | – | +49.4% |
| 2023 | +13.3% | +1.0% |
| 2024 | +153.1% | -6.3% |
| 2025 | +18.1% | +9.8% |
| 2026 | -24.5% | +44.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ASPI and MRK good diversifiers for each other?
By historical standards, yes. A correlation of -0.19 means the two rarely move for the same reasons.
FAQ
What is the correlation between ASPI and MRK?
Using weekly returns as of 2026-08-27: -0.19 over 3 years, with -0.35 over the last year and -0.17 over 5 years.
Is MRK a good diversifier for ASPI?
By historical standards, yes. A correlation of -0.19 means the two rarely move for the same reasons.
What does a correlation of -0.19 mean?
On the −1 to +1 scale, -0.19 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/aspi-vs-mrk.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/aspi-vs-mrk/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ASPI correlations · MRK correlations
