AMS vs MRDN: Correlation
Measured on weekly returns over the past three years, American Shared Hospital Services (AMS) and Meridian Holdings Inc. (MRDN) carry a correlation of 0.35, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AMS and MRDN?
Across a 3-year window, the weekly returns of AMS and MRDN correlate at 0.35, moderate. The link has tightened recently: the 1-year correlation (0.52) runs above the 3-year figure (0.35). Stretching to 5 years gives 0.29, with an annualized covariance of 1448.5 %².
By 3-year correlation, MRDN places #5 of the 11 assets tracked against AMS. The last year tells two different stories: MRDN led by 31.1 percentage points, -40.7% for AMS against -9.6% for MRDN. One caveat on sizing: MRDN is 1.9 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.
AMS vs MRDN: side by side
| AMS (American Shared Hospital Services) | MRDN (Meridian Holdings Inc.) | |
|---|---|---|
| 1-year return | -40.7% | -9.6% |
| 5-year return | -45.7% | -82.1% |
| Volatility (ann.) | 46.6% | 89.9% |
| Beta vs S&P 500 | 0.34 | 0.53 |
| Max drawdown (3Y) | -64.2% | -91.7% |
| Market cap | – | $0.2B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AMS | MRDN |
|---|---|---|
| 2022 | +23.6% | -60.4% |
| 2023 | -18.8% | -5.1% |
| 2024 | +34.0% | -17.8% |
| 2025 | -33.9% | -59.5% |
| 2026 | -30.8% | +45.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AMS and MRDN good diversifiers for each other?
A fair diversifier. At 0.35, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between AMS and MRDN?
The AMS/MRDN correlation stands at 0.35 on a 3-year window (1 year: 0.52, 5 years: 0.29), computed from weekly returns as of 2026-08-27.
Is MRDN a good diversifier for AMS?
A fair diversifier. At 0.35, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.35 mean?
On the −1 to +1 scale, 0.35 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/ams-vs-mrdn.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/ams-vs-mrdn/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: AMS correlations · MRDN correlations
