AIIO vs AMS: Correlation
Measured on weekly returns over the past three years, Robo.ai Inc. - Class B (AIIO) and American Shared Hospital Services (AMS) carry a correlation of -0.25, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AIIO and AMS?
On 3 years of weekly data the AIIO/AMS correlation comes out at -0.25, negative, meaning they tend to move in opposite directions. The relationship has been stable: the 1-year correlation (-0.28) sits close to the 3-year figure. The 5-year figure is -0.21, and annualized covariance runs at -3251.2 %².
By 3-year correlation, AMS places #24 of the 35 assets tracked against AIIO. Their recent paths diverged sharply: over the last 12 months AMS outperformed by 50.6 percentage points (-91.3% for AIIO against -40.7% for AMS). One caveat on sizing: AIIO is 6.0 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.
AIIO vs AMS: side by side
| AIIO (Robo.ai Inc. - Class B) | AMS (American Shared Hospital Services) | |
|---|---|---|
| 1-year return | -91.3% | -40.7% |
| 5-year return | -98.8% | -45.7% |
| Volatility (ann.) | 280.6% | 46.6% |
| Beta vs S&P 500 | 0.74 | 0.34 |
| Max drawdown (3Y) | -99.7% | -64.2% |
| Market cap | $0.4B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AIIO | AMS |
|---|---|---|
| 2022 | -9.2% | +23.6% |
| 2023 | -27.5% | -18.8% |
| 2024 | -91.0% | +34.0% |
| 2025 | -56.6% | -33.9% |
| 2026 | -61.3% | -30.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AIIO and AMS good diversifiers for each other?
By historical standards, yes. A correlation of -0.25 means the two rarely move for the same reasons.
FAQ
What is the correlation between AIIO and AMS?
Using weekly returns as of 2026-08-27: -0.25 over 3 years, with -0.28 over the last year and -0.21 over 5 years.
Is AMS a good diversifier for AIIO?
By historical standards, yes. A correlation of -0.25 means the two rarely move for the same reasons.
What does a correlation of -0.25 mean?
A reading of -0.25 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/aiio-vs-ams.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/aiio-vs-ams/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: AIIO correlations · AMS correlations
