AIIO vs MLSS: Correlation
How closely do Robo.ai Inc. - Class B (AIIO) and Milestone Scientific, Inc. (MLSS) trade together? Their weekly returns over three years give a correlation of -0.23, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AIIO and MLSS?
Across a 3-year window, the weekly returns of AIIO and MLSS correlate at -0.23, negative, meaning they tend to move in opposite directions. Recent behaviour matches the longer record: -0.31 over 1 year against -0.23 over 3. Stretching to 5 years gives -0.19, with an annualized covariance of -5350.2 %².
Among the 35 assets we track against AIIO, MLSS ranks #21 by 3-year correlation. Correlation aside, the last 12 months split them widely, with MLSS ahead by 75.5 points (-91.3% versus -15.8%). One caveat on sizing: AIIO is 3.3 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 MLSS: side by side
| AIIO (Robo.ai Inc. - Class B) | MLSS (Milestone Scientific, Inc.) | |
|---|---|---|
| 1-year return | -91.3% | -15.8% |
| 5-year return | -98.8% | -72.6% |
| Volatility (ann.) | 280.6% | 84.1% |
| Beta vs S&P 500 | 0.74 | 0.81 |
| Max drawdown (3Y) | -99.7% | -81.2% |
| 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 | MLSS |
|---|---|---|
| 2022 | -9.2% | -76.7% |
| 2023 | -27.5% | +43.8% |
| 2024 | -91.0% | +39.1% |
| 2025 | -56.6% | -71.9% |
| 2026 | -61.3% | +87.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AIIO and MLSS good diversifiers for each other?
Yes: at -0.23, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between AIIO and MLSS?
Using weekly returns as of 2026-08-27: -0.23 over 3 years, with -0.31 over the last year and -0.19 over 5 years.
Is MLSS a good diversifier for AIIO?
Yes: at -0.23, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.23 mean?
On the −1 to +1 scale, -0.23 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/aiio-vs-mlss.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/aiio-vs-mlss/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AIIO correlations · MLSS correlations
