ACIU vs ASTS: Correlation
AC Immune SA (ACIU) and AST SpaceMobile, Inc. (ASTS) show a moderate relationship: their 3-year correlation of weekly returns is 0.40.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACIU and ASTS?
Over the past 3 years, ACIU and ASTS moved with a correlation of 0.40, which is moderate. The past 12 months show a weaker link (0.28) than the 3-year average (0.40). Over 5 years the correlation is 0.26, and the annualized covariance of weekly returns is 3334.3 %².
ASTS is one of the assets that tracks ACIU most closely: it ranks #2 out of the 11 assets we track against ACIU. Their 12-month results are close: +30.9% for ACIU against +27.3% for ASTS. One caveat on sizing: ASTS is 1.7 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.
ACIU vs ASTS: side by side
| ACIU (AC Immune SA) | ASTS (AST SpaceMobile, Inc.) | |
|---|---|---|
| 1-year return | +30.9% | +27.3% |
| 5-year return | -61.2% | +397.1% |
| Volatility (ann.) | 69.0% | 119.4% |
| Beta vs S&P 500 | 1.20 | 1.92 |
| Max drawdown (3Y) | -70.4% | -68.4% |
| Market cap | $0.3B | $23.9B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACIU | ASTS |
|---|---|---|
| 2022 | -58.8% | -39.3% |
| 2023 | +145.1% | +25.1% |
| 2024 | -46.0% | +249.9% |
| 2025 | +16.3% | +244.2% |
| 2026 | -13.7% | -15.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACIU and ASTS good diversifiers for each other?
A fair diversifier. At 0.40, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ACIU and ASTS?
Using weekly returns as of 2026-08-27: 0.40 over 3 years, with 0.28 over the last year and 0.26 over 5 years.
Is ASTS a good diversifier for ACIU?
A fair diversifier. At 0.40, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.40 mean?
A reading of 0.40 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/aciu-vs-asts.json
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Related comparisons
Hubs: ACIU correlations · ASTS correlations
