ACIU vs LYEL: Correlation
AC Immune SA (ACIU) and Lyell Immunopharma, Inc. (LYEL) show a moderate relationship: their 3-year correlation of weekly returns is 0.45.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACIU and LYEL?
Across a 3-year window, the weekly returns of ACIU and LYEL correlate at 0.45, moderate. Little has changed lately, as the 1-year reading of 0.51 lands near the 3-year figure. Stretching to 5 years gives 0.39, with an annualized covariance of 3103.8 %².
Few assets follow ACIU as closely as LYEL, which ranks #1 of 11 tracked partners. Their 12-month results are close: +30.9% for ACIU against +29.5% for LYEL.
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 LYEL: side by side
| ACIU (AC Immune SA) | LYEL (Lyell Immunopharma, Inc.) | |
|---|---|---|
| 1-year return | +30.9% | +29.5% |
| 5-year return | -61.2% | -95.4% |
| Volatility (ann.) | 69.0% | 99.9% |
| Beta vs S&P 500 | 1.20 | 2.09 |
| Max drawdown (3Y) | -70.4% | -87.3% |
| Market cap | $0.3B | $0.4B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACIU | LYEL |
|---|---|---|
| 2022 | -58.8% | -55.2% |
| 2023 | +145.1% | -44.1% |
| 2024 | -46.0% | -67.0% |
| 2025 | +16.3% | +140.5% |
| 2026 | -13.7% | -52.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACIU and LYEL good diversifiers for each other?
Reasonably. At 0.45, ACIU and LYEL keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between ACIU and LYEL?
As of 2026-08-27, the correlation of weekly returns between ACIU and LYEL is 0.45 over 3 years, 0.51 over 1 year and 0.39 over 5 years.
Is LYEL a good diversifier for ACIU?
Reasonably. At 0.45, ACIU and LYEL keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.45 mean?
On the −1 to +1 scale, 0.45 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
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Related comparisons
Hubs: ACIU correlations · LYEL correlations
