ACLS vs AMKR: Correlation
Axcelis Technologies, Inc. (ACLS) and Amkor Technology, Inc. (AMKR) show a strong relationship: their 3-year correlation of weekly returns is 0.68.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACLS and AMKR?
Across a 3-year window, the weekly returns of ACLS and AMKR correlate at 0.68, strong. The relationship has been stable: the 1-year correlation (0.68) sits close to the 3-year figure. Stretching to 5 years gives 0.70, with an annualized covariance of 2030.4 %².
In ACLS's tracked universe of 11 assets, AMKR sits right near the top at #3. The last year tells two different stories: AMKR led by 62.9 percentage points, +49.4% for ACLS against +112.3% for AMKR.
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.
ACLS vs AMKR: side by side
| ACLS (Axcelis Technologies, Inc.) | AMKR (Amkor Technology, Inc.) | |
|---|---|---|
| 1-year return | +49.4% | +112.3% |
| 5-year return | +140.5% | +98.2% |
| Volatility (ann.) | 51.6% | 57.4% |
| Beta vs S&P 500 | 1.57 | 2.24 |
| Max drawdown (3Y) | -78.0% | -65.9% |
| Market cap | $3.8B | $12.9B |
| P/E (trailing) | 40.4 | 21.6 |
| Dividend yield | 0.00% | 0.69% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACLS | AMKR |
|---|---|---|
| 2022 | +6.4% | -2.3% |
| 2023 | +63.4% | +40.3% |
| 2024 | -46.1% | -20.8% |
| 2025 | +15.0% | +55.9% |
| 2026 | +52.4% | +31.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACLS and AMKR good diversifiers for each other?
Only partially. A correlation of 0.68 means ACLS and AMKR share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between ACLS and AMKR?
Using weekly returns as of 2026-08-27: 0.68 over 3 years, with 0.68 over the last year and 0.70 over 5 years.
Is AMKR a good diversifier for ACLS?
Only partially. A correlation of 0.68 means ACLS and AMKR share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.68 mean?
On the −1 to +1 scale, 0.68 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/acls-vs-amkr.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/acls-vs-amkr/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ACLS correlations · AMKR correlations
