AEIS vs MKSI: Correlation
Advanced Energy Industries, Inc. (AEIS) and MKS Inc. (MKSI) show a strong relationship: their 3-year correlation of weekly returns is 0.75.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AEIS and MKSI?
Over the past 3 years, AEIS and MKSI moved with a correlation of 0.75, which is strong. Recent behaviour matches the longer record: 0.71 over 1 year against 0.75 over 3. Over 5 years the correlation is 0.74, and the annualized covariance of weekly returns is 1679.7 %².
MKSI is one of the assets that tracks AEIS most closely: it ranks #1 out of the 32 assets we track against AEIS. Their recent paths diverged sharply: over the last 12 months MKSI outperformed by 70.5 percentage points (+87.0% for AEIS against +157.5% for MKSI).
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.
AEIS vs MKSI: side by side
| AEIS (Advanced Energy Industries, Inc.) | MKSI (MKS Inc.) | |
|---|---|---|
| 1-year return | +87.0% | +157.5% |
| 5-year return | +222.9% | +88.2% |
| Volatility (ann.) | 43.9% | 50.8% |
| Beta vs S&P 500 | 1.69 | 2.39 |
| Max drawdown (3Y) | -39.9% | -59.1% |
| Market cap | $11.5B | $18.3B |
| P/E (trailing) | 52.4 | 43.3 |
| Dividend yield | 0.14% | 0.35% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AEIS | MKSI |
|---|---|---|
| 2022 | -5.4% | -51.0% |
| 2023 | +27.5% | +22.6% |
| 2024 | +6.6% | +2.2% |
| 2025 | +81.6% | +54.4% |
| 2026 | +37.3% | +70.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AEIS and MKSI good diversifiers for each other?
To a limited degree. At 0.75 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between AEIS and MKSI?
As of 2026-08-27, the correlation of weekly returns between AEIS and MKSI is 0.75 over 3 years, 0.71 over 1 year and 0.74 over 5 years.
Is MKSI a good diversifier for AEIS?
To a limited degree. At 0.75 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.75 mean?
On the −1 to +1 scale, 0.75 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/aeis-vs-mksi.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/aeis-vs-mksi/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AEIS correlations · MKSI correlations
