KLAC vs MKSI: Correlation
Measured on weekly returns over the past three years, KLA Corporation (KLAC) and MKS Inc. (MKSI) carry a correlation of 0.77, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are KLAC and MKSI?
On 3 years of weekly data the KLAC/MKSI correlation comes out at 0.77, strong. The relationship has been stable: the 1-year correlation (0.76) sits close to the 3-year figure. The 5-year figure is 0.76, and annualized covariance runs at 1782.5 %².
Among the 40 assets we track against KLAC, MKSI ranks #7 by 3-year correlation. Correlation aside, the last 12 months split them widely, with MKSI ahead by 49.6 points (+107.9% versus +157.5%).
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.
KLAC vs MKSI: side by side
| KLAC (KLA Corporation) | MKSI (MKS Inc.) | |
|---|---|---|
| 1-year return | +107.9% | +157.5% |
| 5-year return | +463.9% | +88.2% |
| Volatility (ann.) | 45.6% | 50.8% |
| Beta vs S&P 500 | 1.84 | 2.39 |
| Max drawdown (3Y) | -43.6% | -59.1% |
| Market cap | $240.1B | $18.3B |
| P/E (trailing) | 50.2 | 43.3 |
| Dividend yield | 0.44% | 0.35% |
| Sector / category | Information Technology | US Listed |
Year-by-year returns
| Year | KLAC | MKSI |
|---|---|---|
| 2022 | -11.2% | -51.0% |
| 2023 | +56.0% | +22.6% |
| 2024 | +9.4% | +2.2% |
| 2025 | +94.5% | +54.4% |
| 2026 | +51.8% | +70.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are KLAC and MKSI good diversifiers for each other?
Somewhat, no more. With 0.77 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between KLAC and MKSI?
Using weekly returns as of 2026-08-27: 0.77 over 3 years, with 0.76 over the last year and 0.76 over 5 years.
Is MKSI a good diversifier for KLAC?
Somewhat, no more. With 0.77 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.77 mean?
A reading of 0.77 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/klac-vs-mksi.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/klac-vs-mksi/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: KLAC correlations · MKSI correlations
