MKSI vs STX: Correlation
MKS Inc. (MKSI) and Seagate Technology (STX) show a strong relationship: their 3-year correlation of weekly returns is 0.66.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are MKSI and STX?
Over the past 3 years, MKSI and STX moved with a correlation of 0.66, which is strong. Recent behaviour matches the longer record: 0.68 over 1 year against 0.66 over 3. Over 5 years the correlation is 0.62, and the annualized covariance of weekly returns is 1722.5 %².
By 3-year correlation, STX places #20 of the 41 assets tracked against MKSI. Correlation aside, the last 12 months split them widely, with STX ahead by 253.3 points (+157.5% versus +410.8%).
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.
MKSI vs STX: side by side
| MKSI (MKS Inc.) | STX (Seagate Technology) | |
|---|---|---|
| 1-year return | +157.5% | +410.8% |
| 5-year return | +88.2% | +1032.5% |
| Volatility (ann.) | 50.8% | 51.3% |
| Beta vs S&P 500 | 2.39 | 1.97 |
| Max drawdown (3Y) | -59.1% | -40.0% |
| Market cap | $18.3B | $192.0B |
| P/E (trailing) | 43.3 | 61.0 |
| Dividend yield | 0.35% | 0.35% |
| Sector / category | US Listed | Information Technology |
Year-by-year returns
| Year | MKSI | STX |
|---|---|---|
| 2022 | -51.0% | -51.4% |
| 2023 | +22.6% | +69.1% |
| 2024 | +2.2% | +4.1% |
| 2025 | +54.4% | +225.3% |
| 2026 | +70.0% | +208.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are MKSI and STX good diversifiers for each other?
To a limited degree. At 0.66 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 MKSI and STX?
Using weekly returns as of 2026-08-27: 0.66 over 3 years, with 0.68 over the last year and 0.62 over 5 years.
Is STX a good diversifier for MKSI?
To a limited degree. At 0.66 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 0.66 mean?
A reading of 0.66 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/mksi-vs-stx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/mksi-vs-stx/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: MKSI correlations · STX correlations
