CYD vs STM: Correlation
Measured on weekly returns over the past three years, China Yuchai International Limited (CYD) and STMicroelectronics N.V. (STM) carry a correlation of 0.35, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CYD and STM?
Across a 3-year window, the weekly returns of CYD and STM correlate at 0.35, moderate. Recent behaviour matches the longer record: 0.25 over 1 year against 0.35 over 3. Stretching to 5 years gives 0.33, with an annualized covariance of 1041.2 %².
Among the 11 assets we track against CYD, STM ranks #4 by 3-year correlation. The last year tells two different stories: STM led by 65.0 percentage points, +26.0% for CYD against +91.0% for STM.
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.
CYD vs STM: side by side
| CYD (China Yuchai International Limited) | STM (STMicroelectronics N.V.) | |
|---|---|---|
| 1-year return | +26.0% | +91.0% |
| 5-year return | +236.2% | +19.4% |
| Volatility (ann.) | 64.2% | 46.5% |
| Beta vs S&P 500 | 1.06 | 1.62 |
| Max drawdown (3Y) | -44.5% | -64.6% |
| Market cap | – | $45.8B |
| P/E (trailing) | 13.8 | – |
| Dividend yield | 0.00% | 0.72% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CYD | STM |
|---|---|---|
| 2022 | -50.3% | -26.8% |
| 2023 | +21.6% | +41.7% |
| 2024 | +17.7% | -49.7% |
| 2025 | +281.2% | +5.3% |
| 2026 | +16.0% | +98.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CYD and STM good diversifiers for each other?
A fair diversifier. At 0.35, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between CYD and STM?
As of 2026-08-27, the correlation of weekly returns between CYD and STM is 0.35 over 3 years, 0.25 over 1 year and 0.33 over 5 years.
Is STM a good diversifier for CYD?
A fair diversifier. At 0.35, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.35 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/cyd-vs-stm.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cyd-vs-stm/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: CYD correlations · STM correlations
