COHU vs WDC: Correlation
How closely do Cohu, Inc. (COHU) and Western Digital (WDC) trade together? Their weekly returns over three years give a correlation of 0.62, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COHU and WDC?
Across a 3-year window, the weekly returns of COHU and WDC correlate at 0.62, strong. Little has changed lately, as the 1-year reading of 0.55 lands near the 3-year figure. Stretching to 5 years gives 0.60, with an annualized covariance of 1606.3 %².
By 3-year correlation, WDC places #10 of the 24 assets tracked against COHU. The last year tells two different stories: WDC led by 319.5 percentage points, +154.8% for COHU against +474.3% for WDC.
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.
COHU vs WDC: side by side
| COHU (Cohu, Inc.) | WDC (Western Digital) | |
|---|---|---|
| 1-year return | +154.8% | +474.3% |
| 5-year return | +41.3% | +889.2% |
| Volatility (ann.) | 44.8% | 58.0% |
| Beta vs S&P 500 | 1.74 | 2.15 |
| Max drawdown (3Y) | -64.7% | -49.6% |
| Market cap | $2.4B | $166.6B |
| P/E (trailing) | – | 17.4 |
| Dividend yield | 0.00% | 0.11% |
| Sector / category | US Listed | Information Technology |
Year-by-year returns
| Year | COHU | WDC |
|---|---|---|
| 2022 | -15.9% | -51.6% |
| 2023 | +10.4% | +66.0% |
| 2024 | -24.6% | +13.9% |
| 2025 | -12.8% | +283.7% |
| 2026 | +122.1% | +168.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COHU and WDC good diversifiers for each other?
Only partially. A correlation of 0.62 means COHU and WDC 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 COHU and WDC?
Using weekly returns as of 2026-08-27: 0.62 over 3 years, with 0.55 over the last year and 0.60 over 5 years.
Is WDC a good diversifier for COHU?
Only partially. A correlation of 0.62 means COHU and WDC share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.62 mean?
A reading of 0.62 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/cohu-vs-wdc.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/cohu-vs-wdc/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: COHU correlations · WDC correlations
