TER vs WDC: Correlation
How closely do Teradyne (TER) and Western Digital (WDC) trade together? Their weekly returns over three years give a correlation of 0.58, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are TER and WDC?
On 3 years of weekly data the TER/WDC correlation comes out at 0.58, moderate. The relationship has been stable: the 1-year correlation (0.59) sits close to the 3-year figure. The 5-year figure is 0.58, and annualized covariance runs at 1756.8 %².
By 3-year correlation, WDC places #13 of the 34 assets tracked against TER. Correlation aside, the last 12 months split them widely, with WDC ahead by 255.5 points (+218.8% versus +474.3%). The rolling one-year correlation moved between 0.36 and 0.71 over the past three years, a moderate range.
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.
TER vs WDC: side by side
| TER (Teradyne) | WDC (Western Digital) | |
|---|---|---|
| 1-year return | +218.8% | +474.3% |
| 5-year return | +207.9% | +889.2% |
| Volatility (ann.) | 52.5% | 58.0% |
| Beta vs S&P 500 | 1.70 | 2.15 |
| Max drawdown (3Y) | -58.2% | -49.6% |
| Market cap | $58.2B | $166.6B |
| P/E (trailing) | 50.0 | 17.4 |
| Dividend yield | 0.14% | 0.11% |
| Sector / category | Information Technology | Information Technology |
Year-by-year returns
| Year | TER | WDC |
|---|---|---|
| 2022 | -46.3% | -51.6% |
| 2023 | +24.8% | +66.0% |
| 2024 | +16.5% | +13.9% |
| 2025 | +54.4% | +283.7% |
| 2026 | +92.4% | +168.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are TER and WDC good diversifiers for each other?
Only partially. A correlation of 0.58 means TER 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 TER and WDC?
The TER/WDC correlation stands at 0.58 on a 3-year window (1 year: 0.59, 5 years: 0.58), computed from weekly returns as of 2026-08-27.
Is WDC a good diversifier for TER?
Only partially. A correlation of 0.58 means TER 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 0.58 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/ter-vs-wdc.json
Embed this badge (it refreshes with the data), with attribution:
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Related comparisons
Hubs: TER correlations · WDC correlations
