GLW vs TER: Correlation
How closely do Corning Inc. (GLW) and Teradyne (TER) trade together? Their weekly returns over three years give a correlation of 0.51, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are GLW and TER?
Over the past 3 years, GLW and TER moved with a correlation of 0.51, which is moderate. Little has changed lately, as the 1-year reading of 0.54 lands near the 3-year figure. Over 5 years the correlation is 0.44, and the annualized covariance of weekly returns is 1117.3 %².
By 3-year correlation, TER places #16 of the 37 assets tracked against GLW. Their recent paths diverged sharply: over the last 12 months TER outperformed by 89.1 percentage points (+129.7% for GLW against +218.8% for TER). Across three years, the rolling one-year figure varied moderately, from 0.28 to 0.61.
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.
GLW vs TER: side by side
| GLW (Corning Inc.) | TER (Teradyne) | |
|---|---|---|
| 1-year return | +129.7% | +218.8% |
| 5-year return | +331.4% | +207.9% |
| Volatility (ann.) | 42.1% | 52.5% |
| Beta vs S&P 500 | 1.15 | 1.70 |
| Max drawdown (3Y) | -51.5% | -58.2% |
| Market cap | $131.6B | $58.2B |
| P/E (trailing) | 70.4 | 50.0 |
| Dividend yield | 0.73% | 0.14% |
| Sector / category | Information Technology | Information Technology |
Year-by-year returns
| Year | GLW | TER |
|---|---|---|
| 2022 | -11.6% | -46.3% |
| 2023 | -1.2% | +24.8% |
| 2024 | +60.6% | +16.5% |
| 2025 | +87.8% | +54.4% |
| 2026 | +75.1% | +92.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are GLW and TER good diversifiers for each other?
To a limited degree. At 0.51 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 GLW and TER?
The GLW/TER correlation stands at 0.51 on a 3-year window (1 year: 0.54, 5 years: 0.44), computed from weekly returns as of 2026-08-27.
Is TER a good diversifier for GLW?
To a limited degree. At 0.51 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 0.51 mean?
A reading of 0.51 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/glw-vs-ter.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/glw-vs-ter/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: GLW correlations · TER correlations
