KEYS vs TDY: Correlation
How closely do Keysight Technologies (KEYS) and Teledyne Technologies (TDY) trade together? Their weekly returns over three years give a correlation of 0.43, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are KEYS and TDY?
Over the past 3 years, KEYS and TDY moved with a correlation of 0.43, which is moderate. Recent behaviour matches the longer record: 0.38 over 1 year against 0.43 over 3. Over 5 years the correlation is 0.42, and the annualized covariance of weekly returns is 345.2 %².
By 3-year correlation, TDY places #28 of the 43 assets tracked against KEYS. Correlation aside, the last 12 months split them widely, with KEYS ahead by 81.7 points (+97.4% versus +15.7%). Across three years, the rolling one-year figure varied moderately, from 0.16 to 0.52. Note the risk asymmetry: KEYS runs 1.7 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
KEYS vs TDY: side by side
| KEYS (Keysight Technologies) | TDY (Teledyne Technologies) | |
|---|---|---|
| 1-year return | +97.4% | +15.7% |
| 5-year return | +81.9% | +36.5% |
| Volatility (ann.) | 36.8% | 22.0% |
| Beta vs S&P 500 | 1.58 | 0.76 |
| Max drawdown (3Y) | -31.4% | -18.8% |
| Market cap | $55.5B | $29.0B |
| P/E (trailing) | 43.5 | 30.7 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | Information Technology | Information Technology |
Year-by-year returns
| Year | KEYS | TDY |
|---|---|---|
| 2022 | -17.2% | -8.5% |
| 2023 | -7.0% | +11.6% |
| 2024 | +1.0% | +4.0% |
| 2025 | +26.5% | +10.0% |
| 2026 | +60.4% | +22.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are KEYS and TDY good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.43 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between KEYS and TDY?
As of 2026-08-27, the correlation of weekly returns between KEYS and TDY is 0.43 over 3 years, 0.38 over 1 year and 0.42 over 5 years.
Is TDY a good diversifier for KEYS?
Yes, to a useful degree: a correlation of 0.43 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.43 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
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Related comparisons
Hubs: KEYS correlations · TDY correlations
