RFAI vs TDY: Correlation
How closely do RF Acquisition Corp II (RFAI) and Teledyne Technologies (TDY) trade together? Their weekly returns over three years give a correlation of -0.20, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are RFAI and TDY?
Over the past 3 years, RFAI and TDY moved with a correlation of -0.20, which is negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.31 versus -0.20 over 3 years. Over 5 years the correlation is n/a, and the annualized covariance of weekly returns is -1357.3 %².
By 3-year correlation, TDY places #33 of the 65 assets tracked against RFAI. Correlation aside, the last 12 months split them widely, with RFAI ahead by 373.8 points (+389.5% versus +15.7%). One caveat on sizing: RFAI is 13.1 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
RFAI vs TDY: side by side
| RFAI (RF Acquisition Corp II) | TDY (Teledyne Technologies) | |
|---|---|---|
| 1-year return | +389.5% | +15.7% |
| 5-year return | n/a | +36.5% |
| Volatility (ann.) | 288.3% | 22.0% |
| Beta vs S&P 500 | -1.62 | 0.76 |
| Max drawdown (3Y) | -16.5% | -18.8% |
| Market cap | $0.4B | $29.0B |
| P/E (trailing) | 399.9 | 30.7 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | Information Technology |
Year-by-year returns
| Year | RFAI | TDY |
|---|---|---|
| 2022 | – | -8.5% |
| 2023 | – | +11.6% |
| 2024 | – | +4.0% |
| 2025 | +5.2% | +10.0% |
| 2026 | +383.6% | +22.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are RFAI and TDY good diversifiers for each other?
Yes: at -0.20, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between RFAI and TDY?
As of 2026-08-27, the correlation of weekly returns between RFAI and TDY is -0.20 over 3 years, -0.31 over 1 year and n/a over 5 years.
Is TDY a good diversifier for RFAI?
Yes: at -0.20, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.20 mean?
On the −1 to +1 scale, -0.20 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/rfai-vs-tdy.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/rfai-vs-tdy/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: RFAI correlations · TDY correlations
