IDT vs RDN: Correlation
How closely do IDT Corporation (IDT) and Radian Group Inc. (RDN) trade together? Their weekly returns over three years give a correlation of 0.44, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IDT and RDN?
On 3 years of weekly data the IDT/RDN correlation comes out at 0.44, moderate. Recent behaviour matches the longer record: 0.50 over 1 year against 0.44 over 3. The 5-year figure is 0.30, and annualized covariance runs at 350.2 %².
In IDT's tracked universe of 14 assets, RDN sits right near the top at #1. Their 12-month results are close: +9.1% for IDT against +7.6% for RDN.
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.
IDT vs RDN: side by side
| IDT (IDT Corporation) | RDN (Radian Group Inc.) | |
|---|---|---|
| 1-year return | +9.1% | +7.6% |
| 5-year return | +58.8% | +82.4% |
| Volatility (ann.) | 34.0% | 23.5% |
| Beta vs S&P 500 | 0.70 | 0.64 |
| Max drawdown (3Y) | -33.2% | -16.5% |
| Market cap | – | $4.8B |
| P/E (trailing) | 21.2 | 9.1 |
| Dividend yield | 0.36% | 2.77% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | IDT | RDN |
|---|---|---|
| 2022 | -36.2% | -6.3% |
| 2023 | +21.0% | +55.3% |
| 2024 | +40.1% | +14.5% |
| 2025 | +8.2% | +16.9% |
| 2026 | +34.8% | +3.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IDT and RDN good diversifiers for each other?
Reasonably. At 0.44, IDT and RDN keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between IDT and RDN?
The IDT/RDN correlation stands at 0.44 on a 3-year window (1 year: 0.50, 5 years: 0.30), computed from weekly returns as of 2026-08-27.
Is RDN a good diversifier for IDT?
Reasonably. At 0.44, IDT and RDN keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.44 mean?
A reading of 0.44 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/idt-vs-rdn.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/idt-vs-rdn/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: IDT correlations · RDN correlations
