IRDM vs NFJ: Correlation
Measured on weekly returns over the past three years, Iridium Communications Inc (IRDM) and Virtus Dividend, Interest & Premium Strategy Fund (NFJ) carry a correlation of 0.37, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IRDM and NFJ?
Across a 3-year window, the weekly returns of IRDM and NFJ correlate at 0.37, moderate. Recent behaviour matches the longer record: 0.33 over 1 year against 0.37 over 3. Stretching to 5 years gives 0.33, with an annualized covariance of 253.6 %².
Within IRDM's tracked universe of 12 assets, NFJ comes in at #4 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months IRDM outperformed by 64.4 percentage points (+95.4% for IRDM against +31.0% for NFJ). Risk is not evenly split, since IRDM carries 3.6 times the volatility of the other side.
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.
IRDM vs NFJ: side by side
| IRDM (Iridium Communications Inc) | NFJ (Virtus Dividend, Interest & Premium Strategy Fund) | |
|---|---|---|
| 1-year return | +95.4% | +31.0% |
| 5-year return | +8.5% | +50.8% |
| Volatility (ann.) | 49.3% | 13.8% |
| Beta vs S&P 500 | 0.85 | 0.73 |
| Max drawdown (3Y) | -67.5% | -17.0% |
| Market cap | $5.0B | $1.5B |
| P/E (trailing) | 54.1 | 9.8 |
| Dividend yield | 1.27% | 7.83% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | IRDM | NFJ |
|---|---|---|
| 2022 | +24.5% | -23.9% |
| 2023 | -19.1% | +21.3% |
| 2024 | -28.1% | +10.0% |
| 2025 | -38.5% | +12.4% |
| 2026 | +176.6% | +26.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IRDM and NFJ good diversifiers for each other?
Reasonably. At 0.37, IRDM and NFJ keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between IRDM and NFJ?
The IRDM/NFJ correlation stands at 0.37 on a 3-year window (1 year: 0.33, 5 years: 0.33), computed from weekly returns as of 2026-08-27.
Is NFJ a good diversifier for IRDM?
Reasonably. At 0.37, IRDM and NFJ keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.37 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/irdm-vs-nfj.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/irdm-vs-nfj/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: IRDM correlations · NFJ correlations
