NFJ vs WPRT: Correlation
Measured on weekly returns over the past three years, Virtus Dividend, Interest & Premium Strategy Fund (NFJ) and Westport Fuel Systems Inc (WPRT) carry a correlation of 0.48, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NFJ and WPRT?
Over the past 3 years, NFJ and WPRT moved with a correlation of 0.48, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.30 versus 0.48 over 3 years. Over 5 years the correlation is 0.48, and the annualized covariance of weekly returns is 346.0 %².
By 3-year correlation, WPRT places #28 of the 34 assets tracked against NFJ. Correlation aside, the last 12 months split them widely, with NFJ ahead by 66.5 points (+31.0% versus -35.5%). Note the risk asymmetry: WPRT runs 3.7 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.
NFJ vs WPRT: side by side
| NFJ (Virtus Dividend, Interest & Premium Strategy Fund) | WPRT (Westport Fuel Systems Inc) | |
|---|---|---|
| 1-year return | +31.0% | -35.5% |
| 5-year return | +50.8% | -95.2% |
| Volatility (ann.) | 13.8% | 51.7% |
| Beta vs S&P 500 | 0.73 | 1.44 |
| Max drawdown (3Y) | -17.0% | -80.0% |
| Market cap | $1.5B | – |
| P/E (trailing) | 9.8 | – |
| Dividend yield | 7.83% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NFJ | WPRT |
|---|---|---|
| 2022 | -23.9% | -67.5% |
| 2023 | +21.3% | -14.0% |
| 2024 | +10.0% | -45.9% |
| 2025 | +12.4% | -56.1% |
| 2026 | +26.1% | +17.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NFJ and WPRT good diversifiers for each other?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between NFJ and WPRT?
As of 2026-08-27, the correlation of weekly returns between NFJ and WPRT is 0.48 over 3 years, 0.30 over 1 year and 0.48 over 5 years.
Is WPRT a good diversifier for NFJ?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.48 mean?
On the −1 to +1 scale, 0.48 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/nfj-vs-wprt.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/nfj-vs-wprt/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: NFJ correlations · WPRT correlations
