NPK vs VXX: Correlation
National Presto Industries, Inc. (NPK) and iPath Series B S&P 500 VIX Short-Term Futures ETN (VXX) show a negative relationship: their 3-year correlation of weekly returns is -0.30.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NPK and VXX?
On 3 years of weekly data the NPK/VXX correlation comes out at -0.30, negative, meaning they tend to move in opposite directions. The past 12 months show a tighter link (-0.04) than the 3-year average (-0.30). The 5-year figure is -0.28, and annualized covariance runs at -529.1 %².
VXX is close to the least connected end of NPK's tracked universe, ranking #9 of 10. Their recent paths diverged sharply: over the last 12 months NPK outperformed by 93.9 percentage points (+44.2% for NPK against -49.7% for VXX). Risk is not evenly split, since VXX carries 2.1 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.
NPK vs VXX: side by side
| NPK (National Presto Industries, Inc.) | VXX (iPath Series B S&P 500 VIX Short-Term Futures ETN) | |
|---|---|---|
| 1-year return | +44.2% | -49.7% |
| 5-year return | +115.3% | -95.6% |
| Volatility (ann.) | 28.9% | 60.9% |
| Beta vs S&P 500 | 0.70 | -3.31 |
| Max drawdown (3Y) | -23.3% | -83.3% |
| Market cap | $1.1B | – |
| P/E (trailing) | 25.2 | – |
| Dividend yield | 0.66% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NPK | VXX |
|---|---|---|
| 2022 | -11.8% | -23.8% |
| 2023 | +23.8% | -72.5% |
| 2024 | +29.9% | -26.2% |
| 2025 | +9.6% | -42.2% |
| 2026 | +44.8% | -31.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NPK and VXX good diversifiers for each other?
Yes. With a correlation of -0.30, NPK and VXX have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between NPK and VXX?
As of 2026-08-27, the correlation of weekly returns between NPK and VXX is -0.30 over 3 years, -0.04 over 1 year and -0.28 over 5 years.
Is VXX a good diversifier for NPK?
Yes. With a correlation of -0.30, NPK and VXX have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.30 mean?
A reading of -0.30 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/npk-vs-vxx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/npk-vs-vxx/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: NPK correlations · VXX correlations
