PDFS vs VXX: Correlation
Measured on weekly returns over the past three years, PDF Solutions, Inc. (PDFS) and iPath Series B S&P 500 VIX Short-Term Futures ETN (VXX) carry a correlation of -0.39, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PDFS and VXX?
On 3 years of weekly data the PDFS/VXX correlation comes out at -0.39, negative, meaning they tend to move in opposite directions. Lately the two have moved closer together, with the 1-year correlation at -0.21 versus -0.39 over 3 years. The 5-year figure is -0.35, and annualized covariance runs at -1139.5 %².
Out of 16 assets tracked against PDFS, VXX lands near the bottom at #16. Correlation aside, the last 12 months split them widely, with PDFS ahead by 183.3 points (+133.6% versus -49.7%).
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.
PDFS vs VXX: side by side
| PDFS (PDF Solutions, Inc.) | VXX (iPath Series B S&P 500 VIX Short-Term Futures ETN) | |
|---|---|---|
| 1-year return | +133.6% | -49.7% |
| 5-year return | +105.9% | -95.6% |
| Volatility (ann.) | 47.4% | 60.9% |
| Beta vs S&P 500 | 1.55 | -3.31 |
| Max drawdown (3Y) | -58.5% | -83.3% |
| Market cap | $1.9B | – |
| P/E (trailing) | 177.5 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | PDFS | VXX |
|---|---|---|
| 2022 | -10.3% | -23.8% |
| 2023 | +12.7% | -72.5% |
| 2024 | -15.7% | -26.2% |
| 2025 | +5.4% | -42.2% |
| 2026 | +61.8% | -31.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PDFS and VXX good diversifiers for each other?
By historical standards, yes. A correlation of -0.39 means the two rarely move for the same reasons.
FAQ
What is the correlation between PDFS and VXX?
Using weekly returns as of 2026-08-27: -0.39 over 3 years, with -0.21 over the last year and -0.35 over 5 years.
Is VXX a good diversifier for PDFS?
By historical standards, yes. A correlation of -0.39 means the two rarely move for the same reasons.
What does a correlation of -0.39 mean?
On the −1 to +1 scale, -0.39 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/pdfs-vs-vxx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/pdfs-vs-vxx/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: PDFS correlations · VXX correlations
