ACLS vs VXX: Correlation
How closely do Axcelis Technologies, Inc. (ACLS) and iPath Series B S&P 500 VIX Short-Term Futures ETN (VXX) trade together? Their weekly returns over three years give a correlation of -0.34, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACLS and VXX?
On 3 years of weekly data the ACLS/VXX correlation comes out at -0.34, negative, meaning they tend to move in opposite directions. Lately the two have moved closer together, with the 1-year correlation at -0.09 versus -0.34 over 3 years. The 5-year figure is -0.36, and annualized covariance runs at -1076.9 %².
Out of 11 assets tracked against ACLS, VXX lands near the bottom at #10. Their recent paths diverged sharply: over the last 12 months ACLS outperformed by 99.1 percentage points (+49.4% for ACLS against -49.7% for VXX).
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.
ACLS vs VXX: side by side
| ACLS (Axcelis Technologies, Inc.) | VXX (iPath Series B S&P 500 VIX Short-Term Futures ETN) | |
|---|---|---|
| 1-year return | +49.4% | -49.7% |
| 5-year return | +140.5% | -95.6% |
| Volatility (ann.) | 51.6% | 60.9% |
| Beta vs S&P 500 | 1.57 | -3.31 |
| Max drawdown (3Y) | -78.0% | -83.3% |
| Market cap | $3.8B | – |
| P/E (trailing) | 40.4 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACLS | VXX |
|---|---|---|
| 2022 | +6.4% | -23.8% |
| 2023 | +63.4% | -72.5% |
| 2024 | -46.1% | -26.2% |
| 2025 | +15.0% | -42.2% |
| 2026 | +52.4% | -31.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACLS and VXX good diversifiers for each other?
Yes: at -0.34, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between ACLS and VXX?
Using weekly returns as of 2026-08-27: -0.34 over 3 years, with -0.09 over the last year and -0.36 over 5 years.
Is VXX a good diversifier for ACLS?
Yes: at -0.34, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.34 mean?
A reading of -0.34 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/acls-vs-vxx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/acls-vs-vxx/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: ACLS correlations · VXX correlations
