BST vs VXX: Correlation
BlackRock Science and Technology Trust (BST) 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 -0.66.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BST and VXX?
Over the past 3 years, BST and VXX moved with a correlation of -0.66, which is negative, meaning they tend to move in opposite directions. The relationship has been stable: the 1-year correlation (-0.64) sits close to the 3-year figure. Over 5 years the correlation is -0.61, and the annualized covariance of weekly returns is -887.8 %².
VXX is close to the least connected end of BST's tracked universe, ranking #24 of 25. Their recent paths diverged sharply: over the last 12 months BST outperformed by 90.4 percentage points (+40.7% for BST against -49.7% for VXX). Note the risk asymmetry: VXX runs 2.7 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.
BST vs VXX: side by side
| BST (BlackRock Science and Technology Trust) | VXX (iPath Series B S&P 500 VIX Short-Term Futures ETN) | |
|---|---|---|
| 1-year return | +40.7% | -49.7% |
| 5-year return | +46.7% | -95.6% |
| Volatility (ann.) | 22.2% | 60.9% |
| Beta vs S&P 500 | 1.27 | -3.31 |
| Max drawdown (3Y) | -23.4% | -83.3% |
| Market cap | – | – |
| P/E (trailing) | 6.9 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BST | VXX |
|---|---|---|
| 2022 | -38.3% | -23.8% |
| 2023 | +30.1% | -72.5% |
| 2024 | +18.0% | -26.2% |
| 2025 | +23.7% | -42.2% |
| 2026 | +30.9% | -31.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BST and VXX good diversifiers for each other?
By historical standards, yes. A correlation of -0.66 means the two rarely move for the same reasons.
FAQ
What is the correlation between BST and VXX?
Using weekly returns as of 2026-08-27: -0.66 over 3 years, with -0.64 over the last year and -0.61 over 5 years.
Is VXX a good diversifier for BST?
By historical standards, yes. A correlation of -0.66 means the two rarely move for the same reasons.
What does a correlation of -0.66 mean?
A reading of -0.66 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/bst-vs-vxx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bst-vs-vxx/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: BST correlations · VXX correlations
