BSX vs VXX: Correlation
Measured on weekly returns over the past three years, Boston Scientific (BSX) and iPath Series B S&P 500 VIX Short-Term Futures ETN (VXX) carry a correlation of -0.32, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BSX and VXX?
On 3 years of weekly data the BSX/VXX correlation comes out at -0.32, negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (-0.12) runs above the 3-year figure (-0.32). The 5-year figure is -0.37, and annualized covariance runs at -540.0 %².
Out of 33 assets tracked against BSX, VXX lands near the bottom at #30. The trailing year gives VXX the advantage: -55.9% versus -49.7%, a 6.2-point spread. One caveat on sizing: VXX is 2.2 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
BSX vs VXX: side by side
| BSX (Boston Scientific) | VXX (iPath Series B S&P 500 VIX Short-Term Futures ETN) | |
|---|---|---|
| 1-year return | -55.9% | -49.7% |
| 5-year return | +4.1% | -95.6% |
| Volatility (ann.) | 27.6% | 60.9% |
| Beta vs S&P 500 | 0.72 | -3.31 |
| Max drawdown (3Y) | -60.6% | -83.3% |
| Market cap | $67.6B | – |
| P/E (trailing) | 19.5 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | Health Care | US Listed |
Year-by-year returns
| Year | BSX | VXX |
|---|---|---|
| 2022 | +8.9% | -23.8% |
| 2023 | +24.9% | -72.5% |
| 2024 | +54.5% | -26.2% |
| 2025 | +6.8% | -42.2% |
| 2026 | -51.1% | -31.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BSX and VXX good diversifiers for each other?
Yes. With a correlation of -0.32, BSX and VXX have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between BSX and VXX?
The BSX/VXX correlation stands at -0.32 on a 3-year window (1 year: -0.12, 5 years: -0.37), computed from weekly returns as of 2026-08-27.
Is VXX a good diversifier for BSX?
Yes. With a correlation of -0.32, BSX and VXX have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.32 mean?
On the −1 to +1 scale, -0.32 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/bsx-vs-vxx.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bsx-vs-vxx/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: BSX correlations · VXX correlations
