BCAT vs BST: Correlation
Measured on weekly returns over the past three years, BlackRock Capital Allocation Term Trust (BCAT) and BlackRock Science and Technology Trust (BST) carry a correlation of 0.70, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BCAT and BST?
On 3 years of weekly data the BCAT/BST correlation comes out at 0.70, strong. The relationship has been stable: the 1-year correlation (0.77) sits close to the 3-year figure. The 5-year figure is 0.73, and annualized covariance runs at 204.2 %².
In BCAT's tracked universe of 11 assets, BST sits right near the top at #2. Over the last 12 months BST came out ahead by 8.5 percentage points (+32.2% against +40.7%). Risk is not evenly split, since BST carries 1.7 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.
BCAT vs BST: side by side
| BCAT (BlackRock Capital Allocation Term Trust) | BST (BlackRock Science and Technology Trust) | |
|---|---|---|
| 1-year return | +32.2% | +40.7% |
| 5-year return | +49.6% | +46.7% |
| Volatility (ann.) | 13.1% | 22.2% |
| Beta vs S&P 500 | 0.60 | 1.27 |
| Max drawdown (3Y) | -13.7% | -23.4% |
| Market cap | $1.7B | – |
| P/E (trailing) | 7.5 | 6.9 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BCAT | BST |
|---|---|---|
| 2022 | -22.6% | -38.3% |
| 2023 | +19.3% | +30.1% |
| 2024 | +19.4% | +18.0% |
| 2025 | +16.8% | +23.7% |
| 2026 | +28.4% | +30.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BCAT and BST good diversifiers for each other?
Somewhat, no more. With 0.70 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between BCAT and BST?
The BCAT/BST correlation stands at 0.70 on a 3-year window (1 year: 0.77, 5 years: 0.73), computed from weekly returns as of 2026-08-27.
Is BST a good diversifier for BCAT?
Somewhat, no more. With 0.70 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.70 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bcat-vs-bst.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bcat-vs-bst/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: BCAT correlations · BST correlations
