ALAB vs BST: Correlation
Measured on weekly returns over the past three years, Astera Labs, Inc. (ALAB) and BlackRock Science and Technology Trust (BST) carry a correlation of 0.56, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ALAB and BST?
Across a 3-year window, the weekly returns of ALAB and BST correlate at 0.56, moderate. Recent behaviour matches the longer record: 0.56 over 1 year against 0.56 over 3. Stretching to 5 years gives n/a, with an annualized covariance of 1071.8 %².
BST is one of the assets that tracks ALAB most closely: it ranks #2 out of the 18 assets we track against ALAB. The last year tells two different stories: ALAB led by 29.0 percentage points, +69.7% for ALAB against +40.7% for BST. Note the risk asymmetry: ALAB runs 3.8 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.
ALAB vs BST: side by side
| ALAB (Astera Labs, Inc.) | BST (BlackRock Science and Technology Trust) | |
|---|---|---|
| 1-year return | +69.7% | +40.7% |
| 5-year return | n/a | +46.7% |
| Volatility (ann.) | 84.6% | 22.2% |
| Beta vs S&P 500 | 2.90 | 1.27 |
| Max drawdown (3Y) | -63.7% | -23.4% |
| Market cap | $52.8B | – |
| P/E (trailing) | 142.8 | 6.9 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ALAB | BST |
|---|---|---|
| 2022 | – | -38.3% |
| 2023 | – | +30.1% |
| 2024 | – | +18.0% |
| 2025 | +25.6% | +23.7% |
| 2026 | +82.8% | +30.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ALAB and BST good diversifiers for each other?
To a limited degree. At 0.56 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between ALAB and BST?
As of 2026-08-27, the correlation of weekly returns between ALAB and BST is 0.56 over 3 years, 0.56 over 1 year and n/a over 5 years.
Is BST a good diversifier for ALAB?
To a limited degree. At 0.56 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.56 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/alab-vs-bst.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/alab-vs-bst/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: ALAB correlations · BST correlations
