BSTZ vs TWN: Correlation
How closely do BlackRock Science and Technology Term Trust (BSTZ) and Taiwan Fund, Inc. (The) (TWN) trade together? Their weekly returns over three years give a correlation of 0.68, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BSTZ and TWN?
On 3 years of weekly data the BSTZ/TWN correlation comes out at 0.68, strong. Little has changed lately, as the 1-year reading of 0.70 lands near the 3-year figure. The 5-year figure is 0.59, and annualized covariance runs at 465.1 %².
Within BSTZ's tracked universe of 21 assets, TWN comes in at #9 by 3-year correlation. Correlation aside, the last 12 months split them widely, with TWN ahead by 70.4 points (+57.4% versus +127.8%).
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.
BSTZ vs TWN: side by side
| BSTZ (BlackRock Science and Technology Term Trust) | TWN (Taiwan Fund, Inc. (The)) | |
|---|---|---|
| 1-year return | +57.4% | +127.8% |
| 5-year return | +31.6% | +320.4% |
| Volatility (ann.) | 23.7% | 28.9% |
| Beta vs S&P 500 | 1.19 | 1.26 |
| Max drawdown (3Y) | -25.3% | -30.0% |
| Market cap | $2.1B | $0.6B |
| P/E (trailing) | 6.7 | 2.6 |
| Dividend yield | 0.00% | 6.18% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BSTZ | TWN |
|---|---|---|
| 2022 | -55.3% | -38.5% |
| 2023 | +18.7% | +51.7% |
| 2024 | +37.5% | +32.8% |
| 2025 | +25.1% | +54.1% |
| 2026 | +44.7% | +92.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BSTZ and TWN good diversifiers for each other?
Only partially. A correlation of 0.68 means BSTZ and TWN share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between BSTZ and TWN?
As of 2026-08-27, the correlation of weekly returns between BSTZ and TWN is 0.68 over 3 years, 0.70 over 1 year and 0.59 over 5 years.
Is TWN a good diversifier for BSTZ?
Only partially. A correlation of 0.68 means BSTZ and TWN share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.68 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
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Related comparisons
Hubs: BSTZ correlations · TWN correlations
