BSTZ vs MTUM: Correlation
How closely do BlackRock Science and Technology Term Trust (BSTZ) and iShares MSCI USA Momentum Factor ETF (MTUM) trade together? Their weekly returns over three years give a correlation of 0.77, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BSTZ and MTUM?
Over the past 3 years, BSTZ and MTUM moved with a correlation of 0.77, which is strong. The relationship has been stable: the 1-year correlation (0.76) sits close to the 3-year figure. Over 5 years the correlation is 0.72, and the annualized covariance of weekly returns is 374.6 %².
By 3-year correlation, MTUM places #4 of the 21 assets tracked against BSTZ. Their recent paths diverged sharply: over the last 12 months BSTZ outperformed by 32.2 percentage points (+57.4% for BSTZ against +25.2% for MTUM).
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 MTUM: side by side
| BSTZ (BlackRock Science and Technology Term Trust) | MTUM (iShares MSCI USA Momentum Factor ETF) | |
|---|---|---|
| 1-year return | +57.4% | +25.2% |
| 5-year return | +31.6% | +76.1% |
| Volatility (ann.) | 23.7% | 20.6% |
| Beta vs S&P 500 | 1.19 | 1.25 |
| Max drawdown (3Y) | -25.3% | -21.0% |
| Market cap | $2.1B | – |
| P/E (trailing) | 6.7 | – |
| Dividend yield | 0.00% | 0.62% |
| Expense ratio | – | 0.15% |
| Assets under management | – | $25.3B |
| Sector / category | US Listed | ETF · US Style |
MTUM is a Large Blend fund from iShares: $25.3B under management, 126 holdings, a 0.15% expense ratio, a 0.62% trailing dividend yield.
Year-by-year returns
| Year | BSTZ | MTUM |
|---|---|---|
| 2022 | -55.3% | -18.3% |
| 2023 | +18.7% | +9.1% |
| 2024 | +37.5% | +32.9% |
| 2025 | +25.1% | +22.1% |
| 2026 | +44.7% | +21.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BSTZ and MTUM good diversifiers for each other?
To a limited degree. At 0.77 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 BSTZ and MTUM?
The BSTZ/MTUM correlation stands at 0.77 on a 3-year window (1 year: 0.76, 5 years: 0.72), computed from weekly returns as of 2026-08-27.
Is MTUM a good diversifier for BSTZ?
To a limited degree. At 0.77 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 0.77 mean?
On the −1 to +1 scale, 0.77 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/bstz-vs-mtum.json
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Related comparisons
Hubs: BSTZ correlations · MTUM correlations
