ALMU vs TLT: Correlation
Aeluma, Inc. (ALMU) and iShares 20+ Year Treasury Bond ETF (TLT) show a negative relationship: their 3-year correlation of weekly returns is -0.28.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ALMU and TLT?
On 3 years of weekly data the ALMU/TLT correlation comes out at -0.28, negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (-0.14) runs above the 3-year figure (-0.28). The 5-year figure is n/a, and annualized covariance runs at -395.9 %².
TLT is close to the least connected end of ALMU's tracked universe, ranking #20 of 20. Their recent paths diverged sharply: over the last 12 months TLT outperformed by 32.7 percentage points (-32.4% for ALMU against +0.3% for TLT). Note the risk asymmetry: ALMU runs 7.9 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.
ALMU vs TLT: side by side
| ALMU (Aeluma, Inc.) | TLT (iShares 20+ Year Treasury Bond ETF) | |
|---|---|---|
| 1-year return | -32.4% | +0.3% |
| 5-year return | n/a | -34.0% |
| Volatility (ann.) | 106.9% | 13.5% |
| Beta vs S&P 500 | 1.15 | 0.11 |
| Max drawdown (3Y) | -56.7% | -14.8% |
| Market cap | $0.3B | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 4.75% |
| Expense ratio | – | 0.15% |
| Assets under management | – | $41.5B |
| Sector / category | US Listed | ETF · Bonds |
On the fund side, TLT sits in the Long Government category at iShares, with $41.5B under management, a 0.15% expense ratio, a 4.75% trailing dividend yield.
Year-by-year returns
| Year | ALMU | TLT |
|---|---|---|
| 2022 | – | -31.2% |
| 2023 | – | +2.8% |
| 2024 | +163.8% | -8.1% |
| 2025 | +124.4% | +4.2% |
| 2026 | -18.9% | -2.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ALMU and TLT good diversifiers for each other?
By historical standards, yes. A correlation of -0.28 means the two rarely move for the same reasons.
FAQ
What is the correlation between ALMU and TLT?
The ALMU/TLT correlation stands at -0.28 on a 3-year window (1 year: -0.14, 5 years: n/a), computed from weekly returns as of 2026-08-27.
Is TLT a good diversifier for ALMU?
By historical standards, yes. A correlation of -0.28 means the two rarely move for the same reasons.
What does a correlation of -0.28 mean?
A reading of -0.28 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/almu-vs-tlt.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/almu-vs-tlt/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: ALMU correlations · TLT correlations
