SPY vs STI: Correlation
SPDR S&P 500 ETF Trust (SPY) and Solidion Technology, Inc. (STI) show a near-zero relationship: their 3-year correlation of weekly returns is -0.03.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SPY and STI?
Across a 3-year window, the weekly returns of SPY and STI correlate at -0.03, near zero, meaning they move largely independently. The past 12 months show a weaker link (-0.18) than the 3-year average (-0.03). Stretching to 5 years gives -0.02, with an annualized covariance of -213.6 %².
Within SPY's tracked universe of 4755 assets, STI comes in at #4665 by 3-year correlation. Correlation aside, the last 12 months split them widely, with STI ahead by 124.8 points (+20.6% versus +145.4%). Note the risk asymmetry: STI runs 31.6 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.
SPY vs STI: side by side
| SPY (SPDR S&P 500 ETF Trust) | STI (Solidion Technology, Inc.) | |
|---|---|---|
| 1-year return | +20.6% | +145.4% |
| 5-year return | +82.4% | -98.5% |
| Volatility (ann.) | 14.5% | 458.4% |
| Beta vs S&P 500 | 1.00 | -1.02 |
| Max drawdown (3Y) | -18.8% | -99.5% |
| Market cap | – | $0.1B |
| P/E (trailing) | – | – |
| Dividend yield | 1.01% | 0.00% |
| Expense ratio | 0.09% | – |
| Assets under management | $795.3B | – |
| Sector / category | ETF · US Large Cap | US Listed |
SPY, State Street Investment Management's Large Blend fund, carries $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | SPY | STI |
|---|---|---|
| 2022 | -18.2% | – |
| 2023 | +26.2% | -24.1% |
| 2024 | +24.9% | -90.9% |
| 2025 | +17.7% | -79.7% |
| 2026 | +13.7% | +9.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SPY and STI good diversifiers for each other?
Yes. With a correlation of -0.03, SPY and STI have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between SPY and STI?
Using weekly returns as of 2026-08-27: -0.03 over 3 years, with -0.18 over the last year and -0.02 over 5 years.
Is STI a good diversifier for SPY?
Yes. With a correlation of -0.03, SPY and STI have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.03 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/spy-vs-sti.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/spy-vs-sti/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: SPY correlations · STI correlations
