SPY vs TRSG: Correlation
How closely do SPDR S&P 500 ETF Trust (SPY) and Tungray Technologies Inc - Class A (TRSG) trade together? Their weekly returns over three years give a correlation of 0.10, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SPY and TRSG?
Across a 3-year window, the weekly returns of SPY and TRSG correlate at 0.10, weak. Lately the two have drifted apart, with the 1-year correlation at -0.26 versus 0.10 over 3 years. Stretching to 5 years gives n/a, with an annualized covariance of 140.6 %².
By 3-year correlation, TRSG places #4117 of the 4755 assets tracked against SPY. Their recent paths diverged sharply: over the last 12 months SPY outperformed by 28.4 percentage points (+20.6% for SPY against -7.8% for TRSG). One caveat on sizing: TRSG is 6.4 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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 TRSG: side by side
| SPY (SPDR S&P 500 ETF Trust) | TRSG (Tungray Technologies Inc - Class A) | |
|---|---|---|
| 1-year return | +20.6% | -7.8% |
| 5-year return | +82.4% | n/a |
| Volatility (ann.) | 14.5% | 92.3% |
| Beta vs S&P 500 | 1.00 | 0.67 |
| Max drawdown (3Y) | -18.8% | -86.3% |
| Market cap | – | – |
| 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 |
On the fund side, SPY sits in the Large Blend category at State Street Investment Management, with $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | SPY | TRSG |
|---|---|---|
| 2022 | -18.2% | – |
| 2023 | +26.2% | – |
| 2024 | +24.9% | – |
| 2025 | +17.7% | -49.2% |
| 2026 | +13.7% | +36.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SPY and TRSG good diversifiers for each other?
By historical standards, yes. A correlation of 0.10 means the two rarely move for the same reasons.
FAQ
What is the correlation between SPY and TRSG?
As of 2026-08-27, the correlation of weekly returns between SPY and TRSG is 0.10 over 3 years, -0.26 over 1 year and n/a over 5 years.
Is TRSG a good diversifier for SPY?
By historical standards, yes. A correlation of 0.10 means the two rarely move for the same reasons.
What does a correlation of 0.10 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-trsg.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/spy-vs-trsg/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: SPY correlations · TRSG correlations
