SPY vs YDKG: Correlation
How closely do SPDR S&P 500 ETF Trust (SPY) and Yueda Digital Holding - Class A (YDKG) trade together? Their weekly returns over three years give a correlation of -0.06, which is near-zero.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SPY and YDKG?
On 3 years of weekly data the SPY/YDKG correlation comes out at -0.06, near zero, meaning they move largely independently. The link has tightened recently: the 1-year correlation (0.10) runs above the 3-year figure (-0.06). The 5-year figure is 0.03, and annualized covariance runs at -135.6 %².
By 3-year correlation, YDKG places #4710 of the 4755 assets tracked against SPY. Correlation aside, the last 12 months split them widely, with SPY ahead by 120.3 points (+20.6% versus -99.7%). Risk is not evenly split, since YDKG carries 10.8 times the volatility of the other side.
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 YDKG: side by side
| SPY (SPDR S&P 500 ETF Trust) | YDKG (Yueda Digital Holding - Class A) | |
|---|---|---|
| 1-year return | +20.6% | -99.7% |
| 5-year return | +82.4% | -99.9% |
| Volatility (ann.) | 14.5% | 156.2% |
| Beta vs S&P 500 | 1.00 | -0.65 |
| Max drawdown (3Y) | -18.8% | -99.9% |
| 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 | YDKG |
|---|---|---|
| 2022 | -18.2% | -81.9% |
| 2023 | +26.2% | -24.5% |
| 2024 | +24.9% | -42.2% |
| 2025 | +17.7% | -98.1% |
| 2026 | +13.7% | +12.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SPY and YDKG good diversifiers for each other?
By historical standards, yes. A correlation of -0.06 means the two rarely move for the same reasons.
FAQ
What is the correlation between SPY and YDKG?
As of 2026-08-27, the correlation of weekly returns between SPY and YDKG is -0.06 over 3 years, 0.10 over 1 year and 0.03 over 5 years.
Is YDKG a good diversifier for SPY?
By historical standards, yes. A correlation of -0.06 means the two rarely move for the same reasons.
What does a correlation of -0.06 mean?
A reading of -0.06 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/spy-vs-ydkg.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/spy-vs-ydkg/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: SPY correlations · YDKG correlations
