DAIO vs SPY: Correlation
Data I/O Corporation (DAIO) and SPDR S&P 500 ETF Trust (SPY) show a weak relationship: their 3-year correlation of weekly returns is 0.25.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DAIO and SPY?
Over the past 3 years, DAIO and SPY moved with a correlation of 0.25, which is weak. Little has changed lately, as the 1-year reading of 0.22 lands near the 3-year figure. Over 5 years the correlation is 0.28, and the annualized covariance of weekly returns is 154.6 %².
By 3-year correlation, SPY places #8 of the 16 assets tracked against DAIO. Their recent paths diverged sharply: over the last 12 months SPY outperformed by 21.3 percentage points (-0.7% for DAIO against +20.6% for SPY). Risk is not evenly split, since DAIO carries 3.0 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.
DAIO vs SPY: side by side
| DAIO (Data I/O Corporation) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -0.7% | +20.6% |
| 5-year return | -48.4% | +82.4% |
| Volatility (ann.) | 43.6% | 14.5% |
| Beta vs S&P 500 | 0.74 | 1.00 |
| Max drawdown (3Y) | -52.9% | -18.8% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 1.01% |
| Expense ratio | – | 0.09% |
| Assets under management | – | $795.3B |
| Sector / category | US Listed | ETF · US Large Cap |
SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | DAIO | SPY |
|---|---|---|
| 2022 | -13.9% | -18.2% |
| 2023 | -25.9% | +26.2% |
| 2024 | -5.8% | +24.9% |
| 2025 | +14.4% | +17.7% |
| 2026 | -6.0% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DAIO and SPY good diversifiers for each other?
Reasonably. At 0.25, DAIO and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between DAIO and SPY?
Using weekly returns as of 2026-08-27: 0.25 over 3 years, with 0.22 over the last year and 0.28 over 5 years.
Is SPY a good diversifier for DAIO?
Reasonably. At 0.25, DAIO and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.25 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.
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Related comparisons
Hubs: DAIO correlations · SPY correlations
