IDAI vs SPY: Correlation
How closely do T Stamp Inc. (IDAI) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of -0.03, which is near-zero.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IDAI and SPY?
Over the past 3 years, IDAI and SPY moved with a correlation of -0.03, which is near zero, meaning they move largely independently. Lately the two have moved closer together, with the 1-year correlation at 0.26 versus -0.03 over 3 years. Over 5 years the correlation is -0.00, and the annualized covariance of weekly returns is -211.4 %².
Among the 36 assets we track against IDAI, SPY ranks #16 by 3-year correlation. On 12-month performance SPY holds a 5.1-point edge, +15.5% against +20.6%. Risk is not evenly split, since IDAI carries 34.9 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.
IDAI vs SPY: side by side
| IDAI (T Stamp Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +15.5% | +20.6% |
| 5-year return | -76.5% | +82.4% |
| Volatility (ann.) | 505.7% | 14.5% |
| Beta vs S&P 500 | -1.01 | 1.00 |
| Max drawdown (3Y) | -92.9% | -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 | IDAI | SPY |
|---|---|---|
| 2022 | -88.0% | -18.2% |
| 2023 | -43.0% | +26.2% |
| 2024 | -35.5% | +24.9% |
| 2025 | +342.8% | +17.7% |
| 2026 | -14.3% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IDAI and SPY good diversifiers for each other?
By historical standards, yes. A correlation of -0.03 means the two rarely move for the same reasons.
FAQ
What is the correlation between IDAI and SPY?
The IDAI/SPY correlation stands at -0.03 on a 3-year window (1 year: 0.26, 5 years: -0.00), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for IDAI?
By historical standards, yes. A correlation of -0.03 means the two rarely move for the same reasons.
What does a correlation of -0.03 mean?
On the −1 to +1 scale, -0.03 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
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Related comparisons
Hubs: IDAI correlations · SPY correlations
