DTST vs SPY: Correlation
Measured on weekly returns over the past three years, Data Storage Corporation (DTST) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.34, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DTST and SPY?
Over the past 3 years, DTST and SPY moved with a correlation of 0.34, which is moderate. Little has changed lately, as the 1-year reading of 0.29 lands near the 3-year figure. Over 5 years the correlation is 0.29, and the annualized covariance of weekly returns is 277.5 %².
By 3-year correlation, SPY places #6 of the 12 assets tracked against DTST. Correlation aside, the last 12 months split them widely, with SPY ahead by 55.5 points (-34.9% versus +20.6%). Note the risk asymmetry: DTST runs 4.0 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.
DTST vs SPY: side by side
| DTST (Data Storage Corporation) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -34.9% | +20.6% |
| 5-year return | -30.6% | +82.4% |
| Volatility (ann.) | 57.3% | 14.5% |
| Beta vs S&P 500 | 1.33 | 1.00 |
| Max drawdown (3Y) | -62.7% | -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 | DTST | SPY |
|---|---|---|
| 2022 | -51.6% | -18.2% |
| 2023 | +94.6% | +26.2% |
| 2024 | +46.9% | +24.9% |
| 2025 | +21.0% | +17.7% |
| 2026 | -41.6% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DTST and SPY good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.34 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between DTST and SPY?
Using weekly returns as of 2026-08-27: 0.34 over 3 years, with 0.29 over the last year and 0.29 over 5 years.
Is SPY a good diversifier for DTST?
Yes, to a useful degree: a correlation of 0.34 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.34 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: DTST correlations · SPY correlations
