SMSI vs SPY: Correlation
Smith Micro Software, Inc. (SMSI) and SPDR S&P 500 ETF Trust (SPY) show a weak relationship: their 3-year correlation of weekly returns is 0.14.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SMSI and SPY?
On 3 years of weekly data the SMSI/SPY correlation comes out at 0.14, weak. The relationship has been stable: the 1-year correlation (0.09) sits close to the 3-year figure. The 5-year figure is 0.20, and annualized covariance runs at 197.9 %².
Among the 11 assets we track against SMSI, SPY sits near the bottom by co-movement, at rank #8. Their recent paths diverged sharply: over the last 12 months SPY outperformed by 39.5 percentage points (-18.9% for SMSI against +20.6% for SPY). One caveat on sizing: SMSI is 6.5 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.
SMSI vs SPY: side by side
| SMSI (Smith Micro Software, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -18.9% | +20.6% |
| 5-year return | -98.5% | +82.4% |
| Volatility (ann.) | 94.7% | 14.5% |
| Beta vs S&P 500 | 0.95 | 1.00 |
| Max drawdown (3Y) | -96.8% | -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 | SMSI | SPY |
|---|---|---|
| 2022 | -57.3% | -18.2% |
| 2023 | -60.5% | +26.2% |
| 2024 | -80.3% | +24.9% |
| 2025 | -58.8% | +17.7% |
| 2026 | +9.6% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SMSI and SPY good diversifiers for each other?
Yes. With a correlation of 0.14, SMSI and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between SMSI and SPY?
As of 2026-08-27, the correlation of weekly returns between SMSI and SPY is 0.14 over 3 years, 0.09 over 1 year and 0.20 over 5 years.
Is SPY a good diversifier for SMSI?
Yes. With a correlation of 0.14, SMSI and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.14 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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