IQI vs SPY: Correlation
Measured on weekly returns over the past three years, Invesco Quality Municipal Income Trust (IQI) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.38, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IQI and SPY?
On 3 years of weekly data the IQI/SPY correlation comes out at 0.38, moderate. The link has tightened recently: the 1-year correlation (0.52) runs above the 3-year figure (0.38). The 5-year figure is 0.46, and annualized covariance runs at 64.5 %².
SPY is close to the least connected end of IQI's tracked universe, ranking #23 of 27. Twelve-month performance is nearly a tie, at +16.7% for IQI and +20.6% for SPY.
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.
IQI vs SPY: side by side
| IQI (Invesco Quality Municipal Income Trust) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +16.7% | +20.6% |
| 5-year return | +1.1% | +82.4% |
| Volatility (ann.) | 11.8% | 14.5% |
| Beta vs S&P 500 | 0.31 | 1.00 |
| Max drawdown (3Y) | -11.2% | -18.8% |
| Market cap | – | – |
| P/E (trailing) | 29.9 | – |
| Dividend yield | 7.50% | 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 | IQI | SPY |
|---|---|---|
| 2022 | -26.9% | -18.2% |
| 2023 | +5.9% | +26.2% |
| 2024 | +10.5% | +24.9% |
| 2025 | +9.2% | +17.7% |
| 2026 | +7.1% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IQI and SPY good diversifiers for each other?
Reasonably. At 0.38, IQI and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between IQI and SPY?
Using weekly returns as of 2026-08-27: 0.38 over 3 years, with 0.52 over the last year and 0.46 over 5 years.
Is SPY a good diversifier for IQI?
Reasonably. At 0.38, IQI and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.38 mean?
A reading of 0.38 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: IQI correlations · SPY correlations
