SPFF vs. VOO
SPFF (Global X SuperIncome Preferred ETF) and VOO (Vanguard S&P 500 ETF) are both exchange-traded funds - SPFF is a Preferred Stock/Convertible Bonds fund tracking the S&P Enhanced Yield North American Preferred Stock Index, while VOO is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 10 years, SPFF returned 3.11%/yr vs 15.77%/yr for VOO. At a 0.48 correlation, their price movements are largely independent. SPFF charges 0.58%/yr vs 0.03%/yr for VOO.
Performance
SPFF vs. VOO - Performance Comparison
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Returns By Period
In the year-to-date period, SPFF achieves a 5.25% return, which is significantly lower than VOO's 9.75% return. Over the past 10 years, SPFF has underperformed VOO with an annualized return of 3.11%, while VOO has yielded a comparatively higher 15.77% annualized return.
SPFF
- 1D
- -0.52%
- 1M
- 1.66%
- YTD
- 5.25%
- 6M
- 4.12%
- 1Y
- 16.51%
- 3Y*
- 9.03%
- 5Y*
- 1.77%
- 10Y*
- 3.11%
VOO
- 1D
- -0.29%
- 1M
- 0.08%
- YTD
- 9.75%
- 6M
- 9.30%
- 1Y
- 26.77%
- 3Y*
- 21.36%
- 5Y*
- 13.58%
- 10Y*
- 15.77%
SPFF vs. VOO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
SPFF Global X SuperIncome Preferred ETF | 5.25% | 7.52% | 8.62% | 3.00% | -14.29% | 5.15% | 6.91% | 13.04% | -2.55% | 1.80% |
VOO Vanguard S&P 500 ETF | 9.75% | 17.82% | 24.98% | 26.32% | -18.17% | 28.79% | 18.32% | 31.37% | -4.50% | 21.77% |
Correlation
The correlation between SPFF and VOO is 0.71, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.71 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.56 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.57 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.52 |
Correlation (All Time) Calculated using the full available price history since Jul 19, 2012 | 0.48 |
Over the past year, SPFF and VOO have become more correlated (0.71) than their long-term average of 0.48, meaning their price movements have been converging.
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Return for Risk
SPFF vs. VOO — Risk / Return Rank
SPFF
VOO
SPFF vs. VOO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Global X SuperIncome Preferred ETF (SPFF) and Vanguard S&P 500 ETF (VOO). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| SPFF | VOO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.50 | ||
| Sortino ratioReturn per unit of downside risk | -0.57 | ||
| Omega ratioGain probability vs. loss probability | 1.29 | 1.39 | -0.11 |
| Calmar ratioReturn relative to maximum drawdown | 2.19 | 3.02 | -0.83 |
| Martin ratioReturn relative to average drawdown | 6.59 | 13.58 | -6.99 |
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Drawdowns
SPFF vs. VOO - Drawdown Comparison
The maximum SPFF drawdown since its inception was -35.92%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for SPFF and VOO.
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Drawdown Indicators
| SPFF | VOO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -35.92% | -33.99% | -1.93% |
Max Drawdown (1Y)Largest decline over 1 year | -7.58% | -8.90% | +1.32% |
Max Drawdown (3Y)Largest decline over 3 years | -12.51% | -18.69% | +6.18% |
Max Drawdown (5Y)Largest decline over 5 years | -22.88% | -24.52% | +1.64% |
Max Drawdown (10Y)Largest decline over 10 years | -35.92% | -33.99% | -1.93% |
Current DrawdownCurrent decline from peak | -1.75% | -1.74% | -0.01% |
Average DrawdownAverage peak-to-trough decline | -4.05% | -3.68% | -0.37% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.51% | 1.98% | +0.53% |
Volatility
SPFF vs. VOO - Volatility Comparison
The current volatility for Global X SuperIncome Preferred ETF (SPFF) is 3.60%, while Vanguard S&P 500 ETF (VOO) has a volatility of 4.60%. This indicates that SPFF experiences smaller price fluctuations and is considered to be less risky than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SPFF | VOO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 3.60% | 4.60% | -1.00% |
Volatility (6M)Calculated over the trailing 6-month period | 7.70% | 9.73% | -2.03% |
Volatility (1Y)Calculated over the trailing 1-year period | 9.96% | 12.39% | -2.43% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 11.02% | 16.90% | -5.88% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 13.54% | 18.05% | -4.51% |
SPFF vs. VOO - Expense Ratio Comparison
SPFF has a 0.58% expense ratio, which is higher than VOO's 0.03% expense ratio.
Dividends
SPFF vs. VOO - Dividend Comparison
SPFF's dividend yield for the trailing twelve months is around 6.44%, more than VOO's 1.04% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
SPFF Global X SuperIncome Preferred ETF | 6.44% | 6.47% | 6.39% | 6.64% | 7.15% | 5.78% | 5.75% | 5.97% | 7.60% | 7.24% | 7.04% | 7.50% |
VOO Vanguard S&P 500 ETF | 1.04% | 1.13% | 1.24% | 1.46% | 1.69% | 1.25% | 1.54% | 1.88% | 2.06% | 1.78% | 2.02% | 2.10% |
Frequently Asked Questions
SPFF and VOO have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
VOO has higher volatility (4.60%) compared to SPFF (3.60%). In terms of maximum drawdown, SPFF dropped -35.92% vs VOO's -33.99%.
On 10-year performance, VOO leads with 15.77% vs 3.11% for SPFF. On fees, VOO is cheaper at 0.03% per year. On volatility, SPFF has been the lower-risk option at 3.60%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, VOO has performed better with a 15.77% return vs 3.11%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
VOO is cheaper with a 0.03% expense ratio, compared with 0.58% for SPFF.
SPFF has the higher dividend yield at 6.44%, compared with 1.04% for VOO.
SPFF is categorized as Preferred Stock/Convertible Bonds, while VOO is S&P 500. SPFF tracks S&P Enhanced Yield North American Preferred Stock Index, while VOO tracks S&P 500 Index. They also come from different issuers: Global X and Vanguard. Their fees differ too: 0.58% for SPFF and 0.03% for VOO.
VOO currently has the higher Sharpe Ratio (2.17 vs 1.67), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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