Compare/Updated Oct 26, 2026, refreshed every trading day
SPLG vs VOO
SPDR Portfolio S&P 500 ETF against Vanguard S&P 500 ETF: 4 years of returns, risk and today’s technical read, from Kavout’s own data.
SPLG and VOO performed identically over the 944-trading-day period: $1,000 grew to $1,921, a 92.1% total return. SPY lagged slightly, reaching $1,915, or 91.5%. VOO had a narrow edge over SPY across the shorter periods and beat SPY in 28 of the last 45 months, while SPLG beat SPY in 24. SPLG and VOO also had the same 12-month volatility of 12.9% and worst drawdown of -18.7%; SPY’s volatility was also 12.9%, with a slightly worse -18.8% drawdown. The main difference is cost: SPLG’s 0.02% expense ratio was lowest, followed by VOO at 0.03% and SPY at 0.09%. Thus, SPLG and VOO delivered the better long-term result, with SPLG offering the lowest ongoing cost and SPY providing no performance advantage in this comparison.
- Price is above its 200-day average ($78); 50-day at $79.
- RSI 71, overbought. Supertrend says buy. ADX 27, so the trend is strong.
- Price is below its 200-day average ($665); 50-day at $705.
- RSI 42, neutral. Supertrend says sell. ADX 14, so the trend is weak.
Head to head
Which has returned more, SPLG or VOO?
SPLG beat VOO in 20 of the last 45 months; VOO won the other 25. The typical monthly gap was 0.03 points.
Total return by period
Which is riskier?
Both: Feb 19, 2025 to Apr 8, 2025
- 0.999
- correlation of daily moves, 4 years
- 1.00
- SPLG move per 1% in VOO
- 0.998
- correlation, last 12 months
Month by month
Of the last 45 months. The typical gap was 0.03 points.
When did they diverge?
| Month | SPLG | VOO | Gap |
|---|---|---|---|
| November 2024 | +6.0% | +5.9% | +0.11 pts |
| December 2024 | -2.4% | -2.3% | -0.09 pts |
| December 2022 | -5.7% | -5.7% | +0.08 pts |
| August 2022 | -4.0% | -4.1% | +0.08 pts |
Where the numbers come from. 944 daily adjusted closes per fund from the Kavout market-data API, dividends included. Signals and indicators are Kavout’s own, refreshed nightly. Every figure is calculated from those adjusted closes.
Holdings and fees
What do you actually own with SPLG and VOO?
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