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.
VOO did marginally better recently, leading SPLG by 0.3 percentage points over one month, while both delivered identical returns over three months, six months, YTD, one year, three years, and the full period from July 19, 2022 to April 24, 2026: $1,921 from $1,000, or +92.1%. Their risk profiles were also identical, with 12.9% volatility over the last 12 months and a worst drawdown of 18.7% from February 19, 2025 to April 8, 2025. The funds moved almost in lockstep, with 0.999 daily correlation. SPLG’s 0.02% expense ratio is 0.01 percentage points lower than VOO’s 0.03%, while VOO is substantially larger at $1,671B versus SPLG’s $102B. The practical difference is therefore minimal: SPLG offers slightly lower fees; VOO had the recent edge and greater scale.
- 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?
Go deeper
Ask InvestGPT which one fits your portfolio.
Eight research agents read your holdings, the overlap and the tax side, then answer in plain words. Free accounts get one report a month.
More comparisons
Find another comparison.
Track both, get told when something changes.
Add SPLG and VOO to a watchlist and Kavout emails you when a signal flips or a price target is hit.
Free account, no card