Compare/Updated Oct 26, 2026, refreshed every trading day
IVV vs VOO
iShares Core 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 best over the period, turning $1,000 into $2,065 (+106.5%), narrowly ahead of IVV at $2,064 (+106.4%) and SPY at $2,052 (+105.2%). VOO also led over three years (+83.6% versus IVV’s +83.5% and SPY’s +82.7%) and had the strongest one-, three-, and six-month results among the three, while IVV and VOO matched on one-year and YTD returns. The differences are small because all three track the S&P 500 closely: correlations were 0.998–0.999 and 12-month volatility was identical at 12.7%. VOO and IVV also have the lowest expense ratio at 0.03%, versus SPY’s 0.09%, which helps explain their modest long-term edge. VOO’s worst drawdown was slightly better at -18.7%, compared with -18.8% for IVV and SPY.
- Price is above its 200-day average ($727); 50-day at $770.
- RSI 42, neutral. Supertrend says sell. ADX 14, so the trend is weak.
- Price is above 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, IVV or VOO?
IVV beat VOO in 25 of the last 48 months; VOO won the other 23. 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
- IVV move per 1% in VOO
- 0.999
- correlation, last 12 months
Month by month
Of the last 48 months. The typical gap was 0.03 points.
When did they diverge?
| Month | IVV | VOO | Gap |
|---|---|---|---|
| June 2026 | -1.2% | -1.0% | -0.24 pts |
| July 2026 | +0.2% | -0.0% | +0.21 pts |
| May 2025 | +6.1% | +6.3% | -0.15 pts |
| April 2025 | -0.7% | -0.8% | +0.11 pts |
Where the numbers come from. 1000 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 IVV 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 IVV and VOO to a watchlist and Kavout emails you when a signal flips or a price target is hit.
Free account, no card