SEIS vs VOO
SEI Select Small Cap ETF vs Vanguard S&P 500 ETF
Quick Verdict
VOO has a lower expense ratio. SEIS delivered stronger 1-year returns. VOO offers more diversification with 505 holdings.
Side-by-Side Comparison
| Metric | SEIS | VOO | Winner |
|---|---|---|---|
| Expense Ratio | 0.55% | 0.03% | |
| AUM | $574M | $979.0B | |
| Dividend Yield | 0.36% | 1.09% | |
| Holdings | 346 | 509 | |
| YTD Return | +18.05% | +13.44% | |
| 1Y Return | +28.46% | +22.62% | |
| 3Y Return (annualized) | - | +21.47% | |
| 5Y Return (annualized) | - | +13.27% | |
| Volatility (annualized) | 18.8% | 14.1% | |
| Max Drawdown | -25.7% | -34.3% | |
| Fund Family | SEI EXCHANGE TRADED FUNDS | Vanguard (US) | |
| Category | Equity | Equity | |
| Inception | Oct 8, 2024 | Sep 7, 2010 |
SEIS vs VOO Performance
SEI Select Small Cap ETF (SEIS) is a ETF from SEI EXCHANGE TRADED FUNDS and Vanguard S&P 500 ETF (VOO) is a ETF from Vanguard (US). Over the past year SEIS returned +28.46% while VOO returned +22.62%. Year to date, SEIS is up 18.05% versus a gain of 13.44% for VOO.
Risk: Volatility and Drawdowns
SEIS has been the more volatile fund, with annualized monthly volatility of 18.8% compared with 14.1% for VOO. Lower volatility generally means a smoother ride, though it often comes with lower long-run returns.
The deepest peak-to-trough decline in our data was -25.7% for SEIS and -34.3% for VOO. Drawdown depth is worth weighing if you expect to sell during market stress rather than ride it out.
The two funds' monthly returns correlate at 0.79. They usually move together, but the gap leaves some room for diversification.
Fees and Cost Over Time
SEIS charges 0.55% per year while VOO charges 0.03%. On a $10,000 position that is $55 vs $3 annually, a gap of $52 per year that compounds over a long holding period. On income, SEIS currently yields 0.36% against 1.09% for VOO.
Holdings Overlap
SEIS and VOO share 10 holdings out of 860 unique holdings combined, representing a 0.6% weight overlap.
Moderate overlap means holding both could provide meaningful diversification benefits.
Frequently Asked Questions
Which is cheaper, SEIS or VOO?
SEIS has an expense ratio of 0.55% while VOO charges 0.03%. VOO is the cheaper option. On a $10,000 investment, that is $52 per year of difference.
Which performed better, SEIS or VOO?
Over the past year SEIS returned +28.46% vs +22.62% for VOO, so SEIS leads on 1-year performance. Over the longest common window we track (2 years), SEIS annualized +16.80% vs +13.55% for VOO. Past performance does not guarantee future results.
Which is riskier, SEIS or VOO?
SEIS has been the more volatile fund at 18.8% annualized versus 14.1% for VOO. Worst drawdown: SEIS -25.7% vs VOO -34.3%.
Should I hold both SEIS and VOO?
SEIS and VOO have a monthly-return correlation of 0.79, so combining them can provide real diversification depending on your allocation goals.
What is the holdings overlap between SEIS and VOO?
SEIS and VOO share 10 common holdings with a 0.6% weight overlap. Combined, they hold 860 unique securities.
Which pays a higher dividend, SEIS or VOO?
SEIS yields 0.36% while VOO yields 1.09%, so VOO currently pays the higher dividend yield.
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