IVV vs SEIS
iShares Core S&P 500 ETF vs SEI Select Small Cap ETF
Which is better, IVV or SEIS?
Large Cap Blend against Small Cap Blend.
IVV has a lower expense ratio. IVV led over 1Y and the full window. SEIS is less concentrated, with 11.1% of the fund in its ten largest positions against 37.8%.
MarketXLS is not an investment adviser. This comparison is generated automatically from market data and is for information only. A Best mark means the better reading on that one measure, not a recommendation to buy.
Side-by-Side Comparison
| Metric | IVV | SEIS |
|---|---|---|
| Expense Ratio | 0.03%Best | 0.55% |
| AUM | $876.4B | $589M |
| Dividend Yield | 1.06% | 0.33% |
| Holdings | 508 | 373 |
| YTD Return | +13.32%Best | +11.37% |
| 1Y Return | +17.08%Best | +11.02% |
| 3Y Return (annualized) | +22.72% | - |
| 5Y Return (annualized) | +13.20% | - |
| Volatility (annualized) | 12.8%Best | 18.7% |
| Max Drawdown | -18.8%Best | -25.7% |
| $10,000 over 2 years | $13,759Best | $12,614 |
| Top 10 Weight | 37.8% | 11.1%Best |
| Fund Family | iShares by BlackRock (US) | SEI EXCHANGE TRADED FUNDS |
| Category | Equity | Equity |
| Style | Large Cap Blend | Small Cap Blend |
| Inception | May 15, 2000 | Oct 8, 2024 |
Volatility and max drawdown, and the $10,000 over 2 years row, are measured over the window both funds cover: Oct 10, 2024 to Sep 23, 2026 (2 years).
IVV vs SEIS growth
Month-end closes. Both lines start at 0% in the first month shown, so the gap between them is the difference in growth across that window. The full view covers the 2 years both funds cover.
IVV vs SEIS Performance
iShares Core S&P 500 ETF (IVV) is an ETF from iShares by BlackRock (US) and SEI Select Small Cap ETF (SEIS) is an ETF from SEI EXCHANGE TRADED FUNDS. Over the past year IVV returned +17.08% while SEIS returned +11.02%. Year to date, IVV is up 13.32% versus a gain of 11.37% for SEIS.
Past performance does not guarantee future results.
Risk: Volatility and Drawdowns
SEIS has been the more volatile fund, with annualized monthly volatility of 18.7% compared with 12.8% for IVV. 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 -18.8% for IVV and -25.7% for SEIS. Drawdown depth is what each fund did in the worst stretch of the window measured above.
The two funds' monthly returns correlate at 0.78. They usually move together, but the gap leaves some room for diversification.
Fees and Cost Over Time
IVV charges 0.03% per year while SEIS charges 0.55%. On a $10,000 position that is $3 vs $55 annually, a gap of $52 per year that compounds over a long holding period. On income, IVV currently yields 1.06% against 0.33% for SEIS.
Holdings Overlap
0.6% of IVV's money is in holdings SEIS also owns. 3.0% of SEIS's money is in holdings IVV also owns.
SEIS and IVV share little of their money.
10 positions in common, counted across the 490 positions we hold weights for in IVV and 375 in SEIS, against full books of 508 and 373.
What only one of them owns
Our book lists 346 positions for SEIS that do not appear in our book for IVV (91.2% of the fund), and 472 for IVV that do not appear in SEIS (98.1%).
Some of those will be the same company recorded under a different code in one of the two books, so the real difference in what you would own is no larger than this and may be smaller. We do not name the individual positions here for that reason.
Top Shared Holdings
| Stock | Weight in IVV | Weight in SEIS | Difference |
|---|---|---|---|
| KEYSKeysight Technologies Inc. | 0.08% | 0.67% | 0.59% |
| FTNTFortinet Inc | 0.16% | 0.34% | 0.18% |
| AXONAxon Enterprise Inc | 0.07% | 0.42% | 0.35% |
| MPWRMonolithic Power Systems Inc | 0.09% | 0.34% | 0.25% |
| CHDChurch & Dwight Co. Inc. | 0.04% | 0.29% | 0.25% |
| TYLTyler Technologies Inc | 0.02% | 0.30% | 0.28% |
| ROLRollins Inc. | 0.02% | 0.22% | 0.20% |
| FICOFair Isaac Corp. | 0.04% | 0.18% | 0.14% |
| CPRTCopart Inc | 0.04% | 0.11% | 0.07% |
| CSGPCostar Group Inc. | 0.02% | 0.12% | 0.10% |
You are not choosing between two funds in isolation.
Whichever of IVV and SEIS you pick has to sit alongside everything else you own. Add the rest and see what the combination actually holds.
Free for up to 10 holdings. No account needed.
Frequently Asked Questions
Which is cheaper, IVV or SEIS?
IVV has an expense ratio of 0.03% while SEIS charges 0.55%. IVV is the cheaper option, by $52 a year on a $10,000 investment.
Which performed better, IVV or SEIS?
Over the past year IVV returned +17.08% vs +11.02% for SEIS, so IVV leads on 1-year performance. Over the longest common window we track (2 years), IVV annualized +17.30% vs +12.31% for SEIS. Past performance does not guarantee future results. This is information, not a recommendation.
Which is riskier, IVV or SEIS?
SEIS has been the more volatile fund at 18.7% annualized versus 12.8% for IVV. Worst drawdown: IVV -18.8% vs SEIS -25.7%.
Should I hold both IVV and SEIS?
IVV and SEIS have a monthly-return correlation of 0.78, so their returns are far enough apart for the mix to behave differently from either one alone. This is information, not a recommendation.
What is the holdings overlap between IVV and SEIS?
3.0% of SEIS's money is in holdings IVV also owns. 3.0% of SEIS's is in holdings IVV also owns. They hold 10 positions in common, counted across the 490 positions we hold weights for in IVV and 375 in SEIS.
Which pays a higher dividend, IVV or SEIS?
IVV yields 1.06% while SEIS yields 0.33%, so IVV currently pays the higher dividend yield.
Is SEIS better than IVV?
IVV has a lower expense ratio. IVV led over 1Y and the full window. SEIS is less concentrated, with 11.1% of the fund in its ten largest positions against 37.8%. Which one suits a particular account depends on what it is for. This is information, not a recommendation.