IVV vs WEEK
iShares Core S&P 500 ETF vs Roundhill Weekly T-Bill ETF
Quick Verdict
IVV has a lower expense ratio. IVV delivered stronger 1-year returns. IVV offers more diversification with 505 holdings.
Side-by-Side Comparison
| Metric | IVV | WEEK | Winner |
|---|---|---|---|
| Expense Ratio | 0.03% | 0.19% | |
| AUM | $865.2B | $184M | |
| Dividend Yield | 1.09% | 0.93% | |
| Holdings | 508 | 15 | |
| YTD Return | +13.80% | +0.93% | |
| 1Y Return | +23.70% | +2.50% | |
| 3Y Return (annualized) | +21.49% | - | |
| 5Y Return (annualized) | +13.43% | - | |
| Volatility (annualized) | 15.1% | 0.8% | |
| Max Drawdown | -56.5% | -0.1% | |
| Fund Family | iShares by BlackRock (US) | Roundhill Investments | |
| Category | Equity | Fixed Income | |
| Inception | May 15, 2000 | Mar 6, 2025 |
IVV vs WEEK Performance
iShares Core S&P 500 ETF (IVV) is a ETF from iShares by BlackRock (US) and Roundhill Weekly T-Bill ETF (WEEK) is a ETF from Roundhill Investments. Over the past year IVV returned +23.70% while WEEK returned +2.50%. Year to date, IVV is up 13.80% versus a gain of 0.93% for WEEK.
Risk: Volatility and Drawdowns
IVV has been the more volatile fund, with annualized monthly volatility of 15.1% compared with 0.8% for WEEK. 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 -56.5% for IVV and -0.1% for WEEK. 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 -0.06. They move independently enough that combining them can meaningfully diversify a portfolio.
Fees and Cost Over Time
IVV charges 0.03% per year while WEEK charges 0.19%. On a $10,000 position that is $3 vs $19 annually, a gap of $16 per year that compounds over a long holding period. On income, IVV currently yields 1.09% against 0.93% for WEEK.
Holdings Overlap
IVV and WEEK share 0 holdings out of 506 unique holdings combined, representing a 0.0% weight overlap.
Moderate overlap means holding both could provide meaningful diversification benefits.
Frequently Asked Questions
Which is cheaper, IVV or WEEK?
IVV has an expense ratio of 0.03% while WEEK charges 0.19%. IVV is the cheaper option. On a $10,000 investment, that is $16 per year of difference.
Which performed better, IVV or WEEK?
Over the past year IVV returned +23.70% vs +2.50% for WEEK, so IVV leads on 1-year performance. Over the longest common window we track (1 years), IVV annualized +7.05% vs +3.87% for WEEK. Past performance does not guarantee future results.
Which is riskier, IVV or WEEK?
IVV has been the more volatile fund at 15.1% annualized versus 0.8% for WEEK. Worst drawdown: IVV -56.5% vs WEEK -0.1%.
Should I hold both IVV and WEEK?
IVV and WEEK have a monthly-return correlation of -0.06, so combining them can provide real diversification depending on your allocation goals.
What is the holdings overlap between IVV and WEEK?
IVV and WEEK share 0 common holdings with a 0.0% weight overlap. Combined, they hold 506 unique securities.
Which pays a higher dividend, IVV or WEEK?
IVV yields 1.09% while WEEK yields 0.93%, so IVV currently pays the higher dividend yield.
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