IGOV vs VOO
iShares International Treasury Bond ETF vs Vanguard S&P 500 ETF
Quick Verdict
VOO has a lower expense ratio. VOO delivered stronger 1-year returns. VOO offers more diversification with 505 holdings.
Side-by-Side Comparison
| Metric | IGOV | VOO | Winner |
|---|---|---|---|
| Expense Ratio | 0.35% | 0.03% | |
| AUM | $1.5B | $979.0B | |
| Dividend Yield | 1.43% | 1.09% | |
| Holdings | 970 | 509 | |
| YTD Return | -0.99% | +13.72% | |
| 1Y Return | -1.16% | +21.63% | |
| 3Y Return (annualized) | +2.80% | +21.55% | |
| 5Y Return (annualized) | -4.36% | +13.26% | |
| Volatility (annualized) | 8.7% | 14.1% | |
| Max Drawdown | -35.9% | -34.3% | |
| Fund Family | iShares by BlackRock (US) | Vanguard (US) | |
| Category | Fixed Income | Equity | |
| Inception | Jan 21, 2009 | Sep 7, 2010 |
IGOV vs VOO Performance
iShares International Treasury Bond ETF (IGOV) is a ETF from iShares by BlackRock (US) and Vanguard S&P 500 ETF (VOO) is a ETF from Vanguard (US). Over the past year IGOV returned -1.16% while VOO returned +21.63%. Year to date, IGOV is down 0.99% versus a gain of 13.72% for VOO.
Over three years, IGOV compounded at +2.80% per year against +21.55% for VOO; over five years the annualized figures are -4.36% and +13.26% respectively. Across the full 16-year window we track, VOO has the edge at +13.56% annualized vs +0.07%. Past performance does not guarantee future results.
Risk: Volatility and Drawdowns
VOO has been the more volatile fund, with annualized monthly volatility of 14.1% compared with 8.7% for IGOV. 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 -35.9% for IGOV 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 0.43. They move independently enough that combining them can meaningfully diversify a portfolio.
Fees and Cost Over Time
IGOV charges 0.35% per year while VOO charges 0.03%. On a $10,000 position that is $35 vs $3 annually, a gap of $32 per year that compounds over a long holding period. On income, IGOV currently yields 1.43% against 1.09% for VOO.
Holdings Overlap
IGOV and VOO share 0 holdings out of 543 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, IGOV or VOO?
IGOV has an expense ratio of 0.35% while VOO charges 0.03%. VOO is the cheaper option. On a $10,000 investment, that is $32 per year of difference.
Which performed better, IGOV or VOO?
Over the past year IGOV returned -1.16% vs +21.63% for VOO, so VOO leads on 1-year performance. Over the longest common window we track (16 years), IGOV annualized +0.07% vs +13.56% for VOO. Past performance does not guarantee future results.
Which is riskier, IGOV or VOO?
VOO has been the more volatile fund at 14.1% annualized versus 8.7% for IGOV. Worst drawdown: IGOV -35.9% vs VOO -34.3%.
Should I hold both IGOV and VOO?
IGOV and VOO have a monthly-return correlation of 0.43, so combining them can provide real diversification depending on your allocation goals.
What is the holdings overlap between IGOV and VOO?
IGOV and VOO share 0 common holdings with a 0.0% weight overlap. Combined, they hold 543 unique securities.
Which pays a higher dividend, IGOV or VOO?
IGOV yields 1.43% while VOO yields 1.09%, so IGOV currently pays the higher dividend yield.
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