Data as of Oct 28, 2026.
IUSG vs VOO: Differences, Returns & Fees
Over the year to Oct 28, 2026, IUSG returned +12.3% to VOO's +13.7%; 67% of their weight is in the same names.
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Net assets: $33.6bn on Oct 27, 2026 for iShares Core S&P U.S. Growth ETF, and $1.0tn on Sep 30, 2026 for Vanguard S&P 500 ETF.
Pair scorecard
VOO costs 0.01 points a year less; their one-year returns differ by 1.4 points; VOO is far larger, $1.0tn against $34.0bn.
| Measure | IUSG | VOO |
|---|---|---|
| Return | ||
| Total return, 1 year | +12.3% | +13.7% |
| Drawdown | ||
| Below its high | 4.1%, high on Oct 6, 2026 | |
| Benchmark | ||
| What it tracks | S&P 900 Growth Index | S&P 500 Index |
| Cost and size | ||
| Expense ratio | 0.04% | 0.03% |
| Net assets, as of Sep 30, 2026 | $34.0bn | $1.0tn |
| Holdings | ||
| Holdings in common | 67% | |
| Top ten holdings, share of the fund | 56.9% | 39.1% |
Holdings in common uses holdings dated Sep 30, 2026 and Oct 27, 2026. Method
Risk and return
Sep 17, 2010 to Oct 23, 2026 · 840 weekly returnsIUSG returned more: +994.3% to +804.0%. VOO swung slightly less: 15.9% to 17.7%. IUSG and VOO fell about the same at their worst: −31.5% and −31.8%.
Full scorecard
9 measures, with how each is measured Open ↓
| Measure | IUSG | VOO | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +994.3% | +804.0% | IUSG | Price change plus distributions, reinvested. |
| Annualized | +16.0% | +14.6% | IUSG (slight) | Total return as a yearly rate. |
| Price return | +805.6% | +575.9% | IUSG | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 17.7% | 15.9% | VOO (slight) | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 11.9% | 10.9% | VOO (slight) | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −31.5% | −31.8% | Tie | Deepest fall from a high to the low after it. |
| Risk-adjusted | ||||
| Sharpe | 0.84 | 0.84 | Tie | Return above Treasury bills per unit of volatility. |
| Sortino | 1.24 | 1.22 | Tie | Return above Treasury bills per unit of downside deviation. |
| Calmar | 0.51 | 0.46 | IUSG (slight) | Annualized return divided by the max drawdown. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 840 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, IUSG and VOO hold 67% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 27, 2026.
half
67% in common
Only in one fund ↓
Side by side
IUSG and VOO on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IUSG and VOO do different jobs. What does each one do in a portfolio?
- What each follows. IUSG follows S&P 900 Growth Index and VOO follows S&P 500 Index.
- Size. IUSG has $34.0bn in net assets and VOO $1.0tn (net assets, as of Sep 30, 2026); VOO is 29.4 times larger.
- Holdings in common (similar). 67% of the weight is in the same securities (holdings dated Oct 27, 2026 and Sep 30, 2026).
Data as of Oct 28, 2026.
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IUSG
IUSG tracks an index. Over the year to Oct 28, 2026 it returned +12.3% with distributions reinvested. The prospectus expense ratio is 0.04% a year. By its holdings published by its issuer for Oct 27, 2026, 95% of the fund by weight is stocks the S&P 500 also holds, across 402 positions, with the top ten at 56.9%. It sat 4.1% below its high of Oct 6, 2026 on Oct 28, 2026.
VOO
VOO tracks the S&P 500. Over the year to Oct 28, 2026 it returned +13.7% with distributions reinvested, against +13.7% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer as of Sep 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 507 positions, with the top ten at 39.1%.
Questions people ask
- Which returned more over the last year, IUSG or VOO?
- In the year to Oct 28, 2026, with distributions reinvested, IUSG returned +12.3% and VOO +13.7%.
- Which is cheaper, IUSG or VOO?
- VOO is cheaper, by 0.01 percentage points a year. That is about $1 on $10,000 held for a year. Fees come from each fund's prospectus.
Links are sources, not endorsements. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
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ETFIQ, IUSG against VOO, data as of Oct 28, 2026. https://etfiq.com/compare/any/iusg-vs-voo
ETFIQ. (Oct 28, 2026). IUSG against VOO. Retrieved from https://etfiq.com/compare/any/iusg-vs-voo
[IUSG against VOO (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/iusg-vs-voo)
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