Data as of Oct 28, 2026.
ITOT vs VOO: Differences, Returns & Fees
Over the year to Oct 28, 2026, ITOT returned +13.4% to VOO's +13.7%; 89% of their weight is in the same names.
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Net assets: $97.1bn on Oct 27, 2026 for iShares Core S&P Total U.S. Stock Market ETF, and $1.0tn on Sep 30, 2026 for Vanguard S&P 500 ETF.
Pair scorecard
Both cost 0.03% a year; their one-year returns differ by 0.3 points; VOO is 10.4 times larger.
Points (pts) are percentage points.
| Measure | ITOT | VOO |
|---|---|---|
| Return | ||
| Total return, 1 year | +13.4% | +13.7% |
| Benchmark | ||
| What it tracks | S&P Total Market Index (TMI) | S&P 500 Index |
| Cost and size | ||
| Expense ratio | 0.03% | 0.03% |
| Net assets, as of Sep 30, 2026 | $95.9bn | $1.0tn |
| Holdings | ||
| Holdings in common | 89% | |
| Top ten holdings, share of the fund | 33.9% | 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 returnsVOO returned slightly more: +804.0% to +752.8%. VOO swung slightly less: 15.9% to 16.3%. VOO fell slightly less at its worst: −31.8% to −33.2%.
Full scorecard
9 measures, with how each is measured Open ↓
| Measure | ITOT | VOO | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +752.8% | +804.0% | VOO (slight) | Price change plus distributions, reinvested. |
| Annualized | +14.2% | +14.6% | VOO (slight) | Total return as a yearly rate. |
| Price return | +546.9% | +575.9% | VOO (slight) | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 16.3% | 15.9% | VOO (slight) | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 11.2% | 10.9% | VOO (slight) | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −33.2% | −31.8% | VOO (slight) | Deepest fall from a high to the low after it. |
| Risk-adjusted | ||||
| Sharpe | 0.80 | 0.84 | VOO (slight) | Return above Treasury bills per unit of volatility. |
| Sortino | 1.16 | 1.22 | VOO (slight) | Return above Treasury bills per unit of downside deviation. |
| Calmar | 0.43 | 0.46 | VOO (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, ITOT and VOO hold 89% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 27, 2026.
half
89% in common
Only in one fund ↓
Side by side
ITOT and VOO on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
ITOT and VOO are built for the same job. How do they differ in cost, holdings and results?
- What each follows. ITOT follows S&P Total Market Index (TMI) and VOO follows S&P 500 Index.
- Number of holdings. ITOT holds 2,443 positions and VOO holds 507.
- Size. ITOT has $95.9bn in net assets and VOO $1.0tn (net assets, as of Sep 30, 2026); VOO is 10.4 times larger.
Data as of Oct 28, 2026.
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ITOT
ITOT tracks the S&P Total U.S. Stock Market. Over the year to Oct 28, 2026 it returned +13.4% with distributions reinvested. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer for Oct 27, 2026, 88% of the fund by weight is stocks the S&P 500 also holds, across 2,443 positions, with the top ten at 33.9%.
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. 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
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, ITOT against VOO, data as of Oct 28, 2026. https://etfiq.com/compare/any/itot-vs-voo
ETFIQ. (Oct 28, 2026). ITOT against VOO. Retrieved from https://etfiq.com/compare/any/itot-vs-voo
[ITOT against VOO (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/itot-vs-voo)
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