Data as of Oct 28, 2026.
IWM vs VIOG: Differences, Returns & Fees
Over the year to Oct 28, 2026, IWM returned +14.1% to VIOG's +15.8%; 32% of their weight is in the same names.
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Net assets: $75.5bn on Oct 27, 2026 for iShares Russell 2000 ETF, and $1.0bn on Sep 30, 2026 for Vanguard S&P Small-Cap 600 Growth ETF.
Pair scorecard
VIOG costs 0.09 points a year less; their one-year returns differ by 1.7 points; IWM is far larger, $78.0bn against $1.0bn.
| Measure | IWM | VIOG |
|---|---|---|
| Return | ||
| Total return, 1 year | +14.1% | +15.8% |
| Drawdown | ||
| Below its high | 7.6%, high on Aug 14, 2026 | 8.2%, high on Aug 4, 2026 |
| Benchmark | ||
| What it tracks | Russell 2000 Index | S&P SmallCap 600 Growth Index |
| Cost and size | ||
| Expense ratio | 0.19% | 0.10% |
| Net assets, as of Sep 30, 2026 | $78.0bn | $1.0bn |
| Holdings | ||
| Holdings in common | 32% | |
| Top ten holdings, share of the fund | 3.3% | 9.9% |
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 returnsEach against its own benchmark: IWM against VTWO, Oct 1, 2010 to Oct 23, 2026; VIOG against IJT, Sep 17, 2010 to Oct 23, 2026.
VIOG returned more: +527.1% to +426.5%. VIOG swung slightly less: 20.5% to 21.2%. IWM fell slightly less at its worst: −40.2% to −41.3%.
Full scorecard
19 measures, with how each is measured Open ↓
| Measure | IWM | VIOG | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +426.5% | +527.1% | VIOG | Price change plus distributions, reinvested. |
| Annualized | +10.8% | +12.0% | VIOG | Total return as a yearly rate. |
| Price return | +322.9% | +438.4% | VIOG | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 21.2% | 20.5% | VIOG (slight) | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 14.6% | 13.9% | VIOG (slight) | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −40.2% | −41.3% | IWM (slight) | Deepest fall from a high to the low after it. |
| Upside capture | 101.0% | 98.9% | Share of its benchmark's rise caught in the weeks it rose. | |
| Downside capture | 100.5% | 99.5% | Share of its benchmark's fall taken in the weeks it fell. Lower is better. | |
| Beta | 1.01 | 0.99 | Not an edge | How far it moves for each 1% its benchmark moves. |
| R squared | 1.00 | 0.99 | Not an edge | Share of its weekly moves its benchmark explains. |
| Risk-adjusted | ||||
| Sharpe | 0.52 | 0.58 | VIOG | Return above Treasury bills per unit of volatility. |
| Sortino | 0.75 | 0.85 | VIOG | Return above Treasury bills per unit of downside deviation. |
| Treynor | 0.106 | 0.120 | Return above Treasury bills per unit of beta. | |
| Calmar | 0.27 | 0.29 | VIOG (slight) | Annualized return divided by the max drawdown. |
| Against the benchmark | ||||
| Benchmark | VTWO | IJT | The ETF each fund is measured against. | |
| Alpha | −0.1% a year | +0.2% a year | Not significant | Yearly return beyond what its beta to the benchmark predicts. |
| Alpha t-stat | −0.36 | 0.29 | Not an edge | How sure the alpha is. Below 2, it could be chance. |
| Alpha range | −0.6% to +0.4% | −0.9% to +1.2% | Includes zero | The 95% range for the yearly alpha. |
| Information ratio | −0.02 | 0.01 | Return against its benchmark per unit of tracking error. | |
| Tracking error | 1.0% | 2.1% | Not an edge | How far weekly returns stray from the benchmark, annualized. |
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, IWM and VIOG hold 32% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 27, 2026.
half
32% in common
Only in one fund ↓
Side by side
IWM and VIOG on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IWM and VIOG are built for the same job. How do they differ in cost, holdings and results?
- What each follows. IWM follows Russell 2000 Index and VIOG follows S&P SmallCap 600 Growth Index.
- Holdings in common. 32% of the weight is in the same securities (holdings dated Oct 27, 2026 and Sep 30, 2026).
- Number of holdings. IWM holds 1,977 positions and VIOG holds 351.
Data as of Oct 28, 2026.
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IWM
IWM tracks the Russell 2000. Over the year to Oct 28, 2026 it returned +14.1% with distributions reinvested, against +14.3% for its benchmark, the Russell 2000 Index. The prospectus expense ratio is 0.19% a year. By its holdings published by its issuer for Oct 27, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 1,977 positions, with the top ten at 3.3%. It sat 7.6% below its high of Aug 14, 2026 on Oct 28, 2026.
VIOG
VIOG tracks an index. Over the year to Oct 28, 2026 it returned +15.8% with distributions reinvested, against +15.4% for its benchmark, the S&P SmallCap 600 Growth Index. The prospectus expense ratio is 0.10% a year. By its holdings published by its issuer as of Sep 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 351 positions, with the top ten at 9.9%. It sat 8.2% below its high of Aug 4, 2026 on Oct 28, 2026.
Questions people ask
- Which returned more over the last year, IWM or VIOG?
- In the year to Oct 28, 2026, with distributions reinvested, IWM returned +14.1% and VIOG +15.8%.
- Which is cheaper, IWM or VIOG?
- VIOG is cheaper, by 0.09 percentage points a year. That is about $9 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, IWM against VIOG, data as of Oct 28, 2026. https://etfiq.com/compare/any/iwm-vs-viog
ETFIQ. (Oct 28, 2026). IWM against VIOG. Retrieved from https://etfiq.com/compare/any/iwm-vs-viog
[IWM against VIOG (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/iwm-vs-viog)
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