Registry rank 1013 · Portfolio as of 2026-02-28
VANGUARD S&P SMALL-CAP 600 INDEX FUND
VIOO (Vanguard S&P Small-Cap 600 Index Fund) · VSMSX (Vanguard S&P Small-Cap 600 Index Fund)
The verdict
What the numbers say
91.0% of this portfolio matches the S&P SmallCap 600, which costs $30 a year per $100,000 to own outright. This fund charges $70 a year.
Data provenance
Run 363649da-fcfb-4007-87ef-de06de7710ca; method closet-index@2.0.0; fund accession 0000891190-26-000137; comparison periods and expense-filing links appear with their figures. Machine capture time: 2026-07-29T14:22:09.616Z.
Computed rule checks
1 warning · 1 check clear · 1 unavailable
Check clear
· Rule 1
The fund’s filed benchmark and its closest approved index control point to the same comparison.
Methodology rule · visual rules si-visual-explainers@1.0.0
Warning
· Rule 2
91.0% of this portfolio matches the S&P SmallCap 600, which costs $30 a year per $100,000 to own outright. This fund charges $70 a year.
Methodology rule · visual rules si-visual-explainers@1.0.0
Unavailable
· Rule 3
No complete licensed window and filed headline fee are available together for this check.
Computed on licensed market-return history · filed fee as of 2025-08-31
Methodology rule · visual rules si-visual-explainers@1.0.0
Filed fees in dollars
SEC-convention illustration
Computed from SEC filings
Assumptions for each dollar figure: $100,000 starting amount · 5.0% annual return · annual compounding · fees deducted annually · 0.01% computed index-control baseline. Methodology.
| Share class and filing | 10 years | 20 years | 30 years |
|---|---|---|---|
| VIOO0.07% · SEC expense filing · as of 2025-08-31 | $928 | $3,010 | $7,328 |
| VSMSX0.03% · SEC expense filing · as of 2025-08-31 | $310 | $1,007 | $2,456 |
Real trailing windows
Computed on licensed market-return history
Trailing windows use iShares Core S&P Small-Cap ETF (IJR) adjusted-close total-return history through 2026-07-29 and the same filed index-control fee baseline as the convention table. Methodology.
| Share class and filing | 10 years | 20 years | 30 years |
|---|---|---|---|
| VIOOFiled fee as of 2025-08-31 | $1,491Computed on licensed market-return history 2016-07-29 to 2026-07-29 · proxy return 10.68% annualized | $6,920Computed on licensed market-return history 2006-07-31 to 2026-07-29 · proxy return 9.70% annualized | Proxy history begins 2000 — no full 30-year window |
| VSMSXFiled fee as of 2025-08-31 | $498Computed on licensed market-return history 2016-07-29 to 2026-07-29 · proxy return 10.68% annualized | $2,315Computed on licensed market-return history 2006-07-31 to 2026-07-29 · proxy return 9.70% annualized | Proxy history begins 2000 — no full 30-year window |
Index-control tracking difference
Annualized fund NAV return minus the matched proxy return. Positive means the fund NAV return was higher over that window.
| Fund NAV class | 10 years | 20 years | 30 years |
|---|---|---|---|
| VIOO | fund NAV history unavailable for VIOO | fund NAV history unavailable for VIOO | fund NAV history unavailable for VIOO |
| VSMSX | no exact shared fund NAV/proxy anchors for a full 10-year window | no exact shared fund NAV/proxy anchors for a full 20-year window | no exact shared fund NAV/proxy anchors for a full 30-year window |
These figures are illustrations, not predictions or personalized advice. Returns and fees can differ. Read the research disclaimer.
Change the illustration
Computed from SEC filings
Assumptions for the dollar figures below: $100,000 starting amount; 5.0% annual return; 20 years; annual compounding; fees deducted annually; 0.01% computed index-control baseline. VIOO SEC expense filing, as of 2025-08-31. Methodology.
| Result | Amount |
|---|---|
| Ending value at baseline | $264,825 |
| Ending value at filed expense ratio | $261,814 |
| Difference attributed to fee drag | $3,010 |
This is an illustration, not a prediction or personalized advice. Returns and fees can differ. Read the research disclaimer.
Largest active differences vs the S&P SmallCap 600
The bars are labeled and repeated in the table; color is not the only signal. Linked company names open Buy Like Buffett’s company record; Sensible Investor does not score stocks.
| Holding | Fund | S&P SmallCap 600 | Difference |
|---|---|---|---|
| Solstice Advanced Materials Inc | 0.79% | 0.00% | +0.79% |
| Moog Inc | 0.61% | 0.00% | +0.61% |
| InterDigital Inc | 0.60% | 0.00% | +0.60% |
| CareTrust REIT Inc | 0.58% | 0.00% | +0.58% |
| SiTime Corp | 0.55% | 0.00% | +0.55% |
| Argan Inc | 0.00% | 0.50% | -0.50% |
| Match Group Inc | 0.00% | 0.48% | -0.48% |
| Molina Healthcare, Inc. | 0.00% | 0.46% | -0.46% |
| Paycom Software Inc | 0.00% | 0.39% | -0.39% |
| Lamb Weston Holdings Inc | 0.00% | 0.39% | -0.39% |
Source and verification
SEC N-PORT filing · filed 2026-04-28 · period 2026-02-28
SEC expense filing · period 2025-08-31
Cite these figures
Each snippet includes the figure’s source-event date and immutable verification URL.
Best-fit active share
Sensible Investor, “VANGUARD S&P SMALL-CAP 600 INDEX FUND — best-fit active share,” 9.0% versus the S&P SmallCap 600, fund portfolio as of 2026-02-28; measured against the filed holdings of iShares Core S&P Small-Cap ETF (IJR), as of 2026-03-31. https://sensible-investor.com/registry/vioo/as-of/363649da-fcfb-4007-87ef-de06de7710ca
VIOO filed expense ratio
Sensible Investor, “VANGUARD S&P SMALL-CAP 600 INDEX FUND — filed expense ratio,” 0.07% for VIOO, as of 2025-08-31. https://sensible-investor.com/registry/vioo/as-of/363649da-fcfb-4007-87ef-de06de7710ca
VIOO fee per active unit
Sensible Investor, “VANGUARD S&P SMALL-CAP 600 INDEX FUND — fee per unit of active management,” 0.78% using the VIOO expense ratio as of 2025-08-31 and fund portfolio as of 2026-02-28. https://sensible-investor.com/registry/vioo/as-of/363649da-fcfb-4007-87ef-de06de7710ca