Registry rank 1013 · Portfolio as of 2026-02-28

VANGUARD S&P SMALL-CAP 600 INDEX FUND

VIOO · VSMSX

Best-fit active share9.0%vs IJR · fund as of 2026-02-28 · proxy as of 2026-03-31

Declared-benchmark active share9.0%S&P SmallCap 600 Index · benchmark match · fund as of 2026-02-28 · proxy as of 2026-03-31 · declared source as of 2025-08-31

VIOO expense ratio0.07%SEC expense filing · as of 2025-08-31

VIOO fee per active unit0.78%expense as of 2025-08-31; fund as of 2026-02-28; proxy as of 2026-03-31

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.

Illustrated difference between each class’s filed expense ratio and the computed index-control baseline. Computed from SEC filings.
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 IJR adjusted-close total-return history through 2026-07-29 and the same filed index-control fee baseline as the convention table. Methodology.

Dollar fee drag over actual trailing proxy-return windows. Each result below is computed on licensed market-return history.
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.

Derived annualized percentages only. Each result below is computed on licensed market-return history.
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

Return mode 5% SEC convention Real trailing window

Share classStarting amount ($)YearsAnnual return (%)

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.

SEC-convention illustration for VIOO; expense ratio filed as of 2025-08-31.
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 IJR

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.

Solstice Advanced Materials Inc+0.79%

Moog Inc+0.61%

InterDigital Inc+0.60%

CareTrust REIT Inc+0.58%

SiTime Corp+0.55%

Argan Inc-0.50%

Match Group Inc-0.48%

Molina Healthcare, Inc.-0.46%

Paycom Software Inc-0.39%

Lamb Weston Holdings Inc-0.39%

Holding	Fund	IJR	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

Immutable verification record · Active-share method

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 IJR, fund portfolio as of 2026-02-28. 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