Published registry · Registry rank 1638 · Portfolio as of 2026-08-31
Mid Cap Index Fund
VMIDX (Mid Cap Index Fund)
The verdict
What the numbers say
90.6% of this portfolio matches the S&P MidCap 400, which costs $100 a year per $100,000 to own outright. This fund charges $350 a year.
Data provenance
Run a4f62e02-b219-4886-9f63-0e24f89a3444; method closet-index@3.0.0; fund accession 0001410368-26-108877; comparison periods and expense-filing links appear with their figures. Machine capture time: 2026-11-01T12:43:51.325Z.
Computed rule checks
1 warning · 0 checks clear · 2 checks need source inputs
Warning
· Rule 1
The fund’s filed benchmark and its closest approved index control point to different comparisons.
Methodology rule · visual rules si-visual-explainers@1.0.0
No positive-fee index control is available
· Rule 2
The active-share, filed-fee, or same-index control input needed for this warning is unavailable.
Methodology rule · visual rules si-visual-explainers@1.0.0
No complete licensed window with a filed fee
· 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 2025-05-31
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 |
|---|---|---|---|
| VMIDX0.35% · SEC expense filing · as of 2025-05-31 | $5,194 | $16,635 | $39,961 |
Real trailing windows
Computed on licensed market-return history · published run 363649da-fcfb-4007-87ef-de06de7710ca
Trailing windows use iShares Core S&P Mid-Cap ETF (IJH) 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 |
|---|---|---|---|
| VMIDXFiled fee as of 2025-05-31 | $8,484Computed on licensed market-return history 2016-07-29 to 2026-07-29 · proxy return 10.88% annualized | $40,719Computed on licensed market-return history 2006-07-31 to 2026-07-29 · proxy return 10.06% 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 |
|---|---|---|---|
| VMIDX | 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. VMIDX SEC expense filing, as of 2025-05-31. Methodology.
| Result | Amount |
|---|---|
| Ending value at baseline | $264,825 |
| Ending value at filed expense ratio | $248,190 |
| Difference attributed to fee drag | $16,635 |
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 MidCap 400
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 MidCap 400 | Difference |
|---|---|---|---|
| State Street Institutional US Government Money Market Fund | 0.56% | 0.00% | +0.56% |
| Toast Inc | 0.45% | 0.00% | +0.45% |
| Sun Communities Inc | 0.39% | 0.00% | +0.39% |
| MKS INC | 0.48% | 0.83% | -0.35% |
| WEBSTER FINANCIAL CORP | 0.00% | 0.34% | -0.34% |
| STERLING INFRASTRUCTURE INC | 0.40% | 0.71% | -0.31% |
| MASTEC INC | 0.41% | 0.71% | -0.29% |
| Allison Transmission Holdings Inc | 0.29% | 0.00% | +0.29% |
| Molina Healthcare Inc | 0.29% | 0.00% | +0.29% |
| TOPBUILD CORP | 0.00% | 0.27% | -0.27% |
Source and verification
SEC N-PORT filing · filed 2026-10-27 · period 2026-08-31
SEC expense filing · period 2025-05-31
Cite these figures
Each snippet includes the figure’s source-event date and immutable verification URL.
Best-fit active share
Sensible Investor, “Mid Cap Index Fund — best-fit active share,” 9.4% versus the S&P MidCap 400, fund portfolio as of 2026-08-31; measured against the filed holdings of iShares Core S&P Mid-Cap ETF (IJH), as of 2026-06-30. https://sensible-investor.com/registry/vmidx/as-of/a4f62e02-b219-4886-9f63-0e24f89a3444
VMIDX filed expense ratio
Sensible Investor, “Mid Cap Index Fund — filed expense ratio,” 0.35% for VMIDX, as of 2025-05-31. https://sensible-investor.com/registry/vmidx/as-of/a4f62e02-b219-4886-9f63-0e24f89a3444
VMIDX fee per active unit
Sensible Investor, “Mid Cap Index Fund — fee per unit of active management,” 3.73% using the VMIDX expense ratio as of 2025-05-31 and fund portfolio as of 2026-08-31. https://sensible-investor.com/registry/vmidx/as-of/a4f62e02-b219-4886-9f63-0e24f89a3444