Registry rank 1934 · Portfolio as of 2026-03-31
Mid Cap Index Fund
NOMIX (Mid Cap Index Fund)
The verdict
What the numbers say
At $100 a year per $100,000 (0.10%), this is the lowest-cost fund tracking the S&P MidCap 400 in this registry.
Data provenance
Run 363649da-fcfb-4007-87ef-de06de7710ca; method closet-index@2.0.0; fund accession 0002066578-26-001926; comparison periods and expense-filing links appear with their figures. Machine capture time: 2026-07-29T14:22:09.616Z.
Computed rule checks
2 warnings · 1 check clear · 0 unavailable
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
Check clear
· Rule 2
The existing same-index active-share and fee rule does not issue a closet-index warning. This is not a rating.
Methodology rule · visual rules si-visual-explainers@1.0.0
Warning
· Rule 3
Over the 20-year window from 2006-07-31 to 2026-07-29, annualized fund-minus-index tracking difference was -0.11% against a 0.10% filed fee. The annualized lag was greater than the fee.
Computed on licensed market-return history · filed fee as of 2025-03-31
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.
This is the lowest-cost class for its index, so there is no comparison against itself.
Real trailing windows
Computed on licensed market-return history
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.
No trailing-window comparison is shown against the same class.
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 |
|---|---|---|---|
| NOMIX | -0.02%Computed on licensed market-return history 2016-07-29 to 2026-07-29 | -0.11%Computed on licensed market-return history 2006-07-31 to 2026-07-29 | 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.
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 |
|---|---|---|---|
| COREBRIDGE FINL. INC | 0.19% | 0.00% | +0.19% |
| Equitable Holdings Inc | 0.33% | 0.28% | +0.05% |
| Wesco International, Inc. | 0.42% | 0.41% | +0.01% |
| TechnipFMC PLC | 0.88% | 0.88% | -0.00% |
| Avnet, Inc. | 0.16% | 0.16% | -0.00% |
| AUTONATION INC | 0.16% | 0.16% | -0.00% |
| Lear Corporation | 0.19% | 0.19% | -0.00% |
| Pinterest Inc | 0.33% | 0.34% | -0.00% |
| Voya Financial Inc | 0.20% | 0.20% | -0.00% |
| Cirrus Logic, Inc. | 0.23% | 0.23% | -0.00% |
Source and verification
SEC N-PORT filing · filed 2026-05-28 · period 2026-03-31
SEC expense filing · period 2025-03-31
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,” 0.3% versus the S&P MidCap 400, fund portfolio as of 2026-03-31; measured against the filed holdings of iShares Core S&P Mid-Cap ETF (IJH), as of 2026-03-31. https://sensible-investor.com/registry/nomix/as-of/363649da-fcfb-4007-87ef-de06de7710ca
NOMIX filed expense ratio
Sensible Investor, “Mid Cap Index Fund — filed expense ratio,” 0.10% for NOMIX, as of 2025-03-31. https://sensible-investor.com/registry/nomix/as-of/363649da-fcfb-4007-87ef-de06de7710ca