Mid-Cap Equity Index Fund
Data updated: 2026-08-27
C000025744 — Mid-Cap Equity Index Fund. United States Mid Cap Blend / Core Equity · $1.31B AUM. Holdings, fees, performance and SEC filings.
C000025744 Fund Overview
Mid-Cap Equity Index Fund is a US mutual fund managed by Mutual Of America Investment CORP, categorised as United States Mid Cap Blend / Core Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Mutual Of America Investment CORP
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $1.31B
- 1-year return: 25.7%
- SEC CIK: 0000795259
- SEC series ID: S000009400
- Share class ID: C000025744
C000025744 Investment Objective and Strategy
Mid-Cap Equity Index Fund describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Mutual Of America Investment CORP.
Investment objective
The Fund seeks investment results (before fees and expenses) that correspond to the investment performance of the S&P MidCap 400 Index.
Principal investment strategy
The Fund invests primarily in the 400 common stocks included in the S&P MidCap 400 Index to replicate, to the extent practicable and cost effective, the weightings of such stocks in the Index. The components of the Index are market capitalization weighted, adjusted for free float, which is the value of shares readily available in the market as held by public investors. Under normal circumstances, at least 80% of the Funds net assets (plus the amount of any borrowings for investment purposes) are invested in securities included in the S&P MidCap 400 Index. The Fund is rebalanced at approximately the same time that the S&P MidCap 400 Index to which the Fund is benchmarked is rebalanced and reconstituted, which currently occurs on the third Friday of the last month of each quarter.
Because the Fund seeks to approximate the performance of an index, it expects to have investment exposure to industries and sectors represented in the index to the same extent as the representation of those industries and sectors in the index. Currently, the Fund invests significantly in the stocks of industrial and financial companies.
C000025744 Holdings
Top 10 holdings of Mid-Cap Equity Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Twilio, Inc. | 0.86% |
| Carpenter Technology Corp. | 0.83% |
| Mks, Inc. | 0.82% |
| United States Of America - Bureau Of The Public Debt | 0.78% |
| Curtiss-Wright Corp. | 0.77% |
| Entegris, Inc. | 0.76% |
| Nvent Electric PLC | 0.75% |
| Ati, Inc. | 0.73% |
| Illumina, Inc. | 0.73% |
| Technipfmc PLC | 0.72% |
C000025744 Portfolio Allocation
Asset-class allocation of Mid-Cap Equity Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 98.6% |
| Fixed Income | 1.2% |
C000025744 Performance
Total returns for C000025744 (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 17.2% |
| 1 year | 25.7% |
| 3 years (annualised) | 15.2% |
| 5 years (annualised) | 8.9% |
C000025744 Risk Information
Risk metrics for C000025744, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.2%
C000025744 Costs and Fees
C000025744 costs about $17 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.17%
- Gross expense ratio: 0.17%
- Portfolio turnover: 15%
- Brokerage commissions: 0.67 bps of average net assets (SEC N-CEN)
C000025744 Cashflows
Over the 12 months to 2026-06, Mid-Cap Equity Index Fund had net outflows of $302.80M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$9.14M |
| 2026-05 | −$60.81M |
| 2026-04 | −$10.29M |
| 2026-03 | −$129.85M |
| 2026-02 | −$6.27M |
| 2026-01 | −$6.86M |
C000025744 Debt Constituents
Largest debt holdings of Mid-Cap Equity Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Of America - Bureau Of The Public Debt | 0.78% |
| United States Of America - Bureau Of The Public Debt | 0.23% |
| United States Of America - Bureau Of The Public Debt | 0.19% |
C000025744 Prospectus and SEC Filings
Official Mid-Cap Equity Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-28
- Prospectus (485BPOS) — filed 2025-04-29
- Prospectus supplement (497) — filed 2026-01-07
- Portfolio holdings (N-PORT) — filed 2026-08-27
- Portfolio holdings (N-PORT) — filed 2026-05-21
- Portfolio holdings (N-PORT) — filed 2026-02-23
- Annual census (N-CEN) — filed 2026-03-12
- Annual census (N-CEN) — filed 2025-02-28
Related Funds
Other United States Mid Cap Blend / Core Equity funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.