FSMDX — Fidelity Mid Cap Index Fund
Data updated: 2026-07-10
FSMDX — Fidelity Mid Cap Index Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Mid Cap Blend / Core Equity · $50.04B AUM · 0.03% expense ratio · 25.8% 1-yr return. From SEC regulatory filings.
FSMDX Fund Overview
FSMDX — Fidelity Mid Cap Index Fund is a US mutual fund managed by Fidelity Salem Street Trust, 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: Fidelity Salem Street Trust
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $50.04B
- 1-year return: 25.8%
- Ticker: FSMDX
- SEC CIK: 0000035315
- SEC series ID: S000033637
- Share class ID: C000103368
FSMDX Holdings
Top 10 holdings of Fidelity Mid Cap Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Fidelity Revere Street Trust | 2.11% |
| Sandisk Corp/de | 1.16% |
| Western Digital Corp. | 1.09% |
| Corning, Inc. | 0.95% |
| Vertiv Holdings Co. | 0.93% |
| Quanta Svcs, Inc. | 0.79% |
| Howmet Aerospace, Inc. | 0.72% |
| Bank New York Mellon Corp. | 0.68% |
| Cummins, Inc. | 0.68% |
| Valero Energy Corp. | 0.57% |
FSMDX Portfolio Allocation
Asset-class allocation of Fidelity Mid Cap Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.7% |
| Cash & Equivalents | 2.3% |
FSMDX Performance
Total returns for FSMDX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 8.7% |
| 1 year | 25.8% |
| 3 years (annualised) | 16.2% |
| 5 years (annualised) | 7.7% |
FSMDX Risk Information
Risk metrics for FSMDX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.4%
FSMDX Costs and Fees
FSMDX costs about $3 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.03%
- Gross expense ratio: 0.03%
- Portfolio turnover: 12%
- Brokerage commissions: 0.12 bps of average net assets (SEC N-CEN)
FSMDX Cashflows
Over the 12 months to 2026-04, Fidelity Mid Cap Index Fund had net inflows of $2.79B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | $46.77M |
| 2026-03 | $294.53M |
| 2026-02 | $225.82M |
| 2026-01 | −$323.95M |
| 2025-12 | $538.91M |
| 2025-11 | $169.07M |
FSMDX Debt Constituents
Largest debt holdings of Fidelity Mid Cap Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Ust Bills | 0.02% |
FSMDX Prospectus and SEC Filings
Official Fidelity Mid Cap Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
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.