FSMAX — Fidelity Extended Market Index Fund
Data updated: 2026-07-24
FSMAX — Fidelity Extended Market Index Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Mid Cap Blend / Core Equity · $42.73B AUM · 0.03% expense ratio · 30.3% 1-yr return. From SEC regulatory filings.
FSMAX Fund Overview
FSMAX — Fidelity Extended Market Index Fund is a US mutual fund managed by Fidelity Concord 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 Concord Street Trust
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $42.73B
- 1-year return: 30.3%
- Ticker: FSMAX
- SEC CIK: 0000819118
- SEC series ID: S000006021
- Share class ID: C000103355
FSMAX Holdings
Top 10 holdings of Fidelity Extended Market Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Fidelity Revere Street Trust | 5.49% |
| Marvell Technology, Inc. | 2.16% |
| Snowflake, Inc. | 1.06% |
| Cloudflare, Inc. | 0.93% |
| Bloom Energy Corp. | 0.89% |
| Rocket Lab Corp. | 0.81% |
| Flex Ltd. | 0.67% |
| Strategy, Inc. | 0.60% |
| Cheniere Energy, Inc. | 0.58% |
| Astera Labs, Inc. | 0.55% |
FSMAX Portfolio Allocation
Asset-class allocation of Fidelity Extended Market Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.9% |
| Cash & Equivalents | 5.5% |
FSMAX Performance
Total returns for FSMAX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 13.4% |
| 1 year | 30.3% |
| 3 years (annualised) | 21.2% |
| 5 years (annualised) | 6.5% |
FSMAX Risk Information
Risk metrics for FSMAX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 12.4%
FSMAX Costs and Fees
FSMAX costs about $3 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.03%
- Gross expense ratio: 0.03%
- Portfolio turnover: 23%
- Brokerage commissions: 0.26 bps of average net assets (SEC N-CEN)
FSMAX Cashflows
Over the 12 months to 2026-02, Fidelity Extended Market Index Fund had net outflows of $4.34B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | −$109.35M |
| 2026-01 | −$400.61M |
| 2025-12 | −$533.48M |
| 2025-11 | −$228.98M |
| 2025-10 | −$456.74M |
| 2025-09 | −$448.95M |
FSMAX Debt Constituents
Largest debt holdings of Fidelity Extended Market Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Ust Bills | 0.01% |
FSMAX Prospectus and SEC Filings
Official Fidelity Extended Market 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.