FDFIX — Fidelity Flex 500 Index Fund
Data updated: 2026-07-24
FDFIX — Fidelity Flex 500 Index Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Large Cap Blend / Core Equity · $9.20B AUM · 0.00% expense ratio · 29.2% 1-yr return. From SEC regulatory filings.
FDFIX Fund Overview
FDFIX — Fidelity Flex 500 Index Fund is a US mutual fund managed by Fidelity Concord Street Trust, categorised as United States Large 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 Large Cap Blend / Core Equity
- Assets under management: $9.20B
- 1-year return: 29.2%
- Ticker: FDFIX
- SEC CIK: 0000819118
- SEC series ID: S000056363
- Share class ID: C000177590
FDFIX Holdings
Top 10 holdings of Fidelity Flex 500 Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| NVIDIA Corp. | 7.73% |
| Apple, Inc. | 6.90% |
| Microsoft Corp. | 5.04% |
| Amazon.com, Inc. | 3.98% |
| Alphabet, Inc. | 3.33% |
| Broadcom, Inc. | 3.19% |
| Alphabet, Inc. | 2.66% |
| Meta Platforms, Inc. | 2.08% |
| Tesla, Inc. | 1.85% |
| Micron Technology, Inc. | 1.65% |
FDFIX Portfolio Allocation
Asset-class allocation of Fidelity Flex 500 Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.7% |
| Fixed Income | 0.2% |
| Cash & Equivalents | 0.2% |
FDFIX Performance
Total returns for FDFIX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 11.0% |
| 1 year | 29.2% |
| 3 years (annualised) | 23.4% |
| 5 years (annualised) | 14.0% |
FDFIX Risk Information
Risk metrics for FDFIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 13.1%
FDFIX Costs and Fees
FDFIX costs about $0 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.00%
- Gross expense ratio: 0.00%
- Portfolio turnover: 4%
- Brokerage commissions: 0.06 bps of average net assets (SEC N-CEN)
FDFIX Cashflows
Over the 12 months to 2026-02, Fidelity Flex 500 Index Fund had net inflows of $1.38B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | $137.19M |
| 2026-01 | $167.51M |
| 2025-12 | $92.38M |
| 2025-11 | $44.26M |
| 2025-10 | $126.43M |
| 2025-09 | $176.06M |
FDFIX Debt Constituents
Largest debt holdings of Fidelity Flex 500 Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Ust Bills | 0.16% |
FDFIX Prospectus and SEC Filings
Official Fidelity Flex 500 Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Large 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.