ETF · real data, updated daily
FDFIX · Fidelity Flex 500 Index Fund
Over the last 10 years (2017-04 to 2026-10), $10,000 invested in FDFIX with dividends reinvested grew to $37,627, 14.83% a year, with a worst peak-to-trough fall of -23.87%. Past performance doesn't predict future results.
Growth of $10,000 · 2017-04 to 2026-10 · dividends reinvested
How FDFIX held up in past market crashes
FDFIX has been through 3 of the market crashes since 2000 in our data. Its deepest price fall was 33.8% in the 2020 COVID crash, when the S&P 500 fell 34.1%. It took 5 months from the bottom to get back to its high. No fund is safe from losses; past falls do not predict future ones.
| Crash | FDFIX deepest fall | S&P 500 (SPY) | Peak to bottom | Back to peak |
|---|---|---|---|---|
| 2018 fourth-quarter selloff | -20.2% | -20.2% | Sep 2018 to Dec 2018 | 4 months |
| 2020 COVID crash | -33.8% | -34.1% | Feb 2020 to Mar 2020 | 5 months |
| 2022 bear market | -25.4% | -25.4% | Jan 2022 to Oct 2022 | 15 months |
Price declines in the fund's listing currency, dividends not included, inside each crash's S&P 500 peak-to-bottom window. See how 50 popular ETFs compare in the crash study.
About FDFIX
The Fidelity Flex 500 Index Fund is a passively managed mutual fund designed to closely track the performance of the S&P 500 Index, which represents the largest publicly traded companies in the United States. Launched in 2017, the fund seeks to deliver results corresponding to the total return—encompassing both capital appreciation and income—of the S&P 500. As a large blend fund, it invests predominantly in a diversified mix of growth and value stocks from major sectors such as technology, healthcare, financial services, and consumer discretionary. With over 500 holdings, the fund closely mirrors the sector and company weightings of its benchmark, with approximately one-third of its assets concentrated in its top ten holdings, including prominent names like Apple, Microsoft, and NVIDIA. The Fidelity Flex 500 Index Fund is notable for its extremely low expense ratio, making it cost-efficient compared to peers. Its low portfolio turnover further emphasizes its index-tracking approach. Overall, the fund serves as a foundational component in diversified portfolios, offering broad exposure to the U.S. large-cap equity market and reflecting the performance of established, market-leading companies.
Put FDFIX to the test
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Backtest FDFIX →
Full history, any date range, benchmarks, drawdowns, rolling returns.
Would FDFIX survive 2008? →
What actually happened to it in the crisis: real drawdown and recovery.
Project it forward →
Monte Carlo simulation of where it could go from here.
Compare FDFIX vs VTI →
Side by side with the total US market: returns, drawdowns and volatility over their shared history.
Replay $100/mo into FDFIX →
Animated growth of steady monthly contributions.
Fundamentals →
Holdings-level financials where available.
Educational use only, not investment advice. Results are hypothetical.Read full disclaimer
This tool is for educational and informational purposes only and does not provide financial, investment, tax, legal, or accounting advice. Results are hypothetical and based on historical data and assumptions that may be inaccurate. Past performance does not guarantee future results. Consult a licensed professional before making investment decisions.