FDFIX vs. FSKAX
Compare and contrast key facts about Fidelity Flex 500 Index Fund (FDFIX) and Fidelity Total Market Index Fund (FSKAX).
FDFIX is managed by Fidelity. It was launched on Mar 9, 2017. FSKAX is managed by Fidelity.
Performance
FDFIX vs. FSKAX - Performance Comparison
Loading graphics...
FDFIX vs. FSKAX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
FDFIX Fidelity Flex 500 Index Fund | -7.27% | 17.59% | 25.06% | 26.27% | -18.10% | 28.69% | 18.46% | 31.47% | -4.45% | 14.41% |
FSKAX Fidelity Total Market Index Fund | -6.77% | 17.06% | 23.89% | 26.12% | -19.53% | 25.66% | 20.79% | 30.92% | -5.32% | 14.57% |
Returns By Period
In the year-to-date period, FDFIX achieves a -7.27% return, which is significantly lower than FSKAX's -6.77% return.
FDFIX
- 1D
- -0.33%
- 1M
- -7.59%
- YTD
- -7.27%
- 6M
- -4.96%
- 1Y
- 13.90%
- 3Y*
- 17.02%
- 5Y*
- 11.31%
- 10Y*
- —
FSKAX
- 1D
- -0.47%
- 1M
- -7.69%
- YTD
- -6.77%
- 6M
- -4.56%
- 1Y
- 14.73%
- 3Y*
- 16.72%
- 5Y*
- 10.13%
- 10Y*
- 13.23%
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
FDFIX vs. FSKAX - Expense Ratio Comparison
FDFIX has a 0.00% expense ratio, which is lower than FSKAX's 0.02% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Return for Risk
FDFIX vs. FSKAX — Risk / Return Rank
FDFIX
FSKAX
FDFIX vs. FSKAX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fidelity Flex 500 Index Fund (FDFIX) and Fidelity Total Market Index Fund (FSKAX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
| FDFIX | FSKAX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.81 | 0.83 | -0.02 |
Sortino ratioReturn per unit of downside risk | 1.26 | 1.29 | -0.03 |
Omega ratioGain probability vs. loss probability | 1.19 | 1.19 | 0.00 |
Calmar ratioReturn relative to maximum drawdown | 0.96 | 1.04 | -0.08 |
Martin ratioReturn relative to average drawdown | 4.59 | 5.05 | -0.46 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Loading graphics...
Sharpe Ratios by Period
| FDFIX | FSKAX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.81 | 0.83 | -0.02 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.67 | 0.59 | +0.09 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | 0.72 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.71 | 0.78 | -0.07 |
Correlation
The correlation between FDFIX and FSKAX is 0.99, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
FDFIX vs. FSKAX - Dividend Comparison
FDFIX's dividend yield for the trailing twelve months is around 1.20%, more than FSKAX's 1.09% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FDFIX Fidelity Flex 500 Index Fund | 1.20% | 1.11% | 1.26% | 1.48% | 1.70% | 1.27% | 1.52% | 1.78% | 2.16% | 0.50% | 0.00% | 0.00% |
FSKAX Fidelity Total Market Index Fund | 1.09% | 1.01% | 1.19% | 1.41% | 1.62% | 1.15% | 1.45% | 1.94% | 2.54% | 2.07% | 2.43% | 0.82% |
Drawdowns
FDFIX vs. FSKAX - Drawdown Comparison
The maximum FDFIX drawdown since its inception was -33.77%, roughly equal to the maximum FSKAX drawdown of -35.01%. Use the drawdown chart below to compare losses from any high point for FDFIX and FSKAX.
Loading graphics...
Drawdown Indicators
| FDFIX | FSKAX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -33.77% | -35.01% | +1.24% |
Max Drawdown (1Y)Largest decline over 1 year | -12.13% | -12.42% | +0.29% |
Max Drawdown (5Y)Largest decline over 5 years | -24.51% | -25.39% | +0.88% |
Max Drawdown (10Y)Largest decline over 10 years | — | -35.01% | — |
Current DrawdownCurrent decline from peak | -8.99% | -8.92% | -0.07% |
Average DrawdownAverage peak-to-trough decline | -4.64% | -4.05% | -0.59% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.60% | 2.57% | +0.03% |
Volatility
FDFIX vs. FSKAX - Volatility Comparison
Fidelity Flex 500 Index Fund (FDFIX) and Fidelity Total Market Index Fund (FSKAX) have volatilities of 4.22% and 4.42%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
Loading graphics...
Volatility by Period
| FDFIX | FSKAX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.22% | 4.42% | -0.20% |
Volatility (6M)Calculated over the trailing 6-month period | 9.16% | 9.40% | -0.24% |
Volatility (1Y)Calculated over the trailing 1-year period | 18.20% | 18.50% | -0.30% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 16.91% | 17.38% | -0.47% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.68% | 18.42% | +0.26% |