ACLAX vs. FDFIX
Compare and contrast key facts about American Century Mid Cap Value Fund A Class (ACLAX) and Fidelity Flex 500 Index Fund (FDFIX).
ACLAX is managed by American Century. It was launched on Mar 31, 2004. FDFIX is managed by Fidelity. It was launched on Mar 9, 2017.
Performance
ACLAX vs. FDFIX - Performance Comparison
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ACLAX vs. FDFIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
ACLAX American Century Mid Cap Value Fund A Class | 0.93% | 8.52% | 8.18% | 5.93% | -1.53% | 23.01% | 1.44% | 28.55% | -12.93% | 8.35% |
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% |
Returns By Period
In the year-to-date period, ACLAX achieves a 0.93% return, which is significantly higher than FDFIX's -7.27% return.
ACLAX
- 1D
- -0.34%
- 1M
- -7.89%
- YTD
- 0.93%
- 6M
- 0.87%
- 1Y
- 7.39%
- 3Y*
- 7.47%
- 5Y*
- 6.30%
- 10Y*
- 8.37%
FDFIX
- 1D
- -0.33%
- 1M
- -7.59%
- YTD
- -7.27%
- 6M
- -4.96%
- 1Y
- 13.90%
- 3Y*
- 17.02%
- 5Y*
- 11.31%
- 10Y*
- —
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ACLAX vs. FDFIX - Expense Ratio Comparison
ACLAX has a 1.22% expense ratio, which is higher than FDFIX's 0.00% expense ratio.
Return for Risk
ACLAX vs. FDFIX — Risk / Return Rank
ACLAX
FDFIX
ACLAX vs. FDFIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century Mid Cap Value Fund A Class (ACLAX) and Fidelity Flex 500 Index Fund (FDFIX). 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.
| ACLAX | FDFIX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.53 | 0.81 | -0.28 |
Sortino ratioReturn per unit of downside risk | 0.87 | 1.26 | -0.39 |
Omega ratioGain probability vs. loss probability | 1.11 | 1.19 | -0.08 |
Calmar ratioReturn relative to maximum drawdown | 0.67 | 0.96 | -0.29 |
Martin ratioReturn relative to average drawdown | 2.51 | 4.59 | -2.09 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| ACLAX | FDFIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.53 | 0.81 | -0.28 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.43 | 0.67 | -0.24 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.48 | — | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.47 | 0.71 | -0.24 |
Correlation
The correlation between ACLAX and FDFIX is 0.76, 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
ACLAX vs. FDFIX - Dividend Comparison
ACLAX's dividend yield for the trailing twelve months is around 14.04%, more than FDFIX's 1.20% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ACLAX American Century Mid Cap Value Fund A Class | 14.04% | 14.24% | 8.53% | 5.01% | 14.77% | 15.72% | 1.62% | 1.23% | 14.17% | 9.25% | 3.82% | 10.86% |
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% |
Drawdowns
ACLAX vs. FDFIX - Drawdown Comparison
The maximum ACLAX drawdown since its inception was -51.37%, which is greater than FDFIX's maximum drawdown of -33.77%. Use the drawdown chart below to compare losses from any high point for ACLAX and FDFIX.
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Drawdown Indicators
| ACLAX | FDFIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -51.37% | -33.77% | -17.60% |
Max Drawdown (1Y)Largest decline over 1 year | -10.99% | -12.13% | +1.14% |
Max Drawdown (5Y)Largest decline over 5 years | -17.55% | -24.51% | +6.96% |
Max Drawdown (10Y)Largest decline over 10 years | -39.24% | — | — |
Current DrawdownCurrent decline from peak | -8.01% | -8.99% | +0.98% |
Average DrawdownAverage peak-to-trough decline | -6.29% | -4.64% | -1.65% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.95% | 2.60% | +0.35% |
Volatility
ACLAX vs. FDFIX - Volatility Comparison
The current volatility for American Century Mid Cap Value Fund A Class (ACLAX) is 3.69%, while Fidelity Flex 500 Index Fund (FDFIX) has a volatility of 4.22%. This indicates that ACLAX experiences smaller price fluctuations and is considered to be less risky than FDFIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| ACLAX | FDFIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 3.69% | 4.22% | -0.53% |
Volatility (6M)Calculated over the trailing 6-month period | 8.51% | 9.16% | -0.65% |
Volatility (1Y)Calculated over the trailing 1-year period | 15.58% | 18.20% | -2.62% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 14.63% | 16.91% | -2.28% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 17.48% | 18.68% | -1.20% |