FXNAX vs. FIBUX
Compare and contrast key facts about Fidelity U.S. Bond Index Fund (FXNAX) and Fidelity Flex U.S. Bond Index Fund (FIBUX).
FXNAX is managed by Fidelity. FIBUX is managed by Fidelity. It was launched on Mar 9, 2017.
Performance
FXNAX vs. FIBUX - Performance Comparison
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FXNAX vs. FIBUX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
FXNAX Fidelity U.S. Bond Index Fund | 0.05% | 7.14% | 1.35% | 5.82% | -13.55% | -2.10% | 7.63% | 8.50% | 0.04% | 3.98% |
FIBUX Fidelity Flex U.S. Bond Index Fund | 0.10% | 7.20% | 1.31% | 5.46% | -13.41% | -2.16% | 7.08% | 8.58% | 0.12% | 3.81% |
Returns By Period
In the year-to-date period, FXNAX achieves a 0.05% return, which is significantly lower than FIBUX's 0.10% return.
FXNAX
- 1D
- 0.00%
- 1M
- -1.19%
- YTD
- 0.05%
- 6M
- 0.69%
- 1Y
- 4.12%
- 3Y*
- 3.63%
- 5Y*
- 0.16%
- 10Y*
- 1.57%
FIBUX
- 1D
- 0.00%
- 1M
- -1.17%
- YTD
- 0.10%
- 6M
- 0.74%
- 1Y
- 4.21%
- 3Y*
- 3.63%
- 5Y*
- 0.12%
- 10Y*
- —
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FXNAX vs. FIBUX - Expense Ratio Comparison
FXNAX has a 0.03% expense ratio, which is higher than FIBUX's 0.00% expense ratio. However, 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
FXNAX vs. FIBUX — Risk / Return Rank
FXNAX
FIBUX
FXNAX vs. FIBUX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fidelity U.S. Bond Index Fund (FXNAX) and Fidelity Flex U.S. Bond Index Fund (FIBUX). 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.
| FXNAX | FIBUX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.93 | 0.93 | 0.00 |
Sortino ratioReturn per unit of downside risk | 1.34 | 1.33 | +0.01 |
Omega ratioGain probability vs. loss probability | 1.16 | 1.16 | 0.00 |
Calmar ratioReturn relative to maximum drawdown | 1.59 | 1.76 | -0.17 |
Martin ratioReturn relative to average drawdown | 4.47 | 4.95 | -0.48 |
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
| FXNAX | FIBUX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.93 | 0.93 | 0.00 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.03 | 0.02 | +0.01 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.32 | — | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.45 | 0.35 | +0.10 |
Correlation
The correlation between FXNAX and FIBUX is 0.97, 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
FXNAX vs. FIBUX - Dividend Comparison
FXNAX's dividend yield for the trailing twelve months is around 3.66%, less than FIBUX's 4.03% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FXNAX Fidelity U.S. Bond Index Fund | 3.66% | 3.58% | 3.40% | 3.15% | 1.81% | 1.74% | 2.92% | 2.68% | 2.74% | 2.57% | 2.76% | 2.52% |
FIBUX Fidelity Flex U.S. Bond Index Fund | 4.03% | 3.95% | 3.65% | 2.93% | 1.62% | 1.18% | 2.32% | 2.96% | 2.70% | 2.45% | 0.00% | 0.00% |
Drawdowns
FXNAX vs. FIBUX - Drawdown Comparison
The maximum FXNAX drawdown since its inception was -19.51%, roughly equal to the maximum FIBUX drawdown of -19.76%. Use the drawdown chart below to compare losses from any high point for FXNAX and FIBUX.
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Drawdown Indicators
| FXNAX | FIBUX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.51% | -19.76% | +0.25% |
Max Drawdown (1Y)Largest decline over 1 year | -2.71% | -2.78% | +0.07% |
Max Drawdown (5Y)Largest decline over 5 years | -18.54% | -18.40% | -0.14% |
Max Drawdown (10Y)Largest decline over 10 years | -19.51% | — | — |
Current DrawdownCurrent decline from peak | -3.23% | -3.78% | +0.55% |
Average DrawdownAverage peak-to-trough decline | -3.87% | -5.83% | +1.96% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.97% | 0.99% | -0.02% |
Volatility
FXNAX vs. FIBUX - Volatility Comparison
Fidelity U.S. Bond Index Fund (FXNAX) and Fidelity Flex U.S. Bond Index Fund (FIBUX) have volatilities of 1.64% and 1.71%, 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.
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Volatility by Period
| FXNAX | FIBUX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.64% | 1.71% | -0.07% |
Volatility (6M)Calculated over the trailing 6-month period | 2.61% | 2.68% | -0.07% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.35% | 4.44% | -0.09% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.04% | 6.02% | +0.02% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.99% | 5.13% | -0.14% |