FIBUX vs. FADMX
FIBUX (Fidelity Flex U.S. Bond Index Fund) and FADMX (Fidelity Strategic Income Fund) are both Total Bond Market funds from Fidelity. Over the past 5 years, FIBUX returned -0.09%/yr vs 3.23%/yr for FADMX. A 0.65 correlation means they provide meaningful diversification when combined. FIBUX charges 0.00%/yr vs 0.66%/yr for FADMX.
Performance
FIBUX vs. FADMX - Performance Comparison
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Returns By Period
In the year-to-date period, FIBUX achieves a 0.13% return, which is significantly lower than FADMX's 3.37% return.
FIBUX
- 1D
- -0.33%
- 1M
- 0.57%
- YTD
- 0.13%
- 6M
- 0.47%
- 1Y
- 4.25%
- 3Y*
- 3.89%
- 5Y*
- -0.09%
- 10Y*
- —
FADMX
- 1D
- -0.08%
- 1M
- 1.34%
- YTD
- 3.37%
- 6M
- 3.78%
- 1Y
- 9.26%
- 3Y*
- 8.21%
- 5Y*
- 3.23%
- 10Y*
- —
FIBUX vs. FADMX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
FIBUX Fidelity Flex U.S. Bond Index Fund | 0.13% | 7.20% | 1.31% | 5.46% | -13.41% | -2.16% | 7.08% | 8.58% | 2.61% |
FADMX Fidelity Strategic Income Fund | 3.37% | 9.01% | 6.02% | 9.55% | -11.84% | 3.46% | 6.72% | 11.06% | -2.02% |
Correlation
The correlation between FIBUX and FADMX is 0.71, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.71 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.78 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.78 |
Correlation (All Time) Calculated using the full available price history since Apr 30, 2018 | 0.65 |
The correlation between FIBUX and FADMX shifts across timeframes, from 0.65 (all time) to 0.78 (5 years), reflecting how their relationship changes across market environments.
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Return for Risk
FIBUX vs. FADMX — Risk / Return Rank
FIBUX
FADMX
FIBUX vs. FADMX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fidelity Flex U.S. Bond Index Fund (FIBUX) and Fidelity Strategic Income Fund (FADMX). 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.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| FIBUX | FADMX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.49 | ||
| Sortino ratioReturn per unit of downside risk | -2.25 | ||
| Omega ratioGain probability vs. loss probability | 1.20 | 1.55 | -0.35 |
| Calmar ratioReturn relative to maximum drawdown | 1.52 | 3.66 | -2.14 |
| Martin ratioReturn relative to average drawdown | 4.23 | 15.86 | -11.63 |
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Drawdowns
FIBUX vs. FADMX - Drawdown Comparison
The maximum FIBUX drawdown since its inception was -19.76%, which is greater than FADMX's maximum drawdown of -15.98%. Use the drawdown chart below to compare losses from any high point for FIBUX and FADMX.
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Drawdown Indicators
| FIBUX | FADMX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.76% | -15.98% | -3.78% |
Max Drawdown (1Y)Largest decline over 1 year | -2.97% | -2.62% | -0.35% |
Max Drawdown (3Y)Largest decline over 3 years | -6.09% | -3.99% | -2.10% |
Max Drawdown (5Y)Largest decline over 5 years | -18.40% | -15.98% | -2.42% |
Current DrawdownCurrent decline from peak | -3.75% | -0.08% | -3.67% |
Average DrawdownAverage peak-to-trough decline | -5.78% | -3.05% | -2.73% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.06% | 0.60% | +0.46% |
Volatility
FIBUX vs. FADMX - Volatility Comparison
The current volatility for Fidelity Flex U.S. Bond Index Fund (FIBUX) is 1.11%, while Fidelity Strategic Income Fund (FADMX) has a volatility of 1.35%. This indicates that FIBUX experiences smaller price fluctuations and is considered to be less risky than FADMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| FIBUX | FADMX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.11% | 1.35% | -0.24% |
Volatility (6M)Calculated over the trailing 6-month period | 2.90% | 3.06% | -0.16% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.97% | 3.64% | +0.33% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.04% | 4.54% | +1.50% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.11% | 4.77% | +0.34% |
FIBUX vs. FADMX - Expense Ratio Comparison
FIBUX has a 0.00% expense ratio, which is lower than FADMX's 0.66% expense ratio.
Dividends
FIBUX vs. FADMX - Dividend Comparison
FIBUX's dividend yield for the trailing twelve months is around 4.09%, less than FADMX's 4.28% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
FADMX Fidelity Strategic Income Fund | 4.28% | 4.33% | 4.16% | 4.31% | 2.91% | 4.23% | 3.82% | 4.34% | 2.74% | 0.00% |
FIBUX Fidelity Flex U.S. Bond Index Fund | 4.09% | 3.95% | 3.65% | 2.93% | 1.62% | 1.18% | 2.32% | 2.96% | 2.70% | 2.45% |
Frequently Asked Questions
FIBUX and FADMX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
FADMX has higher volatility (1.35%) compared to FIBUX (1.11%). In terms of maximum drawdown, FIBUX dropped -19.76% vs FADMX's -15.98%.
FADMX currently has the higher Sharpe Ratio (2.63 vs 1.14), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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