AIBAX vs. FXAIX
AIBAX (American Funds Intermediate Bond Fund of America) and FXAIX (Fidelity 500 Index Fund) are both mutual funds - AIBAX is a Short-Term Bond fund managed by American Funds, while FXAIX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, AIBAX returned 1.60%/yr vs 15.80%/yr for FXAIX. At a correlation of -0.11, they often move in opposite directions. AIBAX charges 0.63%/yr vs 0.02%/yr for FXAIX.
Performance
AIBAX vs. FXAIX - Performance Comparison
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Returns By Period
In the year-to-date period, AIBAX achieves a -0.50% return, which is significantly lower than FXAIX's 9.79% return. Over the past 10 years, AIBAX has underperformed FXAIX with an annualized return of 1.60%, while FXAIX has yielded a comparatively higher 15.80% annualized return.
AIBAX
- 1D
- -0.24%
- 1M
- 0.17%
- YTD
- -0.50%
- 6M
- -0.02%
- 1Y
- 2.83%
- 3Y*
- 4.11%
- 5Y*
- 0.92%
- 10Y*
- 1.60%
FXAIX
- 1D
- -0.37%
- 1M
- 0.10%
- YTD
- 9.79%
- 6M
- 8.79%
- 1Y
- 25.51%
- 3Y*
- 21.39%
- 5Y*
- 13.60%
- 10Y*
- 15.80%
AIBAX vs. FXAIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AIBAX American Funds Intermediate Bond Fund of America | -0.50% | 6.83% | 2.91% | 4.09% | -8.02% | -0.89% | 7.36% | 4.40% | 0.92% | 1.06% |
FXAIX Fidelity 500 Index Fund | 9.79% | 17.84% | 25.01% | 26.29% | -18.14% | 28.71% | 18.42% | 31.48% | -4.43% | 21.82% |
Correlation
The correlation between AIBAX and FXAIX is 0.30, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.30 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.15 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.13 |
Correlation (10Y) Calculated over the trailing 10-year period | -0.01 |
Correlation (All Time) Calculated using the full available price history since May 4, 2011 | -0.11 |
The correlation between AIBAX and FXAIX shifts across timeframes, from -0.11 (all time) to 0.30 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
AIBAX vs. FXAIX — Risk / Return Rank
AIBAX
FXAIX
AIBAX vs. FXAIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Funds Intermediate Bond Fund of America (AIBAX) and Fidelity 500 Index Fund (FXAIX). 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.
| AIBAX | FXAIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.08 | ||
| Sortino ratioReturn per unit of downside risk | -1.22 | ||
| Omega ratioGain probability vs. loss probability | 1.20 | 1.39 | -0.19 |
| Calmar ratioReturn relative to maximum drawdown | 1.42 | 3.02 | -1.60 |
| Martin ratioReturn relative to average drawdown | 4.04 | 13.62 | -9.58 |
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Drawdowns
AIBAX vs. FXAIX - Drawdown Comparison
The maximum AIBAX drawdown since its inception was -11.42%, smaller than the maximum FXAIX drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for AIBAX and FXAIX.
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Drawdown Indicators
| AIBAX | FXAIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -11.42% | -33.79% | +22.37% |
Max Drawdown (1Y)Largest decline over 1 year | -2.18% | -8.89% | +6.71% |
Max Drawdown (3Y)Largest decline over 3 years | -2.99% | -18.76% | +15.77% |
Max Drawdown (5Y)Largest decline over 5 years | -11.33% | -24.50% | +13.17% |
Max Drawdown (10Y)Largest decline over 10 years | -11.42% | -33.79% | +22.37% |
Current DrawdownCurrent decline from peak | -1.62% | -1.72% | +0.10% |
Average DrawdownAverage peak-to-trough decline | -1.19% | -3.79% | +2.60% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.76% | 1.97% | -1.21% |
Volatility
AIBAX vs. FXAIX - Volatility Comparison
The current volatility for American Funds Intermediate Bond Fund of America (AIBAX) is 0.95%, while Fidelity 500 Index Fund (FXAIX) has a volatility of 4.68%. This indicates that AIBAX experiences smaller price fluctuations and is considered to be less risky than FXAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| AIBAX | FXAIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.95% | 4.68% | -3.73% |
Volatility (6M)Calculated over the trailing 6-month period | 2.13% | 9.84% | -7.71% |
Volatility (1Y)Calculated over the trailing 1-year period | 2.91% | 12.50% | -9.59% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.20% | 17.00% | -12.80% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.29% | 18.12% | -14.83% |
AIBAX vs. FXAIX - Expense Ratio Comparison
AIBAX has a 0.63% expense ratio, which is higher than FXAIX's 0.02% expense ratio.
Dividends
AIBAX vs. FXAIX - Dividend Comparison
AIBAX's dividend yield for the trailing twelve months is around 3.88%, more than FXAIX's 1.04% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AIBAX American Funds Intermediate Bond Fund of America | 3.88% | 3.87% | 4.00% | 3.01% | 1.63% | 0.91% | 3.25% | 2.59% | 1.66% | 1.21% | 1.72% | 1.85% |
FXAIX Fidelity 500 Index Fund | 1.04% | 1.11% | 1.25% | 1.45% | 1.69% | 1.22% | 1.60% | 2.06% | 2.72% | 1.97% | 2.52% | 2.83% |
Frequently Asked Questions
AIBAX and FXAIX have a correlation of 0.30, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
FXAIX has higher volatility (4.68%) compared to AIBAX (0.95%). In terms of maximum drawdown, AIBAX dropped -11.42% vs FXAIX's -33.79%.
FXAIX currently has the higher Sharpe Ratio (2.15 vs 1.07), 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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