USAIX vs. FXNAX

Last updated Jun 4, 2026

USAIX (USAA Income Fund) and FXNAX (Fidelity U.S. Bond Index Fund) are both mutual funds - USAIX is a Intermediate Core-Plus Bond fund managed by Victory, while FXNAX is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Bond Index. Over the past 10 years, USAIX returned 2.62%/yr vs 1.51%/yr for FXNAX. Their correlation of 0.91 suggests significant overlap in exposure. USAIX charges 0.44%/yr vs 0.03%/yr for FXNAX.

Performance

USAIX vs. FXNAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in USAA Income Fund (USAIX) and Fidelity U.S. Bond Index Fund (FXNAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, USAIX achieves a 0.66% return, which is significantly higher than FXNAX's 0.40% return. Over the past 10 years, USAIX has outperformed FXNAX with an annualized return of 2.62%, while FXNAX has yielded a comparatively lower 1.51% annualized return.

USAIX

• 1D: 0.00%
• 1M: 0.66%
• YTD: 0.66%
• 6M: 0.61%
• 1Y: 5.67%
• 3Y*: 4.94%
• 5Y*: 0.78%
• 10Y*: 2.62%

FXNAX

• 1D: 0.00%
• 1M: 0.51%
• YTD: 0.40%
• 6M: 0.34%
• 1Y: 5.37%
• 3Y*: 4.02%
• 5Y*: 0.12%
• 10Y*: 1.51%

*Multi-year figures are annualized to reflect compound growth (CAGR)

USAIX vs. FXNAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
USAIX USAA Income Fund	0.66%	6.36%	3.32%	7.13%	-13.38%	0.39%	8.18%	11.07%	-1.37%	5.66%
FXNAX Fidelity U.S. Bond Index Fund	0.40%	7.14%	1.35%	5.82%	-13.55%	-2.10%	7.63%	8.50%	0.04%	3.50%

Correlation

The correlation between USAIX and FXNAX is 0.92, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since May 5, 2011	0.91

The correlation between USAIX and FXNAX has been stable across timeframes, ranging from 0.91 to 0.95 - a consistent structural relationship.

Return for Risk

USAIX vs. FXNAX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

USAIX

USAIX Risk / Return Rank: 32
USAIX Sharpe Ratio Rank: 32
USAIX Sortino Ratio Rank: 33
USAIX Omega Ratio Rank: 31
USAIX Calmar Ratio Rank: 37
USAIX Martin Ratio Rank: 29

FXNAX

FXNAX Risk / Return Rank: 23
FXNAX Sharpe Ratio Rank: 23
FXNAX Sortino Ratio Rank: 24
FXNAX Omega Ratio Rank: 22
FXNAX Calmar Ratio Rank: 24
FXNAX Martin Ratio Rank: 21

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

USAIX vs. FXNAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for USAA Income Fund (USAIX) and Fidelity U.S. Bond Index Fund (FXNAX). 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.

	USAIX	FXNAX	Difference
Sharpe ratio: Return per unit of total volatility	1.61	1.36	+0.25
Sortino ratio: Return per unit of downside risk	2.38	2.06	+0.33
Omega ratio: Gain probability vs. loss probability	1.29	1.24	+0.05
Calmar ratio: Return relative to maximum drawdown	2.29	1.83	+0.46
Martin ratio: Return relative to average drawdown	6.85	5.61	+1.25
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

USAIX vs. FXNAX - Sharpe Ratio Comparison

The current USAIX Sharpe Ratio is 1.61, which is comparable to the FXNAX Sharpe Ratio of 1.36. The chart below compares the historical Sharpe Ratios of USAIX and FXNAX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	USAIX	FXNAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.61	1.36	+0.25
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.14	0.02	+0.12
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.57	0.30	+0.26
Sharpe Ratio (All Time) Calculated using the full available price history	0.83	0.45	+0.38

Drawdowns

USAIX vs. FXNAX - Drawdown Comparison

The maximum USAIX drawdown since its inception was -18.67%, roughly equal to the maximum FXNAX drawdown of -19.51%. Use the drawdown chart below to compare losses from any high point for USAIX and FXNAX.

Drawdown Indicators

	USAIX	FXNAX	Difference
Max Drawdown Largest peak-to-trough decline	-18.67%	-19.51%	+0.84%
Max Drawdown (1Y) Largest decline over 1 year	-2.48%	-2.94%	+0.46%
Max Drawdown (3Y) Largest decline over 3 years	-5.31%	-6.16%	+0.85%
Max Drawdown (5Y) Largest decline over 5 years	-18.67%	-18.54%	-0.13%
Max Drawdown (10Y) Largest decline over 10 years	-18.67%	-19.51%	+0.84%
Current Drawdown Current decline from peak	-0.99%	-2.89%	+1.90%
Average Drawdown Average peak-to-trough decline	-2.97%	-3.87%	+0.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.83%	0.96%	-0.13%

Volatility

USAIX vs. FXNAX - Volatility Comparison

The current volatility for USAA Income Fund (USAIX) is 1.26%, while Fidelity U.S. Bond Index Fund (FXNAX) has a volatility of 1.41%. This indicates that USAIX experiences smaller price fluctuations and is considered to be less risky than FXNAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	USAIX	FXNAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.26%	1.41%	-0.15%
Volatility (6M) Calculated over the trailing 6-month period	2.55%	2.82%	-0.27%
Volatility (1Y) Calculated over the trailing 1-year period	3.55%	3.97%	-0.42%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.55%	6.07%	-0.52%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.65%	5.01%	-0.36%

USAIX vs. FXNAX - Expense Ratio Comparison

USAIX has a 0.44% expense ratio, which is higher than FXNAX's 0.03% expense ratio.

Dividends

USAIX vs. FXNAX - Dividend Comparison

USAIX's dividend yield for the trailing twelve months is around 4.06%, more than FXNAX's 3.71% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FXNAX Fidelity U.S. Bond Index Fund	3.71%	3.58%	3.40%	3.15%	1.81%	1.74%	2.92%	2.68%	2.74%	2.57%	2.76%	2.52%
USAIX USAA Income Fund	4.06%	3.36%	4.00%	3.70%	3.49%	4.84%	4.53%	3.66%	3.50%	3.51%	3.53%	3.65%

Frequently Asked Questions

Can I hold both USAIX and FXNAX in my portfolio?

With a correlation of 0.92, USAIX and FXNAX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, USAIX or FXNAX?

FXNAX has higher volatility (1.41%) compared to USAIX (1.26%). In terms of maximum drawdown, USAIX dropped -18.67% vs FXNAX's -19.51%.

Which has better risk-adjusted returns?

USAIX currently has the higher Sharpe Ratio (1.61 vs 1.36), 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.