FAPDX vs. FXNAX

Last updated Jun 3, 2026

FAPDX (Fidelity Sustainable Low Duration Bond FundFidelity SAI Sustainable Emerging Markets Equity Fund) and FXNAX (Fidelity U.S. Bond Index Fund) are both mutual funds - FAPDX is a Ultrashort Bond fund managed by Fidelity, while FXNAX is a Total Bond Market fund managed by Fidelity. Over the past 3 years, FAPDX returned 4.82%/yr vs 4.02%/yr for FXNAX. At a 0.42 correlation, their price movements are largely independent. FAPDX charges 0.35%/yr vs 0.03%/yr for FXNAX.

Performance

FAPDX vs. FXNAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Sustainable Low Duration Bond FundFidelity SAI Sustainable Emerging Markets Equity Fund (FAPDX) 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, FAPDX achieves a 1.39% return, which is significantly higher than FXNAX's 0.40% return.

FAPDX

• 1D: 0.00%
• 1M: 0.26%
• YTD: 1.39%
• 6M: 1.75%
• 1Y: 4.11%
• 3Y*: 4.82%
• 5Y*: —
• 10Y*: —

FXNAX

• 1D: -0.10%
• 1M: 0.13%
• YTD: 0.40%
• 6M: 0.43%
• 1Y: 5.37%
• 3Y*: 4.02%
• 5Y*: 0.09%
• 10Y*: 1.51%

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

FAPDX vs. FXNAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
FAPDX Fidelity Sustainable Low Duration Bond FundFidelity SAI Sustainable Emerging Markets Equity Fund	1.39%	4.57%	5.32%	5.03%	0.57%
FXNAX Fidelity U.S. Bond Index Fund	0.40%	7.14%	1.35%	5.82%	-6.06%

Correlation

The correlation between FAPDX and FXNAX is 0.51, 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	0.51
Correlation (3Y) Calculated over the trailing 3-year period	0.43
Correlation (All Time) Calculated using the full available price history since Apr 14, 2022	0.42

The correlation between FAPDX and FXNAX has been stable across timeframes, ranging from 0.42 to 0.51 - a consistent structural relationship.

Return for Risk

FAPDX vs. FXNAX — Risk / Return Rank

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

FAPDX

FAPDX Risk / Return Rank: 99
FAPDX Sharpe Ratio Rank: 97
FAPDX Sortino Ratio Rank: 99
FAPDX Omega Ratio Rank: 99
FAPDX Calmar Ratio Rank: 99
FAPDX Martin Ratio Rank: 99

FXNAX

FXNAX Risk / Return Rank: 20
FXNAX Sharpe Ratio Rank: 18
FXNAX Sortino Ratio Rank: 20
FXNAX Omega Ratio Rank: 18
FXNAX Calmar Ratio Rank: 24
FXNAX Martin Ratio Rank: 22

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.

FAPDX vs. FXNAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Sustainable Low Duration Bond FundFidelity SAI Sustainable Emerging Markets Equity Fund (FAPDX) 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.

	FAPDX	FXNAX	Difference
Sharpe ratio Return per unit of total volatility	3.72	1.28	+2.44
Sortino ratio Return per unit of downside risk	9.97	1.93	+8.04
Omega ratio Gain probability vs. loss probability	3.36	1.23	+2.14
Calmar ratio Return relative to maximum drawdown	14.75	1.90	+12.85
Martin ratio Return relative to average drawdown	67.88	5.85	+62.03
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FAPDX vs. FXNAX - Sharpe Ratio Comparison

The current FAPDX Sharpe Ratio is 3.72, which is higher than the FXNAX Sharpe Ratio of 1.28. The chart below compares the historical Sharpe Ratios of FAPDX 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

	FAPDX	FXNAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.72	1.28	+2.44
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.01	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.30	—
Sharpe Ratio (All Time) Calculated using the full available price history	4.00	0.45	+3.55

Drawdowns

FAPDX vs. FXNAX - Drawdown Comparison

The maximum FAPDX drawdown since its inception was -0.49%, smaller than the maximum FXNAX drawdown of -19.51%. Use the drawdown chart below to compare losses from any high point for FAPDX and FXNAX.

Drawdown Indicators

	FAPDX	FXNAX	Difference
Max Drawdown Largest peak-to-trough decline	-0.49%	-19.51%	+19.02%
Max Drawdown (1Y) Largest decline over 1 year	-0.29%	-2.94%	+2.65%
Max Drawdown (3Y) Largest decline over 3 years	-0.29%	-6.16%	+5.87%
Max Drawdown (5Y) Largest decline over 5 years	—	-18.54%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-19.51%	—
Current Drawdown Current decline from peak	0.00%	-2.89%	+2.89%
Average Drawdown Average peak-to-trough decline	-0.06%	-3.87%	+3.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.06%	0.96%	-0.90%

Volatility

FAPDX vs. FXNAX - Volatility Comparison

The current volatility for Fidelity Sustainable Low Duration Bond FundFidelity SAI Sustainable Emerging Markets Equity Fund (FAPDX) is 0.26%, while Fidelity U.S. Bond Index Fund (FXNAX) has a volatility of 1.42%. This indicates that FAPDX 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

	FAPDX	FXNAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.26%	1.42%	-1.16%
Volatility (6M) Calculated over the trailing 6-month period	0.86%	2.82%	-1.96%
Volatility (1Y) Calculated over the trailing 1-year period	1.11%	3.98%	-2.87%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.03%	6.07%	-5.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.03%	5.01%	-3.98%

FAPDX vs. FXNAX - Expense Ratio Comparison

FAPDX has a 0.35% expense ratio, which is higher than FXNAX's 0.03% expense ratio.

Dividends

FAPDX vs. FXNAX - Dividend Comparison

FAPDX's dividend yield for the trailing twelve months is around 4.63%, more than FXNAX's 3.71% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FAPDX Fidelity Sustainable Low Duration Bond FundFidelity SAI Sustainable Emerging Markets Equity Fund	4.63%	4.40%	4.81%	3.21%	0.77%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
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%

Frequently Asked Questions

Can I hold both FAPDX and FXNAX in my portfolio?

FAPDX and FXNAX have a correlation of 0.51, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FAPDX or FXNAX?

FXNAX has higher volatility (1.42%) compared to FAPDX (0.26%). In terms of maximum drawdown, FAPDX dropped -0.49% vs FXNAX's -19.51%.

Which has better risk-adjusted returns?

FAPDX currently has the higher Sharpe Ratio (3.72 vs 1.28), 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.