FZILX vs. FXNAX

Last updated Aug 4, 2026

FZILX (Fidelity ZERO International Index Fund) and FXNAX (Fidelity U.S. Bond Index Fund) are both mutual funds - FZILX is a Foreign Large Cap Equities fund tracking the Fidelity Global ex U.S. Index, while FXNAX is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Bond Index. Both are passively managed. Over the past 5 years, FZILX returned 9.50%/yr vs -0.55%/yr for FXNAX. Their 0.08 correlation means their historical movements had little consistent relationship. FZILX charges 0.00%/yr vs 0.03%/yr for FXNAX.

Performance

FZILX vs. FXNAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity ZERO International Index Fund (FZILX) 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, FZILX achieves a 14.05% return, which is significantly higher than FXNAX's -0.92% return.

FZILX

• 1D: 0.00%
• 1M: 0.36%
• 6M: 7.28%
• YTD: 14.05%
• 1Y: 29.53%
• 3Y*: 18.09%
• 5Y*: 9.50%
• 10Y*: —
• ALL TIME*: 9.62%

FXNAX

• 1D: -0.29%
• 1M: -1.53%
• 6M: -1.05%
• YTD: -0.92%
• 1Y: 1.47%
• 3Y*: 3.79%
• 5Y*: -0.55%
• 10Y*: 1.24%
• ALL TIME*: 1.94%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
FXNAX Fidelity U.S. Bond Index Fund	$0.00	$0.00	$0.00
FZILX Fidelity ZERO International Index Fund	$0.00	$0.00	$0.00

FZILX vs. FXNAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
FZILX Fidelity ZERO International Index Fund	14.05%	33.52%	5.32%	16.28%	-15.96%	8.19%	11.06%	21.69%	-9.38%
FXNAX Fidelity U.S. Bond Index Fund	-0.92%	7.14%	1.35%	5.82%	-13.55%	-2.10%	7.63%	8.50%	1.28%

Correlation

The correlation between FZILX and FXNAX is 0.40, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.40
Correlation (3Y) Balances recent behavior with more history.	0.29
Correlation (5Y) Shows whether the relationship held over a longer period.	0.23
Correlation (All Time) Calculated using the full available price history since Aug 16, 2018	0.08

Over the past year, FZILX and FXNAX have become more correlated (0.40) than their long-term average of 0.08, meaning their price movements have been converging.

Return for Risk

FZILX vs. FXNAX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

FZILX

FZILX Risk / Return Rank: 74
FZILX Sharpe Ratio Rank: 74
FZILX Sortino Ratio Rank: 70
FZILX Omega Ratio Rank: 73
FZILX Calmar Ratio Rank: 77
FZILX Martin Ratio Rank: 76

FXNAX

FXNAX Risk / Return Rank: 14
FXNAX Sharpe Ratio Rank: 14
FXNAX Sortino Ratio Rank: 14
FXNAX Omega Ratio Rank: 13
FXNAX Calmar Ratio Rank: 15
FXNAX Martin Ratio Rank: 13

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

FZILX vs. FXNAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity ZERO International Index Fund (FZILX) 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.

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.

	FZILX	FXNAX	Difference
Sharpe ratio: Return per unit of total volatility	1.79	0.62	+1.18
Sortino ratio: Return per unit of downside risk	2.46	0.92	+1.54
Omega ratio: Gain probability vs. loss probability	1.33	1.11	+0.23
Calmar ratio: Return relative to maximum drawdown	2.60	0.80	+1.80
Martin ratio: Return relative to average drawdown	9.69	2.00	+7.69

FZILX vs. FXNAX - Sharpe Ratio Comparison

The current FZILX Sharpe Ratio is 1.79, which is higher than the FXNAX Sharpe Ratio of 0.62. The chart below compares the historical Sharpe Ratios of FZILX 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.

Drawdowns

FZILX vs. FXNAX - Drawdown Comparison

The maximum FZILX drawdown since its inception was -34.37%, which is greater than FXNAX's maximum drawdown of -19.51%. Use the drawdown chart below to compare losses from any high point for FZILX and FXNAX.

Drawdown Indicators

	FZILX	FXNAX	Difference
Max Drawdown Largest peak-to-trough decline	-34.37%	-19.51%	-14.86%
Max Drawdown (1Y) Largest decline over 1 year	-11.24%	-2.94%	-8.30%
Max Drawdown (3Y) Largest decline over 3 years	-13.47%	-5.11%	-8.36%
Max Drawdown (5Y) Largest decline over 5 years	-29.87%	-18.39%	-11.48%
Max Drawdown (10Y) Largest decline over 10 years	—	-19.51%	—
Current Drawdown Current decline from peak	-2.15%	-4.17%	+2.02%
Average Drawdown Average peak-to-trough decline	-6.60%	-3.86%	-2.74%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.01%	1.18%	+1.83%

Volatility

FZILX vs. FXNAX - Volatility Comparison

Fidelity ZERO International Index Fund (FZILX) has a higher volatility of 5.15% compared to Fidelity U.S. Bond Index Fund (FXNAX) at 1.01%. This indicates that FZILX's price experiences larger fluctuations and is considered to be riskier than FXNAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FZILX	FXNAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.15%	1.01%	+4.14%
Volatility (6M) Calculated over the trailing 6-month period	14.45%	3.03%	+11.42%
Volatility (1Y) Calculated over the trailing 1-year period	16.35%	3.85%	+12.50%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.85%	6.07%	+9.78%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.40%	5.01%	+12.39%

FZILX vs. FXNAX - Expense Ratio Comparison

FZILX has a 0.00% expense ratio, which is lower than FXNAX's 0.03% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

FZILX vs. FXNAX - Dividend Comparison

FZILX's dividend yield for the trailing twelve months is around 2.35%, less than FXNAX's 3.47% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FXNAX Fidelity U.S. Bond Index Fund	3.47%	3.58%	3.40%	3.15%	1.81%	1.74%	2.92%	2.68%	2.74%	2.57%	2.76%	2.52%
FZILX Fidelity ZERO International Index Fund	2.35%	2.67%	3.00%	2.98%	2.71%	2.61%	1.64%	2.37%	0.02%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FZILX and FXNAX in my portfolio?

FZILX and FXNAX have a correlation of 0.40, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FZILX or FXNAX?

FZILX has higher volatility (5.15%) compared to FXNAX (1.01%). In terms of maximum drawdown, FZILX dropped -34.37% vs FXNAX's -19.51%.

Which has better risk-adjusted returns?

FZILX currently has the higher Sharpe Ratio (1.79 vs 0.62), 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.