FIDEX vs. FZILX

Last updated Jun 4, 2026

FIDEX (Fidelity SAI Sustainable U.S. Equity Fund) and FZILX (Fidelity ZERO International Index Fund) are both mutual funds - FIDEX is a Large Cap Blend Equities fund actively managed by Fidelity, while FZILX is a Foreign Large Cap Equities fund tracking the Fidelity Global ex U.S. Index. FIDEX is actively managed, while FZILX is passively managed. Over the past 3 years, FIDEX returned 20.90%/yr vs 20.62%/yr for FZILX. A 0.78 correlation means they provide meaningful diversification when combined. FIDEX charges 0.56%/yr vs 0.00%/yr for FZILX.

Performance

FIDEX vs. FZILX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) and Fidelity ZERO International Index Fund (FZILX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FIDEX achieves a 13.79% return, which is significantly lower than FZILX's 16.29% return.

FIDEX

• 1D: 0.42%
• 1M: 6.15%
• YTD: 13.79%
• 6M: 13.98%
• 1Y: 32.88%
• 3Y*: 20.90%
• 5Y*: —
• 10Y*: —

FZILX

• 1D: 0.71%
• 1M: 6.20%
• YTD: 16.29%
• 6M: 19.11%
• 1Y: 34.60%
• 3Y*: 20.62%
• 5Y*: 9.43%
• 10Y*: —

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

FIDEX vs. FZILX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
FIDEX Fidelity SAI Sustainable U.S. Equity Fund	13.79%	15.80%	21.44%	24.99%	-8.88%
FZILX Fidelity ZERO International Index Fund	16.29%	33.52%	5.32%	16.28%	-5.30%

Correlation

The correlation between FIDEX and FZILX is 0.80, 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	0.80
Correlation (3Y) Calculated over the trailing 3-year period	0.75
Correlation (All Time) Calculated using the full available price history since Apr 26, 2022	0.78

The correlation between FIDEX and FZILX has been stable across timeframes, ranging from 0.75 to 0.80 - a consistent structural relationship.

Return for Risk

FIDEX vs. FZILX — Risk / Return Rank

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

FIDEX

FIDEX Risk / Return Rank: 70
FIDEX Sharpe Ratio Rank: 69
FIDEX Sortino Ratio Rank: 63
FIDEX Omega Ratio Rank: 60
FIDEX Calmar Ratio Rank: 73
FIDEX Martin Ratio Rank: 84

FZILX

FZILX Risk / Return Rank: 60
FZILX Sharpe Ratio Rank: 64
FZILX Sortino Ratio Rank: 57
FZILX Omega Ratio Rank: 60
FZILX Calmar Ratio Rank: 62
FZILX Martin Ratio Rank: 60

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.

FIDEX vs. FZILX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) and Fidelity ZERO International Index Fund (FZILX). 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.

	FIDEX	FZILX	Difference
Sharpe ratio: Return per unit of total volatility	2.43	2.34	+0.10
Sortino ratio: Return per unit of downside risk	3.33	3.18	+0.15
Omega ratio: Gain probability vs. loss probability	1.43	1.43	0.00
Calmar ratio: Return relative to maximum drawdown	3.33	3.04	+0.29
Martin ratio: Return relative to average drawdown	15.95	11.91	+4.04
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FIDEX vs. FZILX - Sharpe Ratio Comparison

The current FIDEX Sharpe Ratio is 2.43, which is comparable to the FZILX Sharpe Ratio of 2.34. The chart below compares the historical Sharpe Ratios of FIDEX and FZILX, 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

	FIDEX	FZILX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.43	2.34	+0.10
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.61	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.86	0.59	+0.27

Drawdowns

FIDEX vs. FZILX - Drawdown Comparison

The maximum FIDEX drawdown since its inception was -21.90%, smaller than the maximum FZILX drawdown of -34.37%. Use the drawdown chart below to compare losses from any high point for FIDEX and FZILX.

Drawdown Indicators

	FIDEX	FZILX	Difference
Max Drawdown Largest peak-to-trough decline	-21.90%	-34.37%	+12.47%
Max Drawdown (1Y) Largest decline over 1 year	-10.13%	-11.24%	+1.11%
Max Drawdown (3Y) Largest decline over 3 years	-21.90%	-13.47%	-8.43%
Max Drawdown (5Y) Largest decline over 5 years	—	-29.87%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-3.70%	-6.69%	+2.99%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.11%	2.86%	-0.75%

Volatility

FIDEX vs. FZILX - Volatility Comparison

The current volatility for Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) is 3.92%, while Fidelity ZERO International Index Fund (FZILX) has a volatility of 4.96%. This indicates that FIDEX experiences smaller price fluctuations and is considered to be less risky than FZILX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FIDEX	FZILX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.92%	4.96%	-1.04%
Volatility (6M) Calculated over the trailing 6-month period	10.80%	12.26%	-1.46%
Volatility (1Y) Calculated over the trailing 1-year period	13.86%	14.62%	-0.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.47%	15.52%	+2.95%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.47%	17.32%	+1.15%

FIDEX vs. FZILX - Expense Ratio Comparison

FIDEX has a 0.56% expense ratio, which is higher than FZILX's 0.00% expense ratio.

Dividends

FIDEX vs. FZILX - Dividend Comparison

FIDEX's dividend yield for the trailing twelve months is around 1.38%, less than FZILX's 2.30% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
FIDEX Fidelity SAI Sustainable U.S. Equity Fund	1.38%	1.64%	1.87%	0.46%	0.63%	0.00%	0.00%	0.00%	0.00%
FZILX Fidelity ZERO International Index Fund	2.30%	2.67%	3.00%	2.98%	2.71%	2.61%	1.64%	2.37%	0.02%

Frequently Asked Questions

Can I hold both FIDEX and FZILX in my portfolio?

FIDEX and FZILX have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FIDEX or FZILX?

FZILX has higher volatility (4.96%) compared to FIDEX (3.92%). In terms of maximum drawdown, FIDEX dropped -21.90% vs FZILX's -34.37%.

Which has better risk-adjusted returns?

FIDEX currently has the higher Sharpe Ratio (2.43 vs 2.34), 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.