FUMIX vs. FZILX

Last updated Jun 4, 2026

FUMIX (Fidelity SAI U.S. Momentum Index Fund) and FZILX (Fidelity ZERO International Index Fund) are both mutual funds - FUMIX is a Large Cap Growth Equities fund managed by Fidelity, while FZILX is a Foreign Large Cap Equities fund tracking the Fidelity Global ex U.S. Index. Over the past 5 years, FUMIX returned 17.10%/yr vs 9.43%/yr for FZILX. A 0.69 correlation means they provide meaningful diversification when combined. FUMIX charges 0.11%/yr vs 0.00%/yr for FZILX.

Performance

FUMIX vs. FZILX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI U.S. Momentum Index Fund (FUMIX) 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, FUMIX achieves a 26.12% return, which is significantly higher than FZILX's 16.29% return.

FUMIX

• 1D: 1.48%
• 1M: 12.10%
• YTD: 26.12%
• 6M: 26.26%
• 1Y: 33.30%
• 3Y*: 32.20%
• 5Y*: 17.10%
• 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)

FUMIX vs. FZILX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
FUMIX Fidelity SAI U.S. Momentum Index Fund	26.12%	17.01%	33.39%	14.67%	-15.79%	22.56%	29.92%	24.16%	-11.13%
FZILX Fidelity ZERO International Index Fund	16.29%	33.52%	5.32%	16.28%	-15.96%	8.19%	11.06%	21.69%	-9.38%

Correlation

The correlation between FUMIX and FZILX is 0.71, 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	0.71
Correlation (3Y) Calculated over the trailing 3-year period	0.66
Correlation (5Y) Calculated over the trailing 5-year period	0.69
Correlation (All Time) Calculated using the full available price history since Aug 17, 2018	0.69

The correlation between FUMIX and FZILX has been stable across timeframes, ranging from 0.66 to 0.71 - a consistent structural relationship.

Return for Risk

FUMIX vs. FZILX — Risk / Return Rank

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

FUMIX

FUMIX Risk / Return Rank: 55
FUMIX Sharpe Ratio Rank: 46
FUMIX Sortino Ratio Rank: 44
FUMIX Omega Ratio Rank: 45
FUMIX Calmar Ratio Rank: 65
FUMIX Martin Ratio Rank: 74

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.

FUMIX vs. FZILX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI U.S. Momentum Index Fund (FUMIX) 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.

	FUMIX	FZILX	Difference
Sharpe ratio: Return per unit of total volatility	1.99	2.34	-0.35
Sortino ratio: Return per unit of downside risk	2.79	3.18	-0.38
Omega ratio: Gain probability vs. loss probability	1.36	1.43	-0.07
Calmar ratio: Return relative to maximum drawdown	3.10	3.04	+0.06
Martin ratio: Return relative to average drawdown	14.10	11.91	+2.19
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FUMIX vs. FZILX - Sharpe Ratio Comparison

The current FUMIX Sharpe Ratio is 1.99, which is comparable to the FZILX Sharpe Ratio of 2.34. The chart below compares the historical Sharpe Ratios of FUMIX 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

	FUMIX	FZILX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.99	2.34	-0.35
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.81	0.61	+0.20
Sharpe Ratio (All Time) Calculated using the full available price history	0.81	0.59	+0.23

Drawdowns

FUMIX vs. FZILX - Drawdown Comparison

The maximum FUMIX drawdown since its inception was -33.36%, roughly equal to the maximum FZILX drawdown of -34.37%. Use the drawdown chart below to compare losses from any high point for FUMIX and FZILX.

Drawdown Indicators

	FUMIX	FZILX	Difference
Max Drawdown Largest peak-to-trough decline	-33.36%	-34.37%	+1.01%
Max Drawdown (1Y) Largest decline over 1 year	-10.99%	-11.24%	+0.25%
Max Drawdown (3Y) Largest decline over 3 years	-19.90%	-13.47%	-6.43%
Max Drawdown (5Y) Largest decline over 5 years	-27.66%	-29.87%	+2.21%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-6.32%	-6.69%	+0.37%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.41%	2.86%	-0.45%

Volatility

FUMIX vs. FZILX - Volatility Comparison

Fidelity SAI U.S. Momentum Index Fund (FUMIX) has a higher volatility of 6.51% compared to Fidelity ZERO International Index Fund (FZILX) at 4.96%. This indicates that FUMIX's price experiences larger fluctuations and is considered to be riskier than FZILX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FUMIX	FZILX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.51%	4.96%	+1.55%
Volatility (6M) Calculated over the trailing 6-month period	14.70%	12.26%	+2.44%
Volatility (1Y) Calculated over the trailing 1-year period	17.12%	14.62%	+2.50%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.17%	15.52%	+5.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.77%	17.32%	+4.45%

FUMIX vs. FZILX - Expense Ratio Comparison

FUMIX has a 0.11% expense ratio, which is higher than FZILX's 0.00% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

FUMIX vs. FZILX - Dividend Comparison

FUMIX's dividend yield for the trailing twelve months is around 2.20%, less than FZILX's 2.30% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FUMIX Fidelity SAI U.S. Momentum Index Fund	2.20%	2.77%	5.89%	18.09%	2.10%	20.67%	8.68%	2.09%	3.84%	0.88%
FZILX Fidelity ZERO International Index Fund	2.30%	2.67%	3.00%	2.98%	2.71%	2.61%	1.64%	2.37%	0.02%	0.00%

Frequently Asked Questions

Can I hold both FUMIX and FZILX in my portfolio?

FUMIX and FZILX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FUMIX or FZILX?

FUMIX has higher volatility (6.51%) compared to FZILX (4.96%). In terms of maximum drawdown, FUMIX dropped -33.36% vs FZILX's -34.37%.

Which has better risk-adjusted returns?

FZILX currently has the higher Sharpe Ratio (2.34 vs 1.99), 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.