MGLBX vs. FITLX

Last updated Jun 4, 2026

MGLBX (Marsico Global Fund) and FITLX (Fidelity US Sustainability Index Fund) are both mutual funds - MGLBX is a Global Equities fund managed by Marsico Investment Fund, while FITLX is a Large Cap Blend Equities fund managed by Fidelity. Over the past 5 years, MGLBX returned 14.37%/yr vs 14.20%/yr for FITLX. Their correlation of 0.84 suggests significant overlap in exposure. MGLBX charges 1.45%/yr vs 0.11%/yr for FITLX.

Performance

MGLBX vs. FITLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Marsico Global Fund (MGLBX) and Fidelity US Sustainability Index Fund (FITLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MGLBX achieves a 17.17% return, which is significantly higher than FITLX's 10.47% return.

MGLBX

• 1D: 0.59%
• 1M: 9.21%
• YTD: 17.17%
• 6M: 19.54%
• 1Y: 30.29%
• 3Y*: 32.53%
• 5Y*: 14.37%
• 10Y*: 19.78%

FITLX

• 1D: -0.44%
• 1M: 5.58%
• YTD: 10.47%
• 6M: 11.11%
• 1Y: 28.82%
• 3Y*: 22.72%
• 5Y*: 14.20%
• 10Y*: —

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

MGLBX vs. FITLX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MGLBX Marsico Global Fund	17.17%	27.15%	40.57%	35.38%	-34.54%	10.96%	81.92%	27.18%	-4.50%	19.82%
FITLX Fidelity US Sustainability Index Fund	10.47%	18.77%	23.59%	29.04%	-20.28%	31.55%	18.69%	31.54%	-3.32%	13.07%

Correlation

The correlation between MGLBX and FITLX is 0.78, 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	0.78
Correlation (3Y) Calculated over the trailing 3-year period	0.84
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (All Time) Calculated using the full available price history since May 10, 2017	0.84

The correlation between MGLBX and FITLX has been stable across timeframes, ranging from 0.78 to 0.88 - a consistent structural relationship.

Return for Risk

MGLBX vs. FITLX — Risk / Return Rank

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

MGLBX

MGLBX Risk / Return Rank: 32
MGLBX Sharpe Ratio Rank: 31
MGLBX Sortino Ratio Rank: 30
MGLBX Omega Ratio Rank: 30
MGLBX Calmar Ratio Rank: 31
MGLBX Martin Ratio Rank: 40

FITLX

FITLX Risk / Return Rank: 57
FITLX Sharpe Ratio Rank: 63
FITLX Sortino Ratio Rank: 59
FITLX Omega Ratio Rank: 57
FITLX Calmar Ratio Rank: 49
FITLX Martin Ratio Rank: 58

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.

MGLBX vs. FITLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Marsico Global Fund (MGLBX) and Fidelity US Sustainability Index Fund (FITLX). 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.

	MGLBX	FITLX	Difference
Sharpe ratio Return per unit of total volatility	1.59	2.33	-0.75
Sortino ratio Return per unit of downside risk	2.29	3.23	-0.94
Omega ratio Gain probability vs. loss probability	1.29	1.42	-0.13
Calmar ratio Return relative to maximum drawdown	2.08	2.67	-0.59
Martin ratio Return relative to average drawdown	8.64	11.60	-2.95
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MGLBX vs. FITLX - Sharpe Ratio Comparison

The current MGLBX Sharpe Ratio is 1.59, which is lower than the FITLX Sharpe Ratio of 2.33. The chart below compares the historical Sharpe Ratios of MGLBX and FITLX, 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

	MGLBX	FITLX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.59	2.33	-0.75
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.66	0.81	-0.15
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.86	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.57	0.82	-0.25

Drawdowns

MGLBX vs. FITLX - Drawdown Comparison

The maximum MGLBX drawdown since its inception was -59.60%, which is greater than FITLX's maximum drawdown of -34.35%. Use the drawdown chart below to compare losses from any high point for MGLBX and FITLX.

Drawdown Indicators

	MGLBX	FITLX	Difference
Max Drawdown Largest peak-to-trough decline	-59.60%	-34.35%	-25.25%
Max Drawdown (1Y) Largest decline over 1 year	-14.92%	-11.15%	-3.77%
Max Drawdown (3Y) Largest decline over 3 years	-20.66%	-19.99%	-0.67%
Max Drawdown (5Y) Largest decline over 5 years	-43.08%	-26.91%	-16.17%
Max Drawdown (10Y) Largest decline over 10 years	-43.08%	—	—
Current Drawdown Current decline from peak	0.00%	-0.44%	+0.44%
Average Drawdown Average peak-to-trough decline	-11.56%	-5.07%	-6.49%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.58%	2.56%	+1.02%

Volatility

MGLBX vs. FITLX - Volatility Comparison

Marsico Global Fund (MGLBX) has a higher volatility of 6.62% compared to Fidelity US Sustainability Index Fund (FITLX) at 3.56%. This indicates that MGLBX's price experiences larger fluctuations and is considered to be riskier than FITLX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGLBX	FITLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.62%	3.56%	+3.06%
Volatility (6M) Calculated over the trailing 6-month period	16.11%	9.77%	+6.34%
Volatility (1Y) Calculated over the trailing 1-year period	19.54%	12.76%	+6.78%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.97%	17.58%	+4.39%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.06%	19.10%	+3.96%

MGLBX vs. FITLX - Expense Ratio Comparison

MGLBX has a 1.45% expense ratio, which is higher than FITLX's 0.11% expense ratio.

Dividends

MGLBX vs. FITLX - Dividend Comparison

MGLBX's dividend yield for the trailing twelve months is around 10.35%, more than FITLX's 1.00% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FITLX Fidelity US Sustainability Index Fund	1.00%	1.11%	1.29%	1.12%	1.49%	0.99%	1.01%	1.41%	1.58%	0.76%	0.00%	0.00%
MGLBX Marsico Global Fund	10.35%	12.13%	3.42%	1.98%	4.37%	17.97%	24.53%	0.00%	1.16%	9.25%	0.00%	11.04%

Frequently Asked Questions

Can I hold both MGLBX and FITLX in my portfolio?

MGLBX and FITLX have a correlation of 0.78, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MGLBX or FITLX?

MGLBX has higher volatility (6.62%) compared to FITLX (3.56%). In terms of maximum drawdown, MGLBX dropped -59.60% vs FITLX's -34.35%.

Which has better risk-adjusted returns?

FITLX currently has the higher Sharpe Ratio (2.33 vs 1.59), 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.