MGLBX vs. MIOFX

Last updated Jun 25, 2026

MGLBX (Marsico Global Fund) and MIOFX (Marsico International Opportunities Fund) are both mutual funds - MGLBX is a Global Equities fund managed by Marsico Investment Fund, while MIOFX is a Foreign Large Cap Equities fund managed by Marsico Investment Fund. Over the past 10 years, MGLBX returned 20.22%/yr vs 12.84%/yr for MIOFX. Their correlation of 0.87 suggests significant overlap in exposure. MGLBX charges 1.45%/yr vs 1.50%/yr for MIOFX.

Performance

MGLBX vs. MIOFX - Performance Comparison

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

Returns By Period

In the year-to-date period, MGLBX achieves a 15.34% return, which is significantly higher than MIOFX's 11.58% return. Over the past 10 years, MGLBX has outperformed MIOFX with an annualized return of 20.22%, while MIOFX has yielded a comparatively lower 12.84% annualized return.

MGLBX

• 1D: -3.61%
• 1M: 1.92%
• YTD: 15.34%
• 6M: 14.04%
• 1Y: 24.13%
• 3Y*: 31.28%
• 5Y*: 12.90%
• 10Y*: 20.22%

MIOFX

• 1D: -3.30%
• 1M: 3.34%
• YTD: 11.58%
• 6M: 10.32%
• 1Y: 18.27%
• 3Y*: 27.45%
• 5Y*: 11.15%
• 10Y*: 12.84%

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

MGLBX vs. MIOFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MGLBX Marsico Global Fund	15.34%	27.15%	40.57%	35.38%	-34.54%	10.96%	81.92%	27.18%	-4.50%	40.25%
MIOFX Marsico International Opportunities Fund	11.58%	28.54%	36.31%	17.96%	-23.71%	4.93%	20.59%	31.39%	-18.18%	44.09%

Correlation

The correlation between MGLBX and MIOFX is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.95
Correlation (5Y) Calculated over the trailing 5-year period	0.90
Correlation (10Y) Calculated over the trailing 10-year period	0.86
Correlation (All Time) Calculated using the full available price history since Jun 29, 2007	0.87

The correlation between MGLBX and MIOFX has been stable across timeframes, ranging from 0.86 to 0.95 - a consistent structural relationship.

Return for Risk

MGLBX vs. MIOFX — Risk / Return Rank

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

MGLBX

MGLBX Risk / Return Rank: 28
MGLBX Sharpe Ratio Rank: 25
MGLBX Sortino Ratio Rank: 25
MGLBX Omega Ratio Rank: 25
MGLBX Calmar Ratio Rank: 28
MGLBX Martin Ratio Rank: 36

MIOFX

MIOFX Risk / Return Rank: 18
MIOFX Sharpe Ratio Rank: 16
MIOFX Sortino Ratio Rank: 18
MIOFX Omega Ratio Rank: 17
MIOFX Calmar Ratio Rank: 19
MIOFX Martin Ratio Rank: 20

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. MIOFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Marsico Global Fund (MGLBX) and Marsico International Opportunities Fund (MIOFX). 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.

	MGLBX	MIOFX	Difference
Sharpe ratio: Return per unit of total volatility	1.27	0.99	+0.28
Sortino ratio: Return per unit of downside risk	1.85	1.53	+0.33
Omega ratio: Gain probability vs. loss probability	1.23	1.19	+0.04
Calmar ratio: Return relative to maximum drawdown	1.80	1.37	+0.44
Martin ratio: Return relative to average drawdown	7.38	4.40	+2.99

MGLBX vs. MIOFX - Sharpe Ratio Comparison

The current MGLBX Sharpe Ratio is 1.27, which is comparable to the MIOFX Sharpe Ratio of 0.99. The chart below compares the historical Sharpe Ratios of MGLBX and MIOFX, 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

MGLBX vs. MIOFX - Drawdown Comparison

The maximum MGLBX drawdown since its inception was -59.60%, smaller than the maximum MIOFX drawdown of -63.83%. Use the drawdown chart below to compare losses from any high point for MGLBX and MIOFX.

Drawdown Indicators

	MGLBX	MIOFX	Difference
Max Drawdown Largest peak-to-trough decline	-59.60%	-63.83%	+4.23%
Max Drawdown (1Y) Largest decline over 1 year	-14.92%	-15.37%	+0.45%
Max Drawdown (3Y) Largest decline over 3 years	-20.66%	-17.52%	-3.14%
Max Drawdown (5Y) Largest decline over 5 years	-43.08%	-38.75%	-4.33%
Max Drawdown (10Y) Largest decline over 10 years	-43.08%	-38.75%	-4.33%
Current Drawdown Current decline from peak	-3.61%	-3.83%	+0.22%
Average Drawdown Average peak-to-trough decline	-11.53%	-17.10%	+5.57%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.64%	4.77%	-1.13%

Volatility

MGLBX vs. MIOFX - Volatility Comparison

Marsico Global Fund (MGLBX) and Marsico International Opportunities Fund (MIOFX) have volatilities of 9.31% and 9.01%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGLBX	MIOFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.31%	9.01%	+0.30%
Volatility (6M) Calculated over the trailing 6-month period	17.97%	18.22%	-0.25%
Volatility (1Y) Calculated over the trailing 1-year period	21.27%	21.29%	-0.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.30%	20.23%	+2.07%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.17%	18.72%	+4.45%

MGLBX vs. MIOFX - Expense Ratio Comparison

MGLBX has a 1.45% expense ratio, which is lower than MIOFX's 1.50% expense ratio.

Dividends

MGLBX vs. MIOFX - Dividend Comparison

MGLBX's dividend yield for the trailing twelve months is around 10.52%, more than MIOFX's 4.25% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MGLBX Marsico Global Fund	10.52%	12.13%	3.42%	1.98%	4.37%	17.97%	24.53%	0.00%	1.16%	9.25%	0.00%	11.04%
MIOFX Marsico International Opportunities Fund	4.25%	4.75%	4.95%	0.38%	0.17%	13.41%	2.44%	4.20%	9.36%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both MGLBX and MIOFX in my portfolio?

With a correlation of 0.95, MGLBX and MIOFX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, MGLBX or MIOFX?

MGLBX has higher volatility (9.31%) compared to MIOFX (9.01%). In terms of maximum drawdown, MGLBX dropped -59.60% vs MIOFX's -63.83%.

Which has better risk-adjusted returns?

MGLBX currently has the higher Sharpe Ratio (1.27 vs 0.99), 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.