AAIEX vs. MGRDX

Last updated Jun 3, 2026

AAIEX (American Beacon International Equity Fund) and MGRDX (MFS International Growth Fund R6) are both Foreign Large Cap Equities funds. Over the past 10 years, AAIEX returned 8.61%/yr vs 10.01%/yr for MGRDX. Their correlation of 0.91 suggests significant overlap in exposure. Both charge a 0.72% expense ratio.

Performance

AAIEX vs. MGRDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Beacon International Equity Fund (AAIEX) and MFS International Growth Fund R6 (MGRDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AAIEX achieves a 7.54% return, which is significantly higher than MGRDX's 3.71% return. Over the past 10 years, AAIEX has underperformed MGRDX with an annualized return of 8.61%, while MGRDX has yielded a comparatively higher 10.01% annualized return.

AAIEX

• 1D: -0.31%
• 1M: 4.22%
• YTD: 7.54%
• 6M: 12.18%
• 1Y: 23.98%
• 3Y*: 17.69%
• 5Y*: 9.70%
• 10Y*: 8.61%

MGRDX

• 1D: -0.22%
• 1M: 2.67%
• YTD: 3.71%
• 6M: 4.91%
• 1Y: 10.65%
• 3Y*: 12.45%
• 5Y*: 6.29%
• 10Y*: 10.01%

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

AAIEX vs. MGRDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AAIEX American Beacon International Equity Fund	7.54%	37.12%	2.16%	22.54%	-10.87%	9.74%	1.06%	19.44%	-16.42%	24.83%
MGRDX MFS International Growth Fund R6	3.71%	21.18%	9.22%	14.99%	-15.00%	9.61%	15.82%	27.32%	-8.79%	32.56%

Correlation

The correlation between AAIEX and MGRDX is 0.87, 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	0.87
Correlation (3Y) Calculated over the trailing 3-year period	0.88
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (10Y) Calculated over the trailing 10-year period	0.87
Correlation (All Time) Calculated using the full available price history since May 1, 2006	0.91

The correlation between AAIEX and MGRDX has been stable across timeframes, ranging from 0.87 to 0.91 - a consistent structural relationship.

Return for Risk

AAIEX vs. MGRDX — Risk / Return Rank

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

AAIEX

AAIEX Risk / Return Rank: 28
AAIEX Sharpe Ratio Rank: 31
AAIEX Sortino Ratio Rank: 32
AAIEX Omega Ratio Rank: 33
AAIEX Calmar Ratio Rank: 21
AAIEX Martin Ratio Rank: 22

MGRDX

MGRDX Risk / Return Rank: 10
MGRDX Sharpe Ratio Rank: 11
MGRDX Sortino Ratio Rank: 11
MGRDX Omega Ratio Rank: 10
MGRDX Calmar Ratio Rank: 9
MGRDX Martin Ratio Rank: 10

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.

AAIEX vs. MGRDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Beacon International Equity Fund (AAIEX) and MFS International Growth Fund R6 (MGRDX). 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.

	AAIEX	MGRDX	Difference
Sharpe ratio Return per unit of total volatility	1.63	0.88	+0.74
Sortino ratio Return per unit of downside risk	2.38	1.32	+1.07
Omega ratio Gain probability vs. loss probability	1.30	1.16	+0.14
Calmar ratio Return relative to maximum drawdown	1.74	0.95	+0.79
Martin ratio Return relative to average drawdown	5.80	3.22	+2.58
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AAIEX vs. MGRDX - Sharpe Ratio Comparison

The current AAIEX Sharpe Ratio is 1.63, which is higher than the MGRDX Sharpe Ratio of 0.88. The chart below compares the historical Sharpe Ratios of AAIEX and MGRDX, 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

	AAIEX	MGRDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.63	0.88	+0.74
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.46	0.40	+0.05
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.43	0.64	-0.21
Sharpe Ratio (All Time) Calculated using the full available price history	0.36	0.29	+0.06

Drawdowns

AAIEX vs. MGRDX - Drawdown Comparison

The maximum AAIEX drawdown since its inception was -59.31%, roughly equal to the maximum MGRDX drawdown of -60.75%. Use the drawdown chart below to compare losses from any high point for AAIEX and MGRDX.

Drawdown Indicators

	AAIEX	MGRDX	Difference
Max Drawdown Largest peak-to-trough decline	-59.31%	-60.75%	+1.44%
Max Drawdown (1Y) Largest decline over 1 year	-13.67%	-12.39%	-1.28%
Max Drawdown (3Y) Largest decline over 3 years	-21.20%	-13.58%	-7.62%
Max Drawdown (5Y) Largest decline over 5 years	-29.21%	-30.60%	+1.39%
Max Drawdown (10Y) Largest decline over 10 years	-43.34%	-30.60%	-12.74%
Current Drawdown Current decline from peak	-2.59%	-3.15%	+0.56%
Average Drawdown Average peak-to-trough decline	-11.26%	-12.43%	+1.17%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.11%	3.66%	+0.45%

Volatility

AAIEX vs. MGRDX - Volatility Comparison

American Beacon International Equity Fund (AAIEX) has a higher volatility of 4.51% compared to MFS International Growth Fund R6 (MGRDX) at 3.94%. This indicates that AAIEX's price experiences larger fluctuations and is considered to be riskier than MGRDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AAIEX	MGRDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.51%	3.94%	+0.57%
Volatility (6M) Calculated over the trailing 6-month period	11.94%	10.68%	+1.26%
Volatility (1Y) Calculated over the trailing 1-year period	14.92%	13.28%	+1.64%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.41%	15.62%	+5.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.30%	15.77%	+4.53%

AAIEX vs. MGRDX - Expense Ratio Comparison

Both AAIEX and MGRDX have an expense ratio of 0.72%.

Dividends

AAIEX vs. MGRDX - Dividend Comparison

AAIEX's dividend yield for the trailing twelve months is around 11.76%, more than MGRDX's 5.43% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AAIEX American Beacon International Equity Fund	11.76%	12.65%	24.49%	5.36%	2.76%	10.99%	1.63%	2.93%	9.71%	3.15%	2.51%	2.45%
MGRDX MFS International Growth Fund R6	5.43%	5.63%	6.35%	2.90%	3.06%	6.97%	0.80%	1.51%	4.20%	2.61%	1.45%	1.20%

Frequently Asked Questions

Can I hold both AAIEX and MGRDX in my portfolio?

AAIEX and MGRDX have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AAIEX or MGRDX?

AAIEX has higher volatility (4.51%) compared to MGRDX (3.94%). In terms of maximum drawdown, AAIEX dropped -59.31% vs MGRDX's -60.75%.

Which has better risk-adjusted returns?

AAIEX currently has the higher Sharpe Ratio (1.63 vs 0.88), 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.