AADBX vs. STMGX

Last updated Jun 4, 2026

AADBX (American Beacon Balanced Fund) and STMGX (American Beacon Stephens Mid-Cap Growth Fund) are both mutual funds - AADBX is a Diversified Portfolio fund managed by American Beacon, while STMGX is a Mid Cap Growth Equities fund managed by American Beacon. Over the past 10 years, AADBX returned 8.81%/yr vs 13.85%/yr for STMGX. A 0.79 correlation means they provide meaningful diversification when combined. AADBX charges 0.72%/yr vs 1.14%/yr for STMGX.

Performance

AADBX vs. STMGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Beacon Balanced Fund (AADBX) and American Beacon Stephens Mid-Cap Growth Fund (STMGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AADBX achieves a 5.84% return, which is significantly lower than STMGX's 11.65% return. Over the past 10 years, AADBX has underperformed STMGX with an annualized return of 8.81%, while STMGX has yielded a comparatively higher 13.85% annualized return.

AADBX

• 1D: 0.58%
• 1M: 2.81%
• YTD: 5.84%
• 6M: 6.64%
• 1Y: 16.59%
• 3Y*: 12.84%
• 5Y*: 6.71%
• 10Y*: 8.81%

STMGX

• 1D: 0.71%
• 1M: 8.63%
• YTD: 11.65%
• 6M: 10.19%
• 1Y: 21.54%
• 3Y*: 17.25%
• 5Y*: 7.34%
• 10Y*: 13.85%

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

AADBX vs. STMGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AADBX American Beacon Balanced Fund	5.84%	11.65%	10.54%	12.35%	-7.55%	16.73%	6.30%	22.57%	-8.11%	12.54%
STMGX American Beacon Stephens Mid-Cap Growth Fund	11.65%	12.98%	13.16%	25.22%	-28.31%	12.29%	39.82%	31.31%	1.71%	27.97%

Correlation

The correlation between AADBX and STMGX is 0.74, 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	0.74
Correlation (3Y) Calculated over the trailing 3-year period	0.76
Correlation (5Y) Calculated over the trailing 5-year period	0.78
Correlation (10Y) Calculated over the trailing 10-year period	0.73
Correlation (All Time) Calculated using the full available price history since Feb 3, 2006	0.79

The correlation between AADBX and STMGX has been stable across timeframes, ranging from 0.73 to 0.79 - a consistent structural relationship.

Return for Risk

AADBX vs. STMGX — Risk / Return Rank

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

AADBX

AADBX Risk / Return Rank: 56
AADBX Sharpe Ratio Rank: 53
AADBX Sortino Ratio Rank: 57
AADBX Omega Ratio Rank: 50
AADBX Calmar Ratio Rank: 68
AADBX Martin Ratio Rank: 55

STMGX

STMGX Risk / Return Rank: 26
STMGX Sharpe Ratio Rank: 24
STMGX Sortino Ratio Rank: 23
STMGX Omega Ratio Rank: 21
STMGX Calmar Ratio Rank: 32
STMGX Martin Ratio Rank: 33

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.

AADBX vs. STMGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Beacon Balanced Fund (AADBX) and American Beacon Stephens Mid-Cap Growth Fund (STMGX). 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.

	AADBX	STMGX	Difference
Sharpe ratio: Return per unit of total volatility	2.15	1.41	+0.74
Sortino ratio: Return per unit of downside risk	3.16	2.02	+1.15
Omega ratio: Gain probability vs. loss probability	1.39	1.24	+0.15
Calmar ratio: Return relative to maximum drawdown	3.18	2.11	+1.07
Martin ratio: Return relative to average drawdown	11.07	7.45	+3.62
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AADBX vs. STMGX - Sharpe Ratio Comparison

The current AADBX Sharpe Ratio is 2.15, which is higher than the STMGX Sharpe Ratio of 1.41. The chart below compares the historical Sharpe Ratios of AADBX and STMGX, 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

	AADBX	STMGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.15	1.41	+0.74
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.58	0.35	+0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.71	0.67	+0.05
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	0.46	+0.19

Drawdowns

AADBX vs. STMGX - Drawdown Comparison

The maximum AADBX drawdown since its inception was -41.05%, smaller than the maximum STMGX drawdown of -57.58%. Use the drawdown chart below to compare losses from any high point for AADBX and STMGX.

Drawdown Indicators

	AADBX	STMGX	Difference
Max Drawdown Largest peak-to-trough decline	-41.05%	-57.58%	+16.53%
Max Drawdown (1Y) Largest decline over 1 year	-5.50%	-10.84%	+5.34%
Max Drawdown (3Y) Largest decline over 3 years	-12.70%	-22.50%	+9.80%
Max Drawdown (5Y) Largest decline over 5 years	-17.79%	-36.59%	+18.80%
Max Drawdown (10Y) Largest decline over 10 years	-28.13%	-36.59%	+8.46%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-4.75%	-10.16%	+5.41%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.58%	3.07%	-1.49%

Volatility

AADBX vs. STMGX - Volatility Comparison

The current volatility for American Beacon Balanced Fund (AADBX) is 2.02%, while American Beacon Stephens Mid-Cap Growth Fund (STMGX) has a volatility of 4.24%. This indicates that AADBX experiences smaller price fluctuations and is considered to be less risky than STMGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AADBX	STMGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.02%	4.24%	-2.22%
Volatility (6M) Calculated over the trailing 6-month period	5.91%	12.70%	-6.79%
Volatility (1Y) Calculated over the trailing 1-year period	8.13%	16.27%	-8.14%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	11.59%	20.83%	-9.24%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	12.43%	20.89%	-8.46%

AADBX vs. STMGX - Expense Ratio Comparison

AADBX has a 0.72% expense ratio, which is lower than STMGX's 1.14% expense ratio.

Dividends

AADBX vs. STMGX - Dividend Comparison

AADBX's dividend yield for the trailing twelve months is around 8.26%, less than STMGX's 30.79% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AADBX American Beacon Balanced Fund	8.26%	8.77%	9.66%	2.27%	10.60%	9.34%	13.14%	9.00%	9.67%	7.83%	1.87%	6.84%
STMGX American Beacon Stephens Mid-Cap Growth Fund	30.79%	34.38%	4.86%	0.00%	3.42%	7.49%	1.45%	3.60%	9.39%	5.40%	6.65%	5.62%

Frequently Asked Questions

Can I hold both AADBX and STMGX in my portfolio?

AADBX and STMGX have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AADBX or STMGX?

STMGX has higher volatility (4.24%) compared to AADBX (2.02%). In terms of maximum drawdown, AADBX dropped -41.05% vs STMGX's -57.58%.

Which has better risk-adjusted returns?

AADBX currently has the higher Sharpe Ratio (2.15 vs 1.41), 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.