MIAGX vs. BWBIX

Last updated Jun 5, 2026

MIAGX (MFS Aggressive Growth Allocation Fund) and BWBIX (Baron WealthBuilder Fund) are both Diversified Portfolio funds. Over the past 5 years, MIAGX returned 7.50%/yr vs 4.11%/yr for BWBIX. Their correlation of 0.89 suggests significant overlap in exposure. MIAGX charges 0.13%/yr vs 0.05%/yr for BWBIX.

Performance

MIAGX vs. BWBIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Aggressive Growth Allocation Fund (MIAGX) and Baron WealthBuilder Fund (BWBIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MIAGX achieves a 7.55% return, which is significantly higher than BWBIX's -0.41% return.

MIAGX

• 1D: -0.65%
• 1M: 1.72%
• YTD: 7.55%
• 6M: 7.87%
• 1Y: 16.49%
• 3Y*: 14.86%
• 5Y*: 7.50%
• 10Y*: 11.03%

BWBIX

• 1D: -1.14%
• 1M: 2.47%
• YTD: -0.41%
• 6M: 4.74%
• 1Y: 9.88%
• 3Y*: 13.50%
• 5Y*: 4.11%
• 10Y*: —

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

MIAGX vs. BWBIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
MIAGX MFS Aggressive Growth Allocation Fund	7.55%	15.20%	12.11%	16.29%	-16.94%	19.16%	15.81%	29.98%	-9.79%
BWBIX Baron WealthBuilder Fund	-0.41%	10.23%	19.62%	25.77%	-32.58%	14.76%	62.85%	36.41%	-12.02%

Correlation

The correlation between MIAGX and BWBIX is 0.83, 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	0.83
Correlation (3Y) Calculated over the trailing 3-year period	0.89
Correlation (5Y) Calculated over the trailing 5-year period	0.89
Correlation (All Time) Calculated using the full available price history since May 22, 2018	0.89

The correlation between MIAGX and BWBIX has been stable across timeframes, ranging from 0.83 to 0.89 - a consistent structural relationship.

Return for Risk

MIAGX vs. BWBIX — Risk / Return Rank

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

MIAGX

MIAGX Risk / Return Rank: 31
MIAGX Sharpe Ratio Rank: 31
MIAGX Sortino Ratio Rank: 30
MIAGX Omega Ratio Rank: 31
MIAGX Calmar Ratio Rank: 28
MIAGX Martin Ratio Rank: 38

BWBIX

BWBIX Risk / Return Rank: 10
BWBIX Sharpe Ratio Rank: 9
BWBIX Sortino Ratio Rank: 10
BWBIX Omega Ratio Rank: 9
BWBIX Calmar Ratio Rank: 10
BWBIX 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.

MIAGX vs. BWBIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Aggressive Growth Allocation Fund (MIAGX) and Baron WealthBuilder Fund (BWBIX). 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.

	MIAGX	BWBIX	Difference
Sharpe ratio: Return per unit of total volatility	1.57	0.72	+0.85
Sortino ratio: Return per unit of downside risk	2.26	1.18	+1.08
Omega ratio: Gain probability vs. loss probability	1.29	1.14	+0.15
Calmar ratio: Return relative to maximum drawdown	1.96	0.89	+1.07
Martin ratio: Return relative to average drawdown	8.21	2.94	+5.28
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MIAGX vs. BWBIX - Sharpe Ratio Comparison

The current MIAGX Sharpe Ratio is 1.57, which is higher than the BWBIX Sharpe Ratio of 0.72. The chart below compares the historical Sharpe Ratios of MIAGX and BWBIX, 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

	MIAGX	BWBIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.57	0.72	+0.85
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.52	0.20	+0.32
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.72	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.52	0.52	-0.01

Drawdowns

MIAGX vs. BWBIX - Drawdown Comparison

The maximum MIAGX drawdown since its inception was -55.00%, which is greater than BWBIX's maximum drawdown of -39.14%. Use the drawdown chart below to compare losses from any high point for MIAGX and BWBIX.

Drawdown Indicators

	MIAGX	BWBIX	Difference
Max Drawdown Largest peak-to-trough decline	-55.00%	-39.14%	-15.86%
Max Drawdown (1Y) Largest decline over 1 year	-8.65%	-11.65%	+3.00%
Max Drawdown (3Y) Largest decline over 3 years	-14.88%	-21.59%	+6.71%
Max Drawdown (5Y) Largest decline over 5 years	-25.51%	-39.14%	+13.63%
Max Drawdown (10Y) Largest decline over 10 years	-32.78%	—	—
Current Drawdown Current decline from peak	-0.65%	-2.39%	+1.74%
Average Drawdown Average peak-to-trough decline	-6.81%	-11.72%	+4.91%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.06%	3.53%	-1.47%

Volatility

MIAGX vs. BWBIX - Volatility Comparison

The current volatility for MFS Aggressive Growth Allocation Fund (MIAGX) is 2.87%, while Baron WealthBuilder Fund (BWBIX) has a volatility of 3.59%. This indicates that MIAGX experiences smaller price fluctuations and is considered to be less risky than BWBIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MIAGX	BWBIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.87%	3.59%	-0.72%
Volatility (6M) Calculated over the trailing 6-month period	8.39%	11.02%	-2.63%
Volatility (1Y) Calculated over the trailing 1-year period	10.75%	14.41%	-3.66%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.48%	21.08%	-6.60%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.46%	23.14%	-7.68%

MIAGX vs. BWBIX - Expense Ratio Comparison

MIAGX has a 0.13% expense ratio, which is higher than BWBIX's 0.05% 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

MIAGX vs. BWBIX - Dividend Comparison

MIAGX's dividend yield for the trailing twelve months is around 7.27%, less than BWBIX's 7.64% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BWBIX Baron WealthBuilder Fund	7.64%	7.61%	0.77%	0.06%	3.21%	3.75%	1.24%	3.51%	0.14%	0.00%	0.00%	0.00%
MIAGX MFS Aggressive Growth Allocation Fund	7.27%	7.82%	5.16%	3.41%	4.49%	6.84%	3.69%	4.80%	6.06%	4.25%	3.12%	5.45%

Frequently Asked Questions

Can I hold both MIAGX and BWBIX in my portfolio?

MIAGX and BWBIX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MIAGX or BWBIX?

BWBIX has higher volatility (3.59%) compared to MIAGX (2.87%). In terms of maximum drawdown, MIAGX dropped -55.00% vs BWBIX's -39.14%.

Which has better risk-adjusted returns?

MIAGX currently has the higher Sharpe Ratio (1.57 vs 0.72), 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.