Fund Evaluator:

MFS Aggressive Growth Allocation B Overview

MFS Aggressive Growth Allocation B (MBAGX) is an actively managed Allocation Global Aggressive Allocation fund. MFS launched the fund in 2002.

The investment seeks a high level of total return consistent with an aggressive level of risk relative to the other MFS Asset Allocation Funds. The fund is designed to provide diversification among different asset classes by investing its assets in other mutual funds advised by the adviser referred to as underlying funds. Within the equity fund allocations, the adviser seeks to diversify by geography (by including domestic and international underlying funds), in terms of market capitalization (by including large, mid, and small capitalization underlying funds), and by style (by including both growth and value underlying funds).

About MFS Aggressive Growth Allocation B (MBAGX)

There are 3 members of the management team with an average tenure of 4.59 years: Ben Nastou (2023), Natalie Shapiro (2018), Erich Shigley (2023). Management tenure is more important for actively managed funds than passive index funds.

The fund has 5 primary benchmarks: S&P 500 (TR) (1970) index with a weighting of 100%, FTSE EPRA Nareit Developed NR USD index with a weighting of 5%, MSCI EAFE NR USD index with a weighting of 30%, S&P 500 (TR) (1970) index with a weighting of 60% and Bloomberg Commodity TR USD index with a weighting of 5%. MFS Aggressive Growth Allocation B has 16 securities in its portfolio. The top 10 holdings constitute 82.2% of the fund’s assets. The fund meets the SEC requirement of being classified as a diversified fund. The fund is not considered to have an ESG focus with its investment selection and management.

MFS Aggressive Growth Allocation B is part of the Allocation global asset class and is within the Allocation fund group. MFS Aggressive Growth Allocation B has 32.3% of its portfolio invested in foreign issues. The overall assets allocated to domestic stock is 61.6%. There is 31.6% allocated to foreign stock, and 0.1% is allocated to preferred stocks. The bond allocation as a percentage of total assets is 3.7% (3.0% domestic bond, 0.7% foreign bond and 0.0% convertible bond). MFS Aggressive Growth Allocation B has -1.7% of the portfolio in cash.

Assets Under Management

The fund has $4 million in total assets, which is below the $328 million average for the Global Aggressive Allocation category. Normally, lower assets under management translates to higher average expense ratios, and greater total assets are desired. However, for some investment categories, such as small-cap investing, it may be difficult for the manager to fully employ the desired active strategy if assets grow too large or too quickly.

MBAGX Performance and Fees

The expense ratio measures how much of a fund’s assets are used for administrative expenses and operating expenses, including adviser fees and fees for the transfer agent and custodial services. The MFS Aggressive Growth Allocation B expense ratio is high compared to funds in the Global Aggressive Allocation category. MFS Aggressive Growth Allocation B has an expense ratio of 1.75%, which is 71% higher than its category average, making the fund expense ratio grade a F. While it is difficult to predict returns, it is known that high annual expense ratios reduce your rate of return, and excessive fees are difficult to overcome. Active management normally comes with higher expense ratios than passive index management. Certain investment categories such as small company and foreign also normally have higher expense ratios. It is best to compare fund expense ratios against the category averages for meaningful assessments.

High portfolio turnover can translate to higher expenses and lower aftertax returns. MFS Aggressive Growth Allocation B has a portfolio turnover rate of 1%, indicating that holds its assets around 1.0 years. By way of comparison, the average portfolio turnover is 30% for the Global Aggressive Allocation category.

Recently, in the month of July 2026, MFS Aggressive Growth Allocation B returned 0.8%, which earned it a grade of A, as the Global Aggressive Allocation category had an average return of -0.9%. The letter grades of A, B, C, D and F are based upon relative rankings within the investment category. A grade of A, for example, would indicate that the return is in the highest 20% for that time period compared to all funds in that category.

MFS Aggressive Growth Allocation B has a trailing yield of 0.62%, which is below the 1.37% category average. The fund normally distributes its income annually and its capital gains annually.

It’s natural to seek the best-performing investments, but you must consider the relationship between risk and return and the impact of costs and taxes on your realized returns.

MFS Aggressive Growth Allocation B Grades

Year to date, the fund has returned 9.0%, 1.5 percentage points worse than the category, which translates into a grade of F. The fund has returned 14.2% over the past year (grade of F), 12.3% over the past three years (grade of F) and 6.3% per year over the past five years (grade of F) and 9.8% per year over the past 10 years (grade of F).

For more mutual fund grades, analysis and screening tools to help your investment discovery, join AAII for a $2, full-access trial. Learn more here: https://invest.aaii.com/membership.

Otherwise, for more information about MFS Aggressive Growth Allocation B, including its riskiness, submit your email to unlock the rest of the article.