MMGEX vs. OBMCX

Last updated Apr 1, 2026

Compare and contrast key facts about MassMutual Small Cap Growth Equity Fund (MMGEX) and Oberweis Micro Cap Fund (OBMCX).

MMGEX is managed by MassMutual. It was launched on May 3, 1999. OBMCX is managed by Oberweis. It was launched on Dec 29, 1995.

Performance

MMGEX vs. OBMCX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MassMutual Small Cap Growth Equity Fund (MMGEX) and Oberweis Micro Cap Fund (OBMCX). The values are adjusted to include any dividend payments, if applicable.

MMGEX vs. OBMCX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MMGEX MassMutual Small Cap Growth Equity Fund	-1.89%	10.66%	14.79%	16.35%	-26.21%	8.52%	40.08%	61.40%	-5.46%	24.28%
OBMCX Oberweis Micro Cap Fund	8.96%	14.70%	22.82%	18.87%	-10.57%	53.20%	29.91%	21.94%	-12.04%	27.90%

Returns By Period

In the year-to-date period, MMGEX achieves a -1.89% return, which is significantly lower than OBMCX's 8.96% return. Over the past 10 years, MMGEX has underperformed OBMCX with an annualized return of 13.31%, while OBMCX has yielded a comparatively higher 18.72% annualized return.

MMGEX

• 1D: -2.15%
• 1M: -9.01%
• YTD: -1.89%
• 6M: 2.33%
• 1Y: 20.94%
• 3Y*: 11.61%
• 5Y*: 2.17%
• 10Y*: 13.31%

OBMCX

• 1D: -3.56%
• 1M: -5.54%
• YTD: 8.96%
• 6M: 7.64%
• 1Y: 43.65%
• 3Y*: 18.71%
• 5Y*: 14.63%
• 10Y*: 18.72%

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

MMGEX vs. OBMCX - Expense Ratio Comparison

MMGEX has a 1.41% expense ratio, which is lower than OBMCX's 1.48% expense ratio.

OBMCX

Oberweis Micro Cap Fund

MMGEX

MassMutual Small Cap Growth Equity Fund

Return for Risk

MMGEX vs. OBMCX — Risk / Return Rank

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

MMGEX

MMGEX Risk / Return Rank: 47
MMGEX Sharpe Ratio Rank: 41
MMGEX Sortino Ratio Rank: 44
MMGEX Omega Ratio Rank: 38
MMGEX Calmar Ratio Rank: 54
MMGEX Martin Ratio Rank: 59

OBMCX

OBMCX Risk / Return Rank: 86
OBMCX Sharpe Ratio Rank: 84
OBMCX Sortino Ratio Rank: 84
OBMCX Omega Ratio Rank: 77
OBMCX Calmar Ratio Rank: 94
OBMCX Martin Ratio Rank: 92

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.

MMGEX vs. OBMCX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MassMutual Small Cap Growth Equity Fund (MMGEX) and Oberweis Micro Cap Fund (OBMCX). 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.

	MMGEX	OBMCX	Difference
Sharpe ratio Return per unit of total volatility	0.88	1.57	-0.70
Sortino ratio Return per unit of downside risk	1.35	2.15	-0.80
Omega ratio Gain probability vs. loss probability	1.18	1.29	-0.11
Calmar ratio Return relative to maximum drawdown	1.31	3.08	-1.77
Martin ratio Return relative to average drawdown	5.65	11.08	-5.44
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MMGEX vs. OBMCX - Sharpe Ratio Comparison

The current MMGEX Sharpe Ratio is 0.88, which is lower than the OBMCX Sharpe Ratio of 1.57. The chart below compares the historical Sharpe Ratios of MMGEX and OBMCX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	MMGEX	OBMCX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.88	1.57	-0.70
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.07	0.56	-0.50
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.46	0.73	-0.27
Sharpe Ratio (All Time) Calculated using the full available price history	0.29	0.41	-0.12

Correlation

The correlation between MMGEX and OBMCX is 0.86, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

MMGEX vs. OBMCX - Dividend Comparison

MMGEX's dividend yield for the trailing twelve months is around 38.67%, more than OBMCX's 1.29% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MMGEX MassMutual Small Cap Growth Equity Fund	38.67%	37.94%	8.94%	0.00%	0.00%	44.40%	10.36%	32.83%	29.40%	6.91%	0.00%	33.83%
OBMCX Oberweis Micro Cap Fund	1.29%	1.41%	2.53%	0.00%	1.37%	24.35%	0.00%	0.00%	19.67%	11.76%	0.05%	3.07%

Drawdowns

MMGEX vs. OBMCX - Drawdown Comparison

The maximum MMGEX drawdown since its inception was -63.65%, smaller than the maximum OBMCX drawdown of -68.24%. Use the drawdown chart below to compare losses from any high point for MMGEX and OBMCX.

Drawdown Indicators

	MMGEX	OBMCX	Difference
Max Drawdown Largest peak-to-trough decline	-63.65%	-68.24%	+4.59%
Max Drawdown (1Y) Largest decline over 1 year	-13.78%	-12.68%	-1.10%
Max Drawdown (5Y) Largest decline over 5 years	-51.21%	-28.11%	-23.10%
Max Drawdown (10Y) Largest decline over 10 years	-51.21%	-50.04%	-1.17%
Current Drawdown Current decline from peak	-23.06%	-8.84%	-14.22%
Average Drawdown Average peak-to-trough decline	-23.52%	-16.51%	-7.01%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.20%	3.53%	-0.33%

Volatility

MMGEX vs. OBMCX - Volatility Comparison

The current volatility for MassMutual Small Cap Growth Equity Fund (MMGEX) is 8.49%, while Oberweis Micro Cap Fund (OBMCX) has a volatility of 11.54%. This indicates that MMGEX experiences smaller price fluctuations and is considered to be less risky than OBMCX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MMGEX	OBMCX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.49%	11.54%	-3.05%
Volatility (6M) Calculated over the trailing 6-month period	14.88%	18.92%	-4.04%
Volatility (1Y) Calculated over the trailing 1-year period	23.38%	27.25%	-3.87%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	32.35%	26.10%	+6.25%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	28.90%	25.70%	+3.20%