DLBMX vs. MIEYX

Last updated Jun 4, 2026

DLBMX (MassMutual Small Cap Opportunities Fund) and MIEYX (MM S&P 500 Index Fund) are both mutual funds - DLBMX is a Small Cap Blend Equities fund managed by MassMutual, while MIEYX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, DLBMX returned 14.27%/yr vs 14.60%/yr for MIEYX. Their correlation of 0.82 suggests significant overlap in exposure. DLBMX charges 1.20%/yr vs 0.46%/yr for MIEYX.

Performance

DLBMX vs. MIEYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MassMutual Small Cap Opportunities Fund (DLBMX) and MM S&P 500 Index Fund (MIEYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, DLBMX achieves a 12.59% return, which is significantly higher than MIEYX's 11.45% return. Both investments have delivered pretty close results over the past 10 years, with DLBMX having a 14.27% annualized return and MIEYX not far ahead at 14.60%.

DLBMX

• 1D: 1.26%
• 1M: 3.06%
• YTD: 12.59%
• 6M: 10.73%
• 1Y: 22.34%
• 3Y*: 15.60%
• 5Y*: 13.59%
• 10Y*: 14.27%

MIEYX

• 1D: 0.13%
• 1M: 5.77%
• YTD: 11.45%
• 6M: 11.46%
• 1Y: 28.32%
• 3Y*: 22.16%
• 5Y*: 13.68%
• 10Y*: 14.60%

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

DLBMX vs. MIEYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
DLBMX MassMutual Small Cap Opportunities Fund	12.59%	8.07%	12.30%	17.43%	-16.19%	64.90%	19.75%	25.54%	-11.14%	13.90%
MIEYX MM S&P 500 Index Fund	11.45%	17.27%	24.36%	25.76%	-18.63%	28.02%	17.87%	30.98%	-5.26%	18.90%

Correlation

The correlation between DLBMX and MIEYX 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	0.82
Correlation (10Y) Calculated over the trailing 10-year period	0.81
Correlation (All Time) Calculated using the full available price history since Jul 14, 1998	0.82

The correlation between DLBMX and MIEYX has been stable across timeframes, ranging from 0.74 to 0.82 - a consistent structural relationship.

Return for Risk

DLBMX vs. MIEYX — Risk / Return Rank

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

DLBMX

DLBMX Risk / Return Rank: 26
DLBMX Sharpe Ratio Rank: 24
DLBMX Sortino Ratio Rank: 24
DLBMX Omega Ratio Rank: 23
DLBMX Calmar Ratio Rank: 27
DLBMX Martin Ratio Rank: 33

MIEYX

MIEYX Risk / Return Rank: 70
MIEYX Sharpe Ratio Rank: 72
MIEYX Sortino Ratio Rank: 64
MIEYX Omega Ratio Rank: 64
MIEYX Calmar Ratio Rank: 71
MIEYX Martin Ratio Rank: 81

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.

DLBMX vs. MIEYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MassMutual Small Cap Opportunities Fund (DLBMX) and MM S&P 500 Index Fund (MIEYX). 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.

	DLBMX	MIEYX	Difference
Sharpe ratio Return per unit of total volatility	1.40	2.46	-1.06
Sortino ratio Return per unit of downside risk	2.06	3.34	-1.29
Omega ratio Gain probability vs. loss probability	1.25	1.45	-0.20
Calmar ratio Return relative to maximum drawdown	1.95	3.28	-1.33
Martin ratio Return relative to average drawdown	7.49	15.26	-7.77
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

DLBMX vs. MIEYX - Sharpe Ratio Comparison

The current DLBMX Sharpe Ratio is 1.40, which is lower than the MIEYX Sharpe Ratio of 2.46. The chart below compares the historical Sharpe Ratios of DLBMX and MIEYX, 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

	DLBMX	MIEYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.40	2.46	-1.06
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.43	0.54	-0.11
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.51	0.65	-0.14
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.40	+0.03

Drawdowns

DLBMX vs. MIEYX - Drawdown Comparison

The maximum DLBMX drawdown since its inception was -65.12%, which is greater than MIEYX's maximum drawdown of -55.63%. Use the drawdown chart below to compare losses from any high point for DLBMX and MIEYX.

Drawdown Indicators

	DLBMX	MIEYX	Difference
Max Drawdown Largest peak-to-trough decline	-65.12%	-55.63%	-9.49%
Max Drawdown (1Y) Largest decline over 1 year	-12.42%	-8.92%	-3.50%
Max Drawdown (3Y) Largest decline over 3 years	-24.84%	-36.63%	+11.79%
Max Drawdown (5Y) Largest decline over 5 years	-29.39%	-36.63%	+7.24%
Max Drawdown (10Y) Largest decline over 10 years	-42.55%	-36.63%	-5.92%
Current Drawdown Current decline from peak	-0.43%	-2.43%	+2.00%
Average Drawdown Average peak-to-trough decline	-10.21%	-12.57%	+2.36%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.23%	1.91%	+1.32%

Volatility

DLBMX vs. MIEYX - Volatility Comparison

MassMutual Small Cap Opportunities Fund (DLBMX) has a higher volatility of 5.10% compared to MM S&P 500 Index Fund (MIEYX) at 2.84%. This indicates that DLBMX's price experiences larger fluctuations and is considered to be riskier than MIEYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	DLBMX	MIEYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.10%	2.84%	+2.26%
Volatility (6M) Calculated over the trailing 6-month period	12.77%	8.99%	+3.78%
Volatility (1Y) Calculated over the trailing 1-year period	17.29%	11.89%	+5.40%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	31.68%	25.50%	+6.18%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	28.18%	22.57%	+5.61%

DLBMX vs. MIEYX - Expense Ratio Comparison

DLBMX has a 1.20% expense ratio, which is higher than MIEYX's 0.46% expense ratio.

Dividends

DLBMX vs. MIEYX - Dividend Comparison

DLBMX's dividend yield for the trailing twelve months is around 8.98%, less than MIEYX's 15.82% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DLBMX MassMutual Small Cap Opportunities Fund	8.98%	10.11%	9.33%	4.73%	0.88%	35.42%	7.82%	0.46%	11.94%	13.55%	3.14%	11.15%
MIEYX MM S&P 500 Index Fund	15.82%	17.63%	32.89%	7.13%	33.24%	13.29%	16.29%	6.38%	19.14%	21.81%	4.19%	2.29%

Frequently Asked Questions

Can I hold both DLBMX and MIEYX in my portfolio?

DLBMX and MIEYX 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, DLBMX or MIEYX?

DLBMX has higher volatility (5.10%) compared to MIEYX (2.84%). In terms of maximum drawdown, DLBMX dropped -65.12% vs MIEYX's -55.63%.

Which has better risk-adjusted returns?

MIEYX currently has the higher Sharpe Ratio (2.46 vs 1.40), 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.