MMIUX vs. PREIX

Last updated Jun 4, 2026

MMIUX (MassMutual Select T. Rowe Price International Equity Fund) and PREIX (T. Rowe Price Equity Index 500 Fund) are both mutual funds - MMIUX is a Foreign Large Cap Equities fund managed by T. Rowe Price, while PREIX is a Large Cap Blend Equities fund managed by T. Rowe Price. A 0.74 correlation means they provide meaningful diversification when combined. MMIUX charges 0.00%/yr vs 0.15%/yr for PREIX.

Performance

MMIUX vs. PREIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MassMutual Select T. Rowe Price International Equity Fund (MMIUX) and T. Rowe Price Equity Index 500 Fund (PREIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

MMIUX

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

PREIX

• 1D: 0.13%
• 1M: 5.78%
• YTD: 11.61%
• 6M: 11.63%
• 1Y: 28.74%
• 3Y*: 22.53%
• 5Y*: 14.08%
• 10Y*: 15.42%

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

MMIUX vs. PREIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
MMIUX MassMutual Select T. Rowe Price International Equity Fund	0.00%	21.71%	5.02%	15.96%	-13.89%	6.55%	10.17%	13.51%
PREIX T. Rowe Price Equity Index 500 Fund	11.61%	17.66%	24.78%	26.07%	-18.27%	28.48%	18.17%	18.04%

Correlation

The correlation between MMIUX and PREIX is 0.30, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.30
Correlation (3Y) Calculated over the trailing 3-year period	0.61
Correlation (5Y) Calculated over the trailing 5-year period	0.70
Correlation (All Time) Calculated using the full available price history since Feb 21, 2019	0.74

Over the past year, the correlation between MMIUX and PREIX has dropped to 0.30 - well below their long-term average of 0.74, suggesting their price drivers have been diverging.

Return for Risk

MMIUX vs. PREIX — Risk / Return Rank

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

PREIX

PREIX Risk / Return Rank: 72
PREIX Sharpe Ratio Rank: 74
PREIX Sortino Ratio Rank: 66
PREIX Omega Ratio Rank: 66
PREIX Calmar Ratio Rank: 73
PREIX Martin Ratio Rank: 82

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.

MMIUX vs. PREIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MassMutual Select T. Rowe Price International Equity Fund (MMIUX) and T. Rowe Price Equity Index 500 Fund (PREIX). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	MMIUX	PREIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	2.50	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.83	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.85	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	0.61	—

Drawdowns

Drawdown Indicators

	MMIUX	PREIX	Difference
Max Drawdown Largest peak-to-trough decline	—	-55.32%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-8.93%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-18.78%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-24.60%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-33.81%	—
Current Drawdown Current decline from peak	—	0.00%	—
Average Drawdown Average peak-to-trough decline	—	-8.73%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.91%	—

Volatility

Volatility by Period

	MMIUX	PREIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	2.83%	—
Volatility (6M) Calculated over the trailing 6-month period	—	8.98%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	11.87%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	17.00%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	18.11%	—

MMIUX vs. PREIX - Expense Ratio Comparison

MMIUX has a 0.00% expense ratio, which is lower than PREIX's 0.15% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

MMIUX vs. PREIX - Dividend Comparison

MMIUX has not paid dividends to shareholders, while PREIX's dividend yield for the trailing twelve months is around 2.10%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MMIUX MassMutual Select T. Rowe Price International Equity Fund	0.00%	0.00%	9.06%	2.86%	3.03%	4.22%	1.56%	2.23%	0.00%	0.00%	0.00%	0.00%
PREIX T. Rowe Price Equity Index 500 Fund	2.10%	2.32%	1.17%	1.32%	1.50%	1.56%	1.97%	2.13%	2.60%	1.30%	2.03%	2.02%

Frequently Asked Questions

Can I hold both MMIUX and PREIX in my portfolio?

MMIUX and PREIX have a correlation of 0.30, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.