MOSAX vs. MPSAX

Last updated Jun 24, 2026

MOSAX (MassMutual Overseas Fund) and MPSAX (MassMutual Inflation-Protected and Income Fund) are both mutual funds - MOSAX is a Foreign Large Cap Equities fund managed by MassMutual, while MPSAX is a Inflation-Protected Bonds fund managed by MassMutual. Over the past 10 years, MOSAX returned 8.99%/yr vs 3.28%/yr for MPSAX. At a correlation of -0.05, they often move in opposite directions. MOSAX charges 1.34%/yr vs 1.02%/yr for MPSAX.

Performance

MOSAX vs. MPSAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MassMutual Overseas Fund (MOSAX) and MassMutual Inflation-Protected and Income Fund (MPSAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MOSAX achieves a 1.99% return, which is significantly higher than MPSAX's 0.49% return. Over the past 10 years, MOSAX has outperformed MPSAX with an annualized return of 8.99%, while MPSAX has yielded a comparatively lower 3.28% annualized return.

MOSAX

• 1D: -0.34%
• 1M: 0.58%
• YTD: 1.99%
• 6M: 1.75%
• 1Y: 11.29%
• 3Y*: 10.31%
• 5Y*: 5.53%
• 10Y*: 8.99%

MPSAX

• 1D: -0.33%
• 1M: -0.01%
• YTD: 0.49%
• 6M: 0.88%
• 1Y: 2.33%
• 3Y*: 2.74%
• 5Y*: 2.58%
• 10Y*: 3.28%

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

MOSAX vs. MPSAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MOSAX MassMutual Overseas Fund	1.99%	25.48%	0.12%	18.26%	-15.35%	12.61%	8.51%	28.26%	-16.78%	26.44%
MPSAX MassMutual Inflation-Protected and Income Fund	0.49%	5.50%	-0.02%	4.93%	-13.72%	20.31%	10.79%	7.67%	-1.86%	2.86%

Correlation

The correlation between MOSAX and MPSAX 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	0.29
Correlation (5Y) Calculated over the trailing 5-year period	0.21
Correlation (10Y) Calculated over the trailing 10-year period	0.10
Correlation (All Time) Calculated using the full available price history since Dec 31, 2003	-0.05

The correlation between MOSAX and MPSAX shifts across timeframes, from -0.05 (all time) to 0.30 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

MOSAX vs. MPSAX — Risk / Return Rank

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

MOSAX

MOSAX Risk / Return Rank: 12
MOSAX Sharpe Ratio Rank: 11
MOSAX Sortino Ratio Rank: 12
MOSAX Omega Ratio Rank: 11
MOSAX Calmar Ratio Rank: 12
MOSAX Martin Ratio Rank: 13

MPSAX

MPSAX Risk / Return Rank: 10
MPSAX Sharpe Ratio Rank: 9
MPSAX Sortino Ratio Rank: 9
MPSAX Omega Ratio Rank: 9
MPSAX Calmar Ratio Rank: 14
MPSAX Martin Ratio Rank: 11

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.

MOSAX vs. MPSAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MassMutual Overseas Fund (MOSAX) and MassMutual Inflation-Protected and Income Fund (MPSAX). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	MOSAX	MPSAX	Difference
Sharpe ratio: Return per unit of total volatility	0.85	0.71	+0.14
Sortino ratio: Return per unit of downside risk	1.28	1.07	+0.22
Omega ratio: Gain probability vs. loss probability	1.16	1.13	+0.03
Calmar ratio: Return relative to maximum drawdown	1.03	1.20	-0.17
Martin ratio: Return relative to average drawdown	3.48	2.84	+0.64

MOSAX vs. MPSAX - Sharpe Ratio Comparison

The current MOSAX Sharpe Ratio is 0.85, which is comparable to the MPSAX Sharpe Ratio of 0.71. The chart below compares the historical Sharpe Ratios of MOSAX and MPSAX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MOSAX vs. MPSAX - Drawdown Comparison

The maximum MOSAX drawdown since its inception was -58.43%, which is greater than MPSAX's maximum drawdown of -19.35%. Use the drawdown chart below to compare losses from any high point for MOSAX and MPSAX.

Drawdown Indicators

	MOSAX	MPSAX	Difference
Max Drawdown Largest peak-to-trough decline	-58.43%	-19.35%	-39.08%
Max Drawdown (1Y) Largest decline over 1 year	-11.74%	-2.04%	-9.70%
Max Drawdown (3Y) Largest decline over 3 years	-14.43%	-4.01%	-10.42%
Max Drawdown (5Y) Largest decline over 5 years	-33.69%	-19.35%	-14.34%
Max Drawdown (10Y) Largest decline over 10 years	-36.75%	-19.35%	-17.40%
Current Drawdown Current decline from peak	-2.46%	-8.95%	+6.49%
Average Drawdown Average peak-to-trough decline	-11.60%	-6.19%	-5.41%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.46%	0.86%	+2.60%

Volatility

MOSAX vs. MPSAX - Volatility Comparison

MassMutual Overseas Fund (MOSAX) has a higher volatility of 3.83% compared to MassMutual Inflation-Protected and Income Fund (MPSAX) at 1.21%. This indicates that MOSAX's price experiences larger fluctuations and is considered to be riskier than MPSAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MOSAX	MPSAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.83%	1.21%	+2.62%
Volatility (6M) Calculated over the trailing 6-month period	11.32%	2.47%	+8.85%
Volatility (1Y) Calculated over the trailing 1-year period	14.17%	3.44%	+10.73%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.71%	11.76%	+5.95%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.17%	8.97%	+9.20%

MOSAX vs. MPSAX - Expense Ratio Comparison

MOSAX has a 1.34% expense ratio, which is higher than MPSAX's 1.02% expense ratio.

Dividends

MOSAX vs. MPSAX - Dividend Comparison

MOSAX's dividend yield for the trailing twelve months is around 17.85%, more than MPSAX's 3.44% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MOSAX MassMutual Overseas Fund	17.85%	18.21%	6.02%	2.24%	9.26%	9.64%	1.78%	5.10%	12.16%	1.42%	1.71%	3.12%
MPSAX MassMutual Inflation-Protected and Income Fund	3.44%	3.51%	1.44%	2.47%	3.34%	18.54%	5.13%	1.59%	2.68%	2.34%	2.23%	0.61%

Frequently Asked Questions

Can I hold both MOSAX and MPSAX in my portfolio?

MOSAX and MPSAX 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.

Which is riskier, MOSAX or MPSAX?

MOSAX has higher volatility (3.83%) compared to MPSAX (1.21%). In terms of maximum drawdown, MOSAX dropped -58.43% vs MPSAX's -19.35%.

Which has better risk-adjusted returns?

MOSAX currently has the higher Sharpe Ratio (0.85 vs 0.71), 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.