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MOSAX vs. FAOSX
Performance
Return for Risk
Drawdowns
Volatility
Dividends

MOSAX vs. FAOSX

Last updated Jun 24, 2026

MOSAX (MassMutual Overseas Fund) and FAOSX (Fidelity Advisor Overseas Fund Class Z) are both Foreign Large Cap Equities funds. Over the past 5 years, MOSAX returned 5.53%/yr vs 3.89%/yr for FAOSX. Their correlation of 0.89 suggests significant overlap in exposure. MOSAX charges 1.34%/yr vs 1.02%/yr for FAOSX.

Performance

MOSAX vs. FAOSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MassMutual Overseas Fund (MOSAX) and Fidelity Advisor Overseas Fund Class Z (FAOSX). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

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%

FAOSX

1D
0.00%
1M
0.00%
YTD
0.00%
6M
0.00%
1Y
-0.55%
3Y*
8.01%
5Y*
3.89%
10Y*
—
*Multi-year figures are annualized to reflect compound growth (CAGR)

MOSAX vs. FAOSX - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
MOSAX
MassMutual Overseas Fund		1.99%25.48%0.12%18.26%-15.35%12.61%8.51%28.26%-16.78%21.86%
FAOSX
Fidelity Advisor Overseas Fund Class Z		0.00%15.36%5.06%20.52%-24.31%19.42%15.17%27.96%-14.73%26.25%

Correlation

The correlation between MOSAX and FAOSX is 0.54, 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

0.54

Correlation (3Y)
Calculated over the trailing 3-year period

0.80

Correlation (5Y)
Calculated over the trailing 5-year period

0.87

Correlation (All Time)
Calculated using the full available price history since Feb 1, 2017

0.89

Over the past year, the correlation between MOSAX and FAOSX has dropped to 0.54 - well below their long-term average of 0.89, suggesting their price drivers have been diverging.

Compare stocks, funds, or ETFs

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MassMutual Overseas Fund

Fidelity Advisor Overseas Fund Class Z

Often compared with MOSAX:
MOSAX vs. MSTDXMOSAX vs. DLHYXMOSAX vs. DLBMXMOSAX vs. MDDAXMOSAX vs. MCBDXMOSAX vs. MGFAXMOSAX vs. MEFAX
Often compared with FAOSX:
FAOSX vs. FAOIXFAOSX vs. FAERXFAOSX vs. HISIXFAOSX vs. BIGFXFAOSX vs. JOHIXFAOSX vs. BCIIXFAOSX vs. GSIMX

Return for Risk

MOSAX vs. FAOSX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
MOSAX
MOSAX Risk / Return Rank: 1212
Overall Rank
MOSAX Sharpe Ratio Rank: 1111
Sharpe Ratio Rank
MOSAX Sortino Ratio Rank: 1212
Sortino Ratio Rank
MOSAX Omega Ratio Rank: 1111
Omega Ratio Rank
MOSAX Calmar Ratio Rank: 1212
Calmar Ratio Rank
MOSAX Martin Ratio Rank: 1313
Martin Ratio Rank
FAOSX
FAOSX Risk / Return Rank: 33
Overall Rank
FAOSX Sharpe Ratio Rank: 33
Sharpe Ratio Rank
FAOSX Sortino Ratio Rank: 22
Sortino Ratio Rank
FAOSX Omega Ratio Rank: 22
Omega Ratio Rank
FAOSX Calmar Ratio Rank: 33
Calmar Ratio Rank
FAOSX Martin Ratio Rank: 33
Martin Ratio Rank
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. FAOSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MassMutual Overseas Fund (MOSAX) and Fidelity Advisor Overseas Fund Class Z (FAOSX). 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.

MOSAXFAOSXDifference
Sharpe ratioReturn per unit of total volatility
0.85
-0.05

+0.90

Sortino ratioReturn per unit of downside risk
1.28
-0.01

+1.29

Omega ratioGain probability vs. loss probability

1.16

1.00

+0.16

Calmar ratioReturn relative to maximum drawdown

1.03

-0.06

+1.09

Martin ratioReturn relative to average drawdown

3.48

-0.09

+3.58

MOSAX vs. FAOSX - Sharpe Ratio Comparison

The current MOSAX Sharpe Ratio is 0.85, which is higher than the FAOSX Sharpe Ratio of -0.05. The chart below compares the historical Sharpe Ratios of MOSAX and FAOSX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Drawdowns

MOSAX vs. FAOSX - Drawdown Comparison

The maximum MOSAX drawdown since its inception was -58.43%, which is greater than FAOSX's maximum drawdown of -36.24%. Use the drawdown chart below to compare losses from any high point for MOSAX and FAOSX.

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Drawdown Indicators

MOSAXFAOSXDifference

Max Drawdown

Largest peak-to-trough decline

-58.43%

-36.24%

-22.19%

Max Drawdown (1Y)

Largest decline over 1 year

-11.74%

-7.26%

-4.48%

Max Drawdown (3Y)

Largest decline over 3 years

-14.43%

-13.96%

-0.47%

Max Drawdown (5Y)

Largest decline over 5 years

-33.69%

-36.24%

+2.55%

Max Drawdown (10Y)

Largest decline over 10 years

-36.75%

—

—

Current Drawdown

Current decline from peak

-2.46%

-5.86%

+3.40%

Average Drawdown

Average peak-to-trough decline

-11.60%

-7.92%

-3.68%

Ulcer Index

Depth and duration of drawdowns from previous peaks

3.46%

4.13%

-0.67%

Volatility

MOSAX vs. FAOSX - Volatility Comparison

MassMutual Overseas Fund (MOSAX) has a higher volatility of 3.83% compared to Fidelity Advisor Overseas Fund Class Z (FAOSX) at 0.00%. This indicates that MOSAX's price experiences larger fluctuations and is considered to be riskier than FAOSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

MOSAXFAOSXDifference

Volatility (1M)

Calculated over the trailing 1-month period

3.83%

0.00%

+3.83%

Volatility (6M)

Calculated over the trailing 6-month period

11.32%

3.63%

+7.69%

Volatility (1Y)

Calculated over the trailing 1-year period

14.17%

8.76%

+5.41%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

17.71%

16.70%

+1.01%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

18.17%

16.64%

+1.53%

MOSAX vs. FAOSX - Expense Ratio Comparison

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

Dividends

MOSAX vs. FAOSX - Dividend Comparison

MOSAX's dividend yield for the trailing twelve months is around 17.85%, more than FAOSX's 8.67% yield.

PositionTTM20252024202320222021202020192018201720162015
FAOSX
Fidelity Advisor Overseas Fund Class Z		8.67%8.67%1.80%1.12%0.85%2.07%0.00%1.70%5.30%3.93%0.00%0.00%
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%

Frequently Asked Questions

MOSAX and FAOSX have a correlation of 0.54, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

MOSAX has higher volatility (3.83%) compared to FAOSX (0.00%). In terms of maximum drawdown, MOSAX dropped -58.43% vs FAOSX's -36.24%.

MOSAX currently has the higher Sharpe Ratio (0.85 vs -0.05), 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.

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