MYIIX vs. FSOSX

Last updated Apr 1, 2026

Compare and contrast key facts about MainStay WMC International Research Equity Fund (MYIIX) and Fidelity Series Overseas Fund (FSOSX).

MYIIX is managed by New York Life. It was launched on Sep 28, 2007. FSOSX is managed by Fidelity. It was launched on Jun 21, 2019.

Performance

MYIIX vs. FSOSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MainStay WMC International Research Equity Fund (MYIIX) and Fidelity Series Overseas Fund (FSOSX). The values are adjusted to include any dividend payments, if applicable.

MYIIX vs. FSOSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
MYIIX MainStay WMC International Research Equity Fund	-0.87%	39.10%	7.56%	13.56%	-15.94%	10.65%	1.75%	5.09%
FSOSX Fidelity Series Overseas Fund	-5.69%	21.29%	5.87%	21.49%	-23.25%	19.59%	16.36%	7.78%

Returns By Period

In the year-to-date period, MYIIX achieves a -0.87% return, which is significantly higher than FSOSX's -5.69% return.

MYIIX

• 1D: 0.10%
• 1M: -11.08%
• YTD: -0.87%
• 6M: 5.98%
• 1Y: 29.46%
• 3Y*: 16.37%
• 5Y*: 8.52%
• 10Y*: 6.53%

FSOSX

• 1D: 0.36%
• 1M: -11.39%
• YTD: -5.69%
• 6M: -5.28%
• 1Y: 7.28%
• 3Y*: 10.01%
• 5Y*: 5.83%
• 10Y*: —

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

MYIIX vs. FSOSX - Expense Ratio Comparison

MYIIX has a 0.86% expense ratio, which is higher than FSOSX's 0.01% expense ratio.

MYIIX

MainStay WMC International Research Equity Fund

FSOSX

Fidelity Series Overseas Fund

Return for Risk

MYIIX vs. FSOSX — Risk / Return Rank

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

MYIIX

MYIIX Risk / Return Rank: 87
MYIIX Sharpe Ratio Rank: 90
MYIIX Sortino Ratio Rank: 87
MYIIX Omega Ratio Rank: 87
MYIIX Calmar Ratio Rank: 86
MYIIX Martin Ratio Rank: 86

FSOSX

FSOSX Risk / Return Rank: 14
FSOSX Sharpe Ratio Rank: 14
FSOSX Sortino Ratio Rank: 13
FSOSX Omega Ratio Rank: 13
FSOSX Calmar Ratio Rank: 15
FSOSX Martin Ratio Rank: 16

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.

MYIIX vs. FSOSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MainStay WMC International Research Equity Fund (MYIIX) and Fidelity Series Overseas Fund (FSOSX). 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.

	MYIIX	FSOSX	Difference
Sharpe ratio Return per unit of total volatility	1.86	0.34	+1.53
Sortino ratio Return per unit of downside risk	2.35	0.58	+1.76
Omega ratio Gain probability vs. loss probability	1.37	1.08	+0.29
Calmar ratio Return relative to maximum drawdown	2.18	0.40	+1.78
Martin ratio Return relative to average drawdown	9.00	1.51	+7.49
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MYIIX vs. FSOSX - Sharpe Ratio Comparison

The current MYIIX Sharpe Ratio is 1.86, which is higher than the FSOSX Sharpe Ratio of 0.34. The chart below compares the historical Sharpe Ratios of MYIIX and FSOSX, 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

	MYIIX	FSOSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.86	0.34	+1.53
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.57	0.34	+0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.41	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.16	0.43	-0.27

Correlation

The correlation between MYIIX and FSOSX 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

MYIIX vs. FSOSX - Dividend Comparison

MYIIX's dividend yield for the trailing twelve months is around 2.95%, less than FSOSX's 9.70% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MYIIX MainStay WMC International Research Equity Fund	2.95%	2.92%	1.88%	2.05%	1.98%	2.74%	2.13%	10.18%	6.35%	1.76%	3.16%	0.90%
FSOSX Fidelity Series Overseas Fund	9.70%	9.15%	2.25%	1.63%	1.80%	2.92%	1.12%	0.37%	0.00%	0.00%	0.00%	0.00%

Drawdowns

MYIIX vs. FSOSX - Drawdown Comparison

The maximum MYIIX drawdown since its inception was -62.79%, which is greater than FSOSX's maximum drawdown of -35.36%. Use the drawdown chart below to compare losses from any high point for MYIIX and FSOSX.

Drawdown Indicators

	MYIIX	FSOSX	Difference
Max Drawdown Largest peak-to-trough decline	-62.79%	-35.36%	-27.43%
Max Drawdown (1Y) Largest decline over 1 year	-11.17%	-12.39%	+1.22%
Max Drawdown (5Y) Largest decline over 5 years	-30.71%	-35.36%	+4.65%
Max Drawdown (10Y) Largest decline over 10 years	-44.88%	—	—
Current Drawdown Current decline from peak	-11.08%	-11.89%	+0.81%
Average Drawdown Average peak-to-trough decline	-17.33%	-7.90%	-9.43%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.00%	3.31%	-0.31%

Volatility

MYIIX vs. FSOSX - Volatility Comparison

The current volatility for MainStay WMC International Research Equity Fund (MYIIX) is 6.13%, while Fidelity Series Overseas Fund (FSOSX) has a volatility of 8.28%. This indicates that MYIIX experiences smaller price fluctuations and is considered to be less risky than FSOSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MYIIX	FSOSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.13%	8.28%	-2.15%
Volatility (6M) Calculated over the trailing 6-month period	10.12%	11.94%	-1.82%
Volatility (1Y) Calculated over the trailing 1-year period	15.05%	18.25%	-3.20%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.01%	17.35%	-2.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.96%	18.93%	-2.97%