OANIX vs. FSOSX

Last updated Aug 5, 2026

OANIX (Oakmark International Fund Institutional Class) and FSOSX (Fidelity Series Overseas Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, OANIX returned 6.06%/yr vs 5.72%/yr for FSOSX. Their 0.78 correlation means they have sometimes moved together and sometimes differently. OANIX charges 0.82%/yr vs 0.01%/yr for FSOSX.

Performance

OANIX vs. FSOSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oakmark International Fund Institutional Class (OANIX) and Fidelity Series Overseas Fund (FSOSX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with OANIX having a 7.32% return and FSOSX slightly lower at 6.97%.

OANIX

• 1D: 1.08%
• 1M: 3.98%
• 6M: 4.26%
• YTD: 7.32%
• 1Y: 19.09%
• 3Y*: 11.06%
• 5Y*: 6.06%
• 10Y*: —
• ALL TIME*: 7.01%

FSOSX

• 1D: 0.95%
• 1M: -0.44%
• 6M: 2.70%
• YTD: 6.97%
• 1Y: 10.01%
• 3Y*: 13.63%
• 5Y*: 5.72%
• 10Y*: —
• ALL TIME*: 9.63%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
FSOSX Fidelity Series Overseas Fund	$0.00	$0.00	$0.00
OANIX Oakmark International Fund Institutional Class	$0.00	$0.00	$0.00

OANIX vs. FSOSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
OANIX Oakmark International Fund Institutional Class	7.32%	32.74%	-4.38%	19.18%	-15.52%	9.28%	5.15%	10.99%
FSOSX Fidelity Series Overseas Fund	6.97%	21.29%	5.87%	21.49%	-23.25%	19.59%	16.36%	7.78%

Correlation

The correlation between OANIX and FSOSX is 0.66, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.66
Correlation (3Y) Balances recent behavior with more history.	0.72
Correlation (5Y) Shows whether the relationship held over a longer period.	0.79
Correlation (All Time) Calculated using the full available price history since Jun 28, 2019	0.78

The correlation between OANIX and FSOSX shifts across timeframes, from 0.66 (1 year) to 0.79 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

OANIX vs. FSOSX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

OANIX

OANIX Risk / Return Rank: 31
OANIX Sharpe Ratio Rank: 35
OANIX Sortino Ratio Rank: 34
OANIX Omega Ratio Rank: 34
OANIX Calmar Ratio Rank: 26
OANIX Martin Ratio Rank: 26

FSOSX

FSOSX Risk / Return Rank: 18
FSOSX Sharpe Ratio Rank: 15
FSOSX Sortino Ratio Rank: 16
FSOSX Omega Ratio Rank: 16
FSOSX Calmar Ratio Rank: 19
FSOSX Martin Ratio Rank: 22

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

OANIX vs. FSOSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oakmark International Fund Institutional Class (OANIX) 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.

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.

	OANIX	FSOSX	Difference
Sharpe ratio: Return per unit of total volatility	1.32	0.64	+0.69
Sortino ratio: Return per unit of downside risk	1.88	1.03	+0.85
Omega ratio: Gain probability vs. loss probability	1.24	1.13	+0.12
Calmar ratio: Return relative to maximum drawdown	1.37	0.95	+0.42
Martin ratio: Return relative to average drawdown	4.22	3.24	+0.98

OANIX vs. FSOSX - Sharpe Ratio Comparison

The current OANIX Sharpe Ratio is 1.32, which is higher than the FSOSX Sharpe Ratio of 0.64. The chart below compares the historical Sharpe Ratios of OANIX and FSOSX, 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

OANIX vs. FSOSX - Drawdown Comparison

The maximum OANIX drawdown since its inception was -52.85%, which is greater than FSOSX's maximum drawdown of -35.36%. Use the drawdown chart below to compare losses from any high point for OANIX and FSOSX.

Drawdown Indicators

	OANIX	FSOSX	Difference
Max Drawdown Largest peak-to-trough decline	-52.85%	-35.36%	-17.49%
Max Drawdown (1Y) Largest decline over 1 year	-14.34%	-12.39%	-1.95%
Max Drawdown (3Y) Largest decline over 3 years	-17.00%	-14.07%	-2.93%
Max Drawdown (5Y) Largest decline over 5 years	-35.50%	-35.36%	-0.14%
Current Drawdown Current decline from peak	0.00%	-2.56%	+2.56%
Average Drawdown Average peak-to-trough decline	-12.42%	-7.67%	-4.75%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.66%	3.65%	+1.01%

Volatility

OANIX vs. FSOSX - Volatility Comparison

The current volatility for Oakmark International Fund Institutional Class (OANIX) is 3.78%, while Fidelity Series Overseas Fund (FSOSX) has a volatility of 6.08%. This indicates that OANIX 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

	OANIX	FSOSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.78%	6.08%	-2.30%
Volatility (6M) Calculated over the trailing 6-month period	12.17%	16.57%	-4.40%
Volatility (1Y) Calculated over the trailing 1-year period	14.91%	18.58%	-3.67%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.11%	18.06%	+1.05%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.25%	19.14%	+2.11%

OANIX vs. FSOSX - Expense Ratio Comparison

OANIX has a 0.82% expense ratio, which is higher than FSOSX's 0.01% expense ratio.

Dividends

OANIX vs. FSOSX - Dividend Comparison

OANIX's dividend yield for the trailing twelve months is around 1.97%, less than FSOSX's 8.55% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FSOSX Fidelity Series Overseas Fund	8.55%	9.15%	2.25%	1.63%	1.80%	2.92%	1.12%	0.37%	0.00%	0.00%
OANIX Oakmark International Fund Institutional Class	1.97%	2.12%	2.78%	2.11%	3.31%	1.51%	0.54%	2.01%	7.49%	1.52%

Frequently Asked Questions

Can I hold both OANIX and FSOSX in my portfolio?

OANIX and FSOSX have a correlation of 0.66, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OANIX or FSOSX?

FSOSX has higher volatility (6.08%) compared to OANIX (3.78%). In terms of maximum drawdown, OANIX dropped -52.85% vs FSOSX's -35.36%.

Which has better risk-adjusted returns?

OANIX currently has the higher Sharpe Ratio (1.32 vs 0.64), 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.