FSOSX vs. FAOSX

Last updated Jul 17, 2026

FSOSX (Fidelity Series Overseas Fund) and FAOSX (Fidelity Advisor Overseas Fund Class Z) are both Foreign Large Cap Equities funds from Fidelity. Over the past 5 years, FSOSX returned 6.52%/yr vs 3.25%/yr for FAOSX. Their correlation of 0.94 suggests significant overlap in exposure. FSOSX charges 0.01%/yr vs 1.02%/yr for FAOSX.

Performance

FSOSX vs. FAOSX - Performance Comparison

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

Returns By Period

FSOSX

• 1D: 0.57%
• 1M: -1.06%
• 6M: 3.12%
• YTD: 6.30%
• 1Y: 8.64%
• 3Y*: 12.11%
• 5Y*: 6.52%
• 10Y*: —

FAOSX

• 1D: 0.00%
• 1M: 0.00%
• 6M: 0.00%
• YTD: 0.00%
• 1Y: -2.41%
• 3Y*: 7.78%
• 5Y*: 3.25%
• 10Y*: —

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

FSOSX vs. FAOSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
FSOSX Fidelity Series Overseas Fund	6.30%	21.29%	5.87%	21.49%	-23.25%	19.59%	16.36%	7.78%
FAOSX Fidelity Advisor Overseas Fund Class Z	0.00%	15.36%	5.06%	20.52%	-24.31%	19.42%	15.17%	8.49%

Correlation

The correlation between FSOSX and FAOSX is 0.49, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.49
Correlation (3Y) Calculated over the trailing 3-year period	0.84
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (All Time) Calculated using the full available price history since Jun 28, 2019	0.94

Over the past year, the correlation between FSOSX and FAOSX has dropped to 0.49 - well below their long-term average of 0.94, suggesting their price drivers have been diverging.

Return for Risk

FSOSX vs. FAOSX — Risk / Return Rank

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

FSOSX

FSOSX Risk / Return Rank: 10
FSOSX Sharpe Ratio Rank: 9
FSOSX Sortino Ratio Rank: 9
FSOSX Omega Ratio Rank: 9
FSOSX Calmar Ratio Rank: 11
FSOSX Martin Ratio Rank: 13

FAOSX

FAOSX Risk / Return Rank: 1
FAOSX Sharpe Ratio Rank: 1
FAOSX Sortino Ratio Rank: 1
FAOSX Omega Ratio Rank: 1
FAOSX Calmar Ratio Rank: 1
FAOSX Martin Ratio Rank: 1

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.

FSOSX vs. FAOSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Series Overseas Fund (FSOSX) 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.

	FSOSX	FAOSX	Difference
Sharpe ratio: Return per unit of total volatility	0.51	-0.41	+0.92
Sortino ratio: Return per unit of downside risk	0.84	-0.51	+1.35
Omega ratio: Gain probability vs. loss probability	1.10	0.91	+0.19
Calmar ratio: Return relative to maximum drawdown	0.75	-0.47	+1.22
Martin ratio: Return relative to average drawdown	2.61	-0.73	+3.34

FSOSX vs. FAOSX - Sharpe Ratio Comparison

The current FSOSX Sharpe Ratio is 0.51, which is higher than the FAOSX Sharpe Ratio of -0.41. The chart below compares the historical Sharpe Ratios of FSOSX 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.

Drawdowns

FSOSX vs. FAOSX - Drawdown Comparison

The maximum FSOSX drawdown since its inception was -35.36%, roughly equal to the maximum FAOSX drawdown of -36.24%. Use the drawdown chart below to compare losses from any high point for FSOSX and FAOSX.

Drawdown Indicators

	FSOSX	FAOSX	Difference
Max Drawdown Largest peak-to-trough decline	-35.36%	-36.24%	+0.88%
Max Drawdown (1Y) Largest decline over 1 year	-12.39%	-7.26%	-5.13%
Max Drawdown (3Y) Largest decline over 3 years	-14.07%	-13.96%	-0.11%
Max Drawdown (5Y) Largest decline over 5 years	-35.36%	-36.24%	+0.88%
Current Drawdown Current decline from peak	-3.17%	-5.86%	+2.69%
Average Drawdown Average peak-to-trough decline	-7.69%	-7.91%	+0.22%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.56%	4.31%	-0.75%

Volatility

FSOSX vs. FAOSX - Volatility Comparison

Fidelity Series Overseas Fund (FSOSX) has a higher volatility of 5.90% compared to Fidelity Advisor Overseas Fund Class Z (FAOSX) at 0.00%. This indicates that FSOSX'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.

Volatility by Period

	FSOSX	FAOSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.90%	0.00%	+5.90%
Volatility (6M) Calculated over the trailing 6-month period	16.07%	2.59%	+13.48%
Volatility (1Y) Calculated over the trailing 1-year period	18.17%	8.27%	+9.90%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.97%	16.69%	+1.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.12%	16.60%	+2.52%

FSOSX vs. FAOSX - Expense Ratio Comparison

FSOSX has a 0.01% expense ratio, which is lower than FAOSX's 1.02% expense ratio.

Dividends

FSOSX vs. FAOSX - Dividend Comparison

FSOSX's dividend yield for the trailing twelve months is around 8.61%, which matches FAOSX's 8.67% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
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%
FSOSX Fidelity Series Overseas Fund	8.61%	9.15%	2.25%	1.63%	1.80%	2.92%	1.12%	0.37%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FSOSX and FAOSX in my portfolio?

FSOSX and FAOSX have a correlation of 0.49, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FSOSX or FAOSX?

FSOSX has higher volatility (5.90%) compared to FAOSX (0.00%). In terms of maximum drawdown, FSOSX dropped -35.36% vs FAOSX's -36.24%.

Which has better risk-adjusted returns?

FSOSX currently has the higher Sharpe Ratio (0.51 vs -0.41), 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.