FOSKX vs. FSOSX

Last updated Jun 4, 2026

FOSKX (Fidelity Overseas Fund Class K) and FSOSX (Fidelity Series Overseas Fund) are both Foreign Large Cap Equities funds from Fidelity. Over the past 5 years, FOSKX returned 5.87%/yr vs 6.73%/yr for FSOSX. With a 1.00 correlation, they move nearly in lockstep. FOSKX charges 0.89%/yr vs 0.01%/yr for FSOSX.

Performance

FOSKX vs. FSOSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Overseas Fund Class K (FOSKX) 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 investments are quite close, with FOSKX having a 5.45% return and FSOSX slightly higher at 5.63%.

FOSKX

• 1D: 0.96%
• 1M: 3.82%
• YTD: 5.45%
• 6M: 7.42%
• 1Y: 8.57%
• 3Y*: 12.62%
• 5Y*: 5.87%
• 10Y*: 8.76%

FSOSX

• 1D: 0.96%
• 1M: 3.89%
• YTD: 5.63%
• 6M: 7.55%
• 1Y: 8.98%
• 3Y*: 13.16%
• 5Y*: 6.73%
• 10Y*: —

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

FOSKX vs. FSOSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
FOSKX Fidelity Overseas Fund Class K	5.45%	20.90%	5.28%	20.70%	-24.71%	19.43%	15.55%	7.84%
FSOSX Fidelity Series Overseas Fund	5.63%	21.29%	5.87%	21.49%	-23.25%	19.59%	16.36%	7.78%

Correlation

The correlation between FOSKX and FSOSX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	1.00
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (All Time) Calculated using the full available price history since Jul 1, 2019	1.00

The correlation between FOSKX and FSOSX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.

Return for Risk

FOSKX vs. FSOSX — Risk / Return Rank

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

FOSKX

FOSKX Risk / Return Rank: 6
FOSKX Sharpe Ratio Rank: 6
FOSKX Sortino Ratio Rank: 6
FOSKX Omega Ratio Rank: 6
FOSKX Calmar Ratio Rank: 6
FOSKX Martin Ratio Rank: 8

FSOSX

FSOSX Risk / Return Rank: 7
FSOSX Sharpe Ratio Rank: 6
FSOSX Sortino Ratio Rank: 6
FSOSX Omega Ratio Rank: 6
FSOSX Calmar Ratio Rank: 7
FSOSX Martin Ratio Rank: 8

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.

FOSKX vs. FSOSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Overseas Fund Class K (FOSKX) 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.

	FOSKX	FSOSX	Difference
Sharpe ratio: Return per unit of total volatility	0.48	0.50	-0.02
Sortino ratio: Return per unit of downside risk	0.80	0.83	-0.03
Omega ratio: Gain probability vs. loss probability	1.10	1.10	0.00
Calmar ratio: Return relative to maximum drawdown	0.65	0.68	-0.03
Martin ratio: Return relative to average drawdown	2.31	2.42	-0.11
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FOSKX vs. FSOSX - Sharpe Ratio Comparison

The current FOSKX Sharpe Ratio is 0.48, which is comparable to the FSOSX Sharpe Ratio of 0.50. The chart below compares the historical Sharpe Ratios of FOSKX 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.

Sharpe Ratios by Period

	FOSKX	FSOSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.48	0.50	-0.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.33	0.38	-0.05
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.51	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.25	0.51	-0.26

Drawdowns

FOSKX vs. FSOSX - Drawdown Comparison

The maximum FOSKX drawdown since its inception was -59.28%, which is greater than FSOSX's maximum drawdown of -35.36%. Use the drawdown chart below to compare losses from any high point for FOSKX and FSOSX.

Drawdown Indicators

	FOSKX	FSOSX	Difference
Max Drawdown Largest peak-to-trough decline	-59.28%	-35.36%	-23.92%
Max Drawdown (1Y) Largest decline over 1 year	-12.35%	-12.39%	+0.04%
Max Drawdown (3Y) Largest decline over 3 years	-13.91%	-14.07%	+0.16%
Max Drawdown (5Y) Largest decline over 5 years	-36.45%	-35.36%	-1.09%
Max Drawdown (10Y) Largest decline over 10 years	-36.45%	—	—
Current Drawdown Current decline from peak	-1.33%	-1.31%	-0.02%
Average Drawdown Average peak-to-trough decline	-14.38%	-7.78%	-6.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.47%	3.46%	+0.01%

Volatility

FOSKX vs. FSOSX - Volatility Comparison

Fidelity Overseas Fund Class K (FOSKX) and Fidelity Series Overseas Fund (FSOSX) have volatilities of 6.10% and 6.14%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FOSKX	FSOSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.10%	6.14%	-0.04%
Volatility (6M) Calculated over the trailing 6-month period	14.26%	14.30%	-0.04%
Volatility (1Y) Calculated over the trailing 1-year period	16.74%	16.80%	-0.06%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.74%	17.67%	+0.07%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.24%	19.05%	-1.81%

FOSKX vs. FSOSX - Expense Ratio Comparison

FOSKX has a 0.89% expense ratio, which is higher than FSOSX's 0.01% expense ratio.

Dividends

FOSKX vs. FSOSX - Dividend Comparison

FOSKX's dividend yield for the trailing twelve months is around 4.70%, less than FSOSX's 8.66% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FOSKX Fidelity Overseas Fund Class K	4.70%	4.96%	1.84%	1.13%	0.88%	4.64%	0.62%	1.44%	6.08%	0.06%	2.09%	1.17%
FSOSX Fidelity Series Overseas Fund	8.66%	9.15%	2.25%	1.63%	1.80%	2.92%	1.12%	0.37%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FOSKX and FSOSX in my portfolio?

With a correlation of 1.00, FOSKX and FSOSX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, FOSKX or FSOSX?

FSOSX has higher volatility (6.14%) compared to FOSKX (6.10%). In terms of maximum drawdown, FOSKX dropped -59.28% vs FSOSX's -35.36%.

Which has better risk-adjusted returns?

FSOSX currently has the higher Sharpe Ratio (0.50 vs 0.48), 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.