FDKFX vs. FSOSX

Last updated Aug 5, 2026

FDKFX (Fidelity International Discovery K6 Fund) and FSOSX (Fidelity Series Overseas Fund) are both Foreign Large Cap Equities funds from Fidelity. Over the past 5 years, FDKFX returned 6.83%/yr vs 5.72%/yr for FSOSX. Their 0.96 correlation means they have historically moved very closely together. FDKFX charges 0.60%/yr vs 0.01%/yr for FSOSX.

Performance

FDKFX vs. FSOSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity International Discovery K6 Fund (FDKFX) and Fidelity Series Overseas Fund (FSOSX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FDKFX achieves a 12.17% return, which is significantly higher than FSOSX's 6.97% return.

FDKFX

• 1D: 0.71%
• 1M: -0.54%
• 6M: 4.66%
• YTD: 12.17%
• 1Y: 22.12%
• 3Y*: 18.96%
• 5Y*: 6.83%
• 10Y*: —
• ALL TIME*: 10.93%

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)
FDKFX Fidelity International Discovery K6 Fund	$0.00	$0.00	$0.00
FSOSX Fidelity Series Overseas Fund	$0.00	$0.00	$0.00

FDKFX vs. FSOSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
FDKFX Fidelity International Discovery K6 Fund	12.17%	29.31%	11.14%	14.40%	-24.74%	11.20%	21.50%	10.05%
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 FDKFX and FSOSX is 0.96 - they have historically moved very closely together. At this level, their price movements offset little of one another.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.96
Correlation (3Y) Balances recent behavior with more history.	0.96
Correlation (5Y) Shows whether the relationship held over a longer period.	0.96
Correlation (All Time) Calculated using the full available price history since Jun 28, 2019	0.96

The correlation between FDKFX and FSOSX has been stable across timeframes, ranging from 0.96 to 0.96 - a consistent structural relationship.

Return for Risk

FDKFX vs. FSOSX — Risk / Return Rank

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

FDKFX

FDKFX Risk / Return Rank: 38
FDKFX Sharpe Ratio Rank: 37
FDKFX Sortino Ratio Rank: 35
FDKFX Omega Ratio Rank: 34
FDKFX Calmar Ratio Rank: 41
FDKFX Martin Ratio Rank: 43

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.

FDKFX vs. FSOSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity International Discovery K6 Fund (FDKFX) 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.

	FDKFX	FSOSX	Difference
Sharpe ratio: Return per unit of total volatility	1.30	0.64	+0.66
Sortino ratio: Return per unit of downside risk	1.86	1.03	+0.84
Omega ratio: Gain probability vs. loss probability	1.23	1.13	+0.11
Calmar ratio: Return relative to maximum drawdown	1.87	0.95	+0.91
Martin ratio: Return relative to average drawdown	6.84	3.24	+3.61

FDKFX vs. FSOSX - Sharpe Ratio Comparison

The current FDKFX Sharpe Ratio is 1.30, which is higher than the FSOSX Sharpe Ratio of 0.64. The chart below compares the historical Sharpe Ratios of FDKFX 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

FDKFX vs. FSOSX - Drawdown Comparison

The maximum FDKFX drawdown since its inception was -36.63%, roughly equal to the maximum FSOSX drawdown of -35.36%. Use the drawdown chart below to compare losses from any high point for FDKFX and FSOSX.

Drawdown Indicators

	FDKFX	FSOSX	Difference
Max Drawdown Largest peak-to-trough decline	-36.63%	-35.36%	-1.27%
Max Drawdown (1Y) Largest decline over 1 year	-13.12%	-12.39%	-0.73%
Max Drawdown (3Y) Largest decline over 3 years	-14.64%	-14.07%	-0.57%
Max Drawdown (5Y) Largest decline over 5 years	-36.63%	-35.36%	-1.27%
Current Drawdown Current decline from peak	-2.44%	-2.56%	+0.12%
Average Drawdown Average peak-to-trough decline	-9.37%	-7.67%	-1.70%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.57%	3.65%	-0.08%

Volatility

FDKFX vs. FSOSX - Volatility Comparison

Fidelity International Discovery K6 Fund (FDKFX) and Fidelity Series Overseas Fund (FSOSX) have volatilities of 5.89% and 6.08%, 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

	FDKFX	FSOSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.89%	6.08%	-0.19%
Volatility (6M) Calculated over the trailing 6-month period	16.34%	16.57%	-0.23%
Volatility (1Y) Calculated over the trailing 1-year period	18.94%	18.58%	+0.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.47%	18.06%	-0.59%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.92%	19.14%	-0.22%

FDKFX vs. FSOSX - Expense Ratio Comparison

FDKFX has a 0.60% expense ratio, which is higher than FSOSX's 0.01% expense ratio.

Dividends

FDKFX vs. FSOSX - Dividend Comparison

FDKFX's dividend yield for the trailing twelve months is around 2.74%, less than FSOSX's 8.55% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
FDKFX Fidelity International Discovery K6 Fund	2.74%	3.07%	4.06%	1.62%	0.99%	1.90%	0.60%	0.80%
FSOSX Fidelity Series Overseas Fund	8.55%	9.15%	2.25%	1.63%	1.80%	2.92%	1.12%	0.37%

Frequently Asked Questions

Can I hold both FDKFX and FSOSX in my portfolio?

With a correlation of 0.96, FDKFX 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, FDKFX or FSOSX?

FSOSX has higher volatility (6.08%) compared to FDKFX (5.89%). In terms of maximum drawdown, FDKFX dropped -36.63% vs FSOSX's -35.36%.

Which has better risk-adjusted returns?

FDKFX currently has the higher Sharpe Ratio (1.30 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.