FOSFX vs. FSPSX

Last updated Jun 4, 2026

FOSFX (Fidelity Overseas Fund) and FSPSX (Fidelity International Index Fund) are both Foreign Large Cap Equities funds from Fidelity. Over the past 10 years, FOSFX returned 8.66%/yr vs 9.45%/yr for FSPSX. With a 0.95 correlation, they move nearly in lockstep. FOSFX charges 0.99%/yr vs 0.04%/yr for FSPSX.

Performance

FOSFX vs. FSPSX - Performance Comparison

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

Returns By Period

In the year-to-date period, FOSFX achieves a 5.41% return, which is significantly lower than FSPSX's 9.51% return. Over the past 10 years, FOSFX has underperformed FSPSX with an annualized return of 8.66%, while FSPSX has yielded a comparatively higher 9.45% annualized return.

FOSFX

• 1D: 0.97%
• 1M: 3.81%
• YTD: 5.41%
• 6M: 7.39%
• 1Y: 8.50%
• 3Y*: 12.53%
• 5Y*: 5.77%
• 10Y*: 8.66%

FSPSX

• 1D: 0.41%
• 1M: 4.06%
• YTD: 9.51%
• 6M: 12.14%
• 1Y: 22.52%
• 3Y*: 17.23%
• 5Y*: 8.91%
• 10Y*: 9.45%

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

FOSFX vs. FSPSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FOSFX Fidelity Overseas Fund	5.41%	20.81%	5.20%	20.56%	-24.79%	19.32%	15.42%	28.43%	-14.73%	28.31%
FSPSX Fidelity International Index Fund	9.51%	31.98%	3.70%	18.31%	-14.23%	11.45%	8.16%	22.03%	-13.55%	25.37%

Correlation

The correlation between FOSFX and FSPSX is 0.95 - 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	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Sep 9, 2011	0.95

The correlation between FOSFX and FSPSX has been stable across timeframes, ranging from 0.94 to 0.95 - a consistent structural relationship.

Return for Risk

FOSFX vs. FSPSX — Risk / Return Rank

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

FOSFX

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

FSPSX

FSPSX Risk / Return Rank: 27
FSPSX Sharpe Ratio Rank: 27
FSPSX Sortino Ratio Rank: 26
FSPSX Omega Ratio Rank: 26
FSPSX Calmar Ratio Rank: 26
FSPSX Martin Ratio Rank: 31

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.

FOSFX vs. FSPSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Overseas Fund (FOSFX) and Fidelity International Index Fund (FSPSX). 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.

	FOSFX	FSPSX	Difference
Sharpe ratio Return per unit of total volatility	0.47	1.47	-1.00
Sortino ratio Return per unit of downside risk	0.79	2.10	-1.31
Omega ratio Gain probability vs. loss probability	1.10	1.27	-0.17
Calmar ratio Return relative to maximum drawdown	0.64	1.91	-1.27
Martin ratio Return relative to average drawdown	2.28	7.16	-4.88
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FOSFX vs. FSPSX - Sharpe Ratio Comparison

The current FOSFX Sharpe Ratio is 0.47, which is lower than the FSPSX Sharpe Ratio of 1.47. The chart below compares the historical Sharpe Ratios of FOSFX and FSPSX, 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

	FOSFX	FSPSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.47	1.47	-1.00
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.33	0.56	-0.23
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.50	0.57	-0.07
Sharpe Ratio (All Time) Calculated using the full available price history	0.47	0.50	-0.03

Drawdowns

FOSFX vs. FSPSX - Drawdown Comparison

The maximum FOSFX drawdown since its inception was -63.51%, which is greater than FSPSX's maximum drawdown of -33.69%. Use the drawdown chart below to compare losses from any high point for FOSFX and FSPSX.

Drawdown Indicators

	FOSFX	FSPSX	Difference
Max Drawdown Largest peak-to-trough decline	-63.51%	-33.69%	-29.82%
Max Drawdown (1Y) Largest decline over 1 year	-12.36%	-11.39%	-0.97%
Max Drawdown (3Y) Largest decline over 3 years	-13.91%	-13.58%	-0.33%
Max Drawdown (5Y) Largest decline over 5 years	-36.51%	-29.41%	-7.10%
Max Drawdown (10Y) Largest decline over 10 years	-36.51%	-33.69%	-2.82%
Current Drawdown Current decline from peak	-1.35%	-0.45%	-0.90%
Average Drawdown Average peak-to-trough decline	-16.96%	-6.55%	-10.41%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.47%	3.03%	+0.44%

Volatility

FOSFX vs. FSPSX - Volatility Comparison

Fidelity Overseas Fund (FOSFX) has a higher volatility of 6.11% compared to Fidelity International Index Fund (FSPSX) at 4.62%. This indicates that FOSFX's price experiences larger fluctuations and is considered to be riskier than FSPSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FOSFX	FSPSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.11%	4.62%	+1.49%
Volatility (6M) Calculated over the trailing 6-month period	14.25%	12.04%	+2.21%
Volatility (1Y) Calculated over the trailing 1-year period	16.72%	14.80%	+1.92%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.73%	15.98%	+1.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.23%	16.56%	+0.67%

FOSFX vs. FSPSX - Expense Ratio Comparison

FOSFX has a 0.99% expense ratio, which is higher than FSPSX's 0.04% expense ratio.

Dividends

FOSFX vs. FSPSX - Dividend Comparison

FOSFX's dividend yield for the trailing twelve months is around 4.62%, more than FSPSX's 2.88% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FOSFX Fidelity Overseas Fund	4.62%	4.87%	1.38%	1.02%	0.77%	4.54%	0.53%	1.35%	5.92%	0.06%	1.96%	1.06%
FSPSX Fidelity International Index Fund	2.88%	3.15%	3.27%	2.79%	2.66%	3.07%	1.84%	3.18%	2.79%	2.50%	3.08%	2.79%

Frequently Asked Questions

Can I hold both FOSFX and FSPSX in my portfolio?

With a correlation of 0.95, FOSFX and FSPSX 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, FOSFX or FSPSX?

FOSFX has higher volatility (6.11%) compared to FSPSX (4.62%). In terms of maximum drawdown, FOSFX dropped -63.51% vs FSPSX's -33.69%.

Which has better risk-adjusted returns?

FSPSX currently has the higher Sharpe Ratio (1.47 vs 0.47), 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.