BTLSX vs. FSOSX

Last updated Jun 24, 2026

BTLSX (Baillie Gifford International Concentrated Growth Equities Fund) and FSOSX (Fidelity Series Overseas Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, BTLSX returned -2.81%/yr vs 7.40%/yr for FSOSX. A 0.77 correlation means they provide meaningful diversification when combined. BTLSX charges 0.81%/yr vs 0.01%/yr for FSOSX.

Performance

BTLSX vs. FSOSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Baillie Gifford International Concentrated Growth Equities Fund (BTLSX) 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, BTLSX achieves a -7.50% return, which is significantly lower than FSOSX's 9.78% return.

BTLSX

• 1D: 0.00%
• 1M: 0.00%
• YTD: -7.50%
• 6M: -7.18%
• 1Y: -7.71%
• 3Y*: 8.52%
• 5Y*: -2.81%
• 10Y*: —

FSOSX

• 1D: 0.61%
• 1M: 5.33%
• YTD: 9.78%
• 6M: 9.27%
• 1Y: 14.49%
• 3Y*: 14.96%
• 5Y*: 7.40%
• 10Y*: —

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

BTLSX vs. FSOSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
BTLSX Baillie Gifford International Concentrated Growth Equities Fund	-7.50%	16.56%	18.34%	14.75%	-39.64%	0.71%	100.15%	15.30%
FSOSX Fidelity Series Overseas Fund	9.78%	21.29%	5.87%	21.49%	-23.25%	19.59%	16.36%	7.78%

Correlation

The correlation between BTLSX and FSOSX is 0.70, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.70
Correlation (3Y) Calculated over the trailing 3-year period	0.75
Correlation (5Y) Calculated over the trailing 5-year period	0.77
Correlation (All Time) Calculated using the full available price history since Jun 28, 2019	0.77

The correlation between BTLSX and FSOSX has been stable across timeframes, ranging from 0.70 to 0.77 - a consistent structural relationship.

Return for Risk

BTLSX vs. FSOSX — Risk / Return Rank

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

BTLSX

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

FSOSX

FSOSX Risk / Return Rank: 14
FSOSX Sharpe Ratio Rank: 12
FSOSX Sortino Ratio Rank: 13
FSOSX Omega Ratio Rank: 12
FSOSX Calmar Ratio Rank: 15
FSOSX Martin Ratio Rank: 18

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.

BTLSX vs. FSOSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Baillie Gifford International Concentrated Growth Equities Fund (BTLSX) 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.

	BTLSX	FSOSX	Difference
Sharpe ratio: Return per unit of total volatility	-0.43	0.88	-1.31
Sortino ratio: Return per unit of downside risk	-0.48	1.35	-1.83
Omega ratio: Gain probability vs. loss probability	0.94	1.17	-0.23
Calmar ratio: Return relative to maximum drawdown	-0.39	1.25	-1.65
Martin ratio: Return relative to average drawdown	-0.91	4.43	-5.34

BTLSX vs. FSOSX - Sharpe Ratio Comparison

The current BTLSX Sharpe Ratio is -0.43, which is lower than the FSOSX Sharpe Ratio of 0.88. The chart below compares the historical Sharpe Ratios of BTLSX 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

BTLSX vs. FSOSX - Drawdown Comparison

The maximum BTLSX drawdown since its inception was -56.26%, which is greater than FSOSX's maximum drawdown of -35.36%. Use the drawdown chart below to compare losses from any high point for BTLSX and FSOSX.

Drawdown Indicators

	BTLSX	FSOSX	Difference
Max Drawdown Largest peak-to-trough decline	-56.26%	-35.36%	-20.90%
Max Drawdown (1Y) Largest decline over 1 year	-21.66%	-12.39%	-9.27%
Max Drawdown (3Y) Largest decline over 3 years	-25.32%	-14.07%	-11.25%
Max Drawdown (5Y) Largest decline over 5 years	-55.86%	-35.36%	-20.50%
Current Drawdown Current decline from peak	-24.08%	0.00%	-24.08%
Average Drawdown Average peak-to-trough decline	-20.64%	-7.74%	-12.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.35%	3.49%	+5.86%

Volatility

BTLSX vs. FSOSX - Volatility Comparison

The current volatility for Baillie Gifford International Concentrated Growth Equities Fund (BTLSX) is 3.86%, while Fidelity Series Overseas Fund (FSOSX) has a volatility of 6.30%. This indicates that BTLSX 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

	BTLSX	FSOSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.86%	6.30%	-2.44%
Volatility (6M) Calculated over the trailing 6-month period	15.70%	15.32%	+0.38%
Volatility (1Y) Calculated over the trailing 1-year period	20.01%	17.64%	+2.37%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	29.12%	17.85%	+11.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	28.38%	19.10%	+9.28%

BTLSX vs. FSOSX - Expense Ratio Comparison

BTLSX has a 0.81% expense ratio, which is higher than FSOSX's 0.01% expense ratio.

Dividends

BTLSX vs. FSOSX - Dividend Comparison

BTLSX has not paid dividends to shareholders, while FSOSX's dividend yield for the trailing twelve months is around 8.33%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
BTLSX Baillie Gifford International Concentrated Growth Equities Fund	0.00%	0.00%	0.00%	0.00%	6.18%	25.27%	102.72%	0.17%
FSOSX Fidelity Series Overseas Fund	8.33%	9.15%	2.25%	1.63%	1.80%	2.92%	1.12%	0.37%

Frequently Asked Questions

Can I hold both BTLSX and FSOSX in my portfolio?

BTLSX and FSOSX have a correlation of 0.70, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BTLSX or FSOSX?

FSOSX has higher volatility (6.30%) compared to BTLSX (3.86%). In terms of maximum drawdown, BTLSX dropped -56.26% vs FSOSX's -35.36%.

Which has better risk-adjusted returns?

FSOSX currently has the higher Sharpe Ratio (0.88 vs -0.43), 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.