BISLX vs. FSOSX

Last updated Jun 24, 2026

BISLX (Brown Advisory Sustainable International Leaders Fund) and FSOSX (Fidelity Series Overseas Fund) are both Foreign Large Cap Equities funds. Over the past 3 years, BISLX returned 4.39%/yr vs 14.96%/yr for FSOSX. Their correlation of 0.91 suggests significant overlap in exposure. BISLX charges 1.00%/yr vs 0.01%/yr for FSOSX.

Performance

BISLX vs. FSOSX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Brown Advisory Sustainable International Leaders Fund (BISLX) 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, BISLX achieves a -4.46% return, which is significantly lower than FSOSX's 9.78% return.

BISLX

• 1D: -0.71%
• 1M: -0.80%
• YTD: -4.46%
• 6M: -4.74%
• 1Y: -2.48%
• 3Y*: 4.39%
• 5Y*: —
• 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)

BISLX vs. FSOSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
BISLX Brown Advisory Sustainable International Leaders Fund	-4.46%	15.31%	1.50%	15.76%	-4.60%
FSOSX Fidelity Series Overseas Fund	9.78%	21.29%	5.87%	21.49%	-9.11%

Correlation

The correlation between BISLX and FSOSX is 0.84, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.84
Correlation (3Y) Calculated over the trailing 3-year period	0.88
Correlation (All Time) Calculated using the full available price history since Mar 4, 2022	0.91

The correlation between BISLX and FSOSX has been stable across timeframes, ranging from 0.84 to 0.91 - a consistent structural relationship.

Return for Risk

BISLX vs. FSOSX — Risk / Return Rank

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

BISLX

BISLX Risk / Return Rank: 2
BISLX Sharpe Ratio Rank: 2
BISLX Sortino Ratio Rank: 2
BISLX Omega Ratio Rank: 2
BISLX Calmar Ratio Rank: 2
BISLX Martin Ratio Rank: 2

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.

BISLX vs. FSOSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Brown Advisory Sustainable International Leaders Fund (BISLX) 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.

	BISLX	FSOSX	Difference
Sharpe ratio: Return per unit of total volatility	-0.10	0.88	-0.99
Sortino ratio: Return per unit of downside risk	-0.04	1.35	-1.39
Omega ratio: Gain probability vs. loss probability	1.00	1.17	-0.17
Calmar ratio: Return relative to maximum drawdown	-0.12	1.25	-1.37
Martin ratio: Return relative to average drawdown	-0.34	4.43	-4.78

BISLX vs. FSOSX - Sharpe Ratio Comparison

The current BISLX Sharpe Ratio is -0.10, which is lower than the FSOSX Sharpe Ratio of 0.88. The chart below compares the historical Sharpe Ratios of BISLX 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

BISLX vs. FSOSX - Drawdown Comparison

The maximum BISLX drawdown since its inception was -24.49%, smaller than the maximum FSOSX drawdown of -35.36%. Use the drawdown chart below to compare losses from any high point for BISLX and FSOSX.

Drawdown Indicators

	BISLX	FSOSX	Difference
Max Drawdown Largest peak-to-trough decline	-24.49%	-35.36%	+10.87%
Max Drawdown (1Y) Largest decline over 1 year	-13.12%	-12.39%	-0.73%
Max Drawdown (3Y) Largest decline over 3 years	-18.16%	-14.07%	-4.09%
Max Drawdown (5Y) Largest decline over 5 years	—	-35.36%	—
Current Drawdown Current decline from peak	-6.85%	0.00%	-6.85%
Average Drawdown Average peak-to-trough decline	-6.04%	-7.74%	+1.70%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.58%	3.49%	+1.09%

Volatility

BISLX vs. FSOSX - Volatility Comparison

The current volatility for Brown Advisory Sustainable International Leaders Fund (BISLX) is 4.51%, while Fidelity Series Overseas Fund (FSOSX) has a volatility of 6.30%. This indicates that BISLX 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

	BISLX	FSOSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.51%	6.30%	-1.79%
Volatility (6M) Calculated over the trailing 6-month period	12.42%	15.32%	-2.90%
Volatility (1Y) Calculated over the trailing 1-year period	15.21%	17.64%	-2.43%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.21%	17.85%	-0.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.21%	19.10%	-1.89%

BISLX vs. FSOSX - Expense Ratio Comparison

BISLX has a 1.00% expense ratio, which is higher than FSOSX's 0.01% expense ratio.

Dividends

BISLX vs. FSOSX - Dividend Comparison

BISLX's dividend yield for the trailing twelve months is around 3.77%, less than FSOSX's 8.33% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
BISLX Brown Advisory Sustainable International Leaders Fund	3.77%	3.60%	1.12%	0.36%	0.24%	0.00%	0.00%	0.00%
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 BISLX and FSOSX in my portfolio?

BISLX and FSOSX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BISLX or FSOSX?

FSOSX has higher volatility (6.30%) compared to BISLX (4.51%). In terms of maximum drawdown, BISLX dropped -24.49% vs FSOSX's -35.36%.

Which has better risk-adjusted returns?

FSOSX currently has the higher Sharpe Ratio (0.88 vs -0.10), 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.