WILIX vs. FHLFX

Last updated Jun 4, 2026

WILIX (William Blair International Leaders Fund) and FHLFX (Fidelity Series International Index Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, WILIX returned 3.81%/yr vs 8.85%/yr for FHLFX. Their correlation of 0.84 suggests significant overlap in exposure. WILIX charges 0.90%/yr vs 0.01%/yr for FHLFX.

Performance

WILIX vs. FHLFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in William Blair International Leaders Fund (WILIX) and Fidelity Series International Index Fund (FHLFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, WILIX achieves a 16.99% return, which is significantly higher than FHLFX's 9.53% return.

WILIX

• 1D: 0.47%
• 1M: 6.69%
• YTD: 16.99%
• 6M: 20.27%
• 1Y: 28.51%
• 3Y*: 13.74%
• 5Y*: 3.81%
• 10Y*: 9.27%

FHLFX

• 1D: 0.42%
• 1M: 4.09%
• YTD: 9.53%
• 6M: 12.09%
• 1Y: 22.51%
• 3Y*: 17.18%
• 5Y*: 8.85%
• 10Y*: —

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

WILIX vs. FHLFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
WILIX William Blair International Leaders Fund	16.99%	23.21%	-0.50%	13.10%	-28.55%	10.16%	26.79%	31.76%	-14.41%
FHLFX Fidelity Series International Index Fund	9.53%	31.96%	3.67%	18.16%	-14.17%	11.23%	8.09%	21.66%	-10.70%

Correlation

The correlation between WILIX and FHLFX is 0.65, 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	0.65
Correlation (3Y) Calculated over the trailing 3-year period	0.78
Correlation (5Y) Calculated over the trailing 5-year period	0.83
Correlation (All Time) Calculated using the full available price history since Sep 5, 2018	0.84

The correlation between WILIX and FHLFX shifts across timeframes, from 0.65 (1 year) to 0.84 (all time), reflecting how their relationship changes across market environments.

Return for Risk

WILIX vs. FHLFX — Risk / Return Rank

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

WILIX

WILIX Risk / Return Rank: 35
WILIX Sharpe Ratio Rank: 36
WILIX Sortino Ratio Rank: 33
WILIX Omega Ratio Rank: 39
WILIX Calmar Ratio Rank: 30
WILIX Martin Ratio Rank: 35

FHLFX

FHLFX Risk / Return Rank: 27
FHLFX Sharpe Ratio Rank: 26
FHLFX Sortino Ratio Rank: 26
FHLFX Omega Ratio Rank: 26
FHLFX Calmar Ratio Rank: 26
FHLFX 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.

WILIX vs. FHLFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for William Blair International Leaders Fund (WILIX) and Fidelity Series International Index Fund (FHLFX). 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.

	WILIX	FHLFX	Difference
Sharpe ratio Return per unit of total volatility	1.75	1.47	+0.28
Sortino ratio Return per unit of downside risk	2.41	2.10	+0.31
Omega ratio Gain probability vs. loss probability	1.34	1.27	+0.07
Calmar ratio Return relative to maximum drawdown	2.07	1.91	+0.16
Martin ratio Return relative to average drawdown	7.72	7.17	+0.55
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WILIX vs. FHLFX - Sharpe Ratio Comparison

The current WILIX Sharpe Ratio is 1.75, which is comparable to the FHLFX Sharpe Ratio of 1.47. The chart below compares the historical Sharpe Ratios of WILIX and FHLFX, 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

	WILIX	FHLFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.75	1.47	+0.28
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.22	0.56	-0.34
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.52	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.51	0.53	-0.01

Drawdowns

WILIX vs. FHLFX - Drawdown Comparison

The maximum WILIX drawdown since its inception was -41.01%, which is greater than FHLFX's maximum drawdown of -33.58%. Use the drawdown chart below to compare losses from any high point for WILIX and FHLFX.

Drawdown Indicators

	WILIX	FHLFX	Difference
Max Drawdown Largest peak-to-trough decline	-41.01%	-33.58%	-7.43%
Max Drawdown (1Y) Largest decline over 1 year	-13.67%	-11.37%	-2.30%
Max Drawdown (3Y) Largest decline over 3 years	-18.21%	-13.62%	-4.59%
Max Drawdown (5Y) Largest decline over 5 years	-41.01%	-29.36%	-11.65%
Max Drawdown (10Y) Largest decline over 10 years	-41.01%	—	—
Current Drawdown Current decline from peak	0.00%	-0.42%	+0.42%
Average Drawdown Average peak-to-trough decline	-9.78%	-6.11%	-3.67%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.66%	3.03%	+0.63%

Volatility

WILIX vs. FHLFX - Volatility Comparison

William Blair International Leaders Fund (WILIX) has a higher volatility of 6.21% compared to Fidelity Series International Index Fund (FHLFX) at 4.64%. This indicates that WILIX's price experiences larger fluctuations and is considered to be riskier than FHLFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WILIX	FHLFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.21%	4.64%	+1.57%
Volatility (6M) Calculated over the trailing 6-month period	13.66%	12.08%	+1.58%
Volatility (1Y) Calculated over the trailing 1-year period	16.18%	14.83%	+1.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.82%	15.98%	+1.84%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.73%	17.64%	+0.09%

WILIX vs. FHLFX - Expense Ratio Comparison

WILIX has a 0.90% expense ratio, which is higher than FHLFX's 0.01% expense ratio.

Dividends

WILIX vs. FHLFX - Dividend Comparison

WILIX's dividend yield for the trailing twelve months is around 6.82%, more than FHLFX's 3.16% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FHLFX Fidelity Series International Index Fund	3.16%	3.46%	2.98%	2.86%	2.60%	2.47%	1.92%	1.95%	0.62%	0.00%	0.00%	0.00%
WILIX William Blair International Leaders Fund	6.82%	7.98%	0.58%	0.45%	0.19%	2.82%	0.80%	0.56%	4.14%	2.17%	1.01%	0.74%

Frequently Asked Questions

Can I hold both WILIX and FHLFX in my portfolio?

WILIX and FHLFX have a correlation of 0.65, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, WILIX or FHLFX?

WILIX has higher volatility (6.21%) compared to FHLFX (4.64%). In terms of maximum drawdown, WILIX dropped -41.01% vs FHLFX's -33.58%.

Which has better risk-adjusted returns?

WILIX currently has the higher Sharpe Ratio (1.75 vs 1.47), 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.