WBIIX vs. FAOSX
WBIIX (William Blair Institutional International Growth Fund) and FAOSX (Fidelity Advisor Overseas Fund Class Z) are both Foreign Large Cap Equities funds. Over the past 5 years, WBIIX returned 1.81%/yr vs 2.86%/yr for FAOSX. Their correlation of 0.87 means they have usually moved in the same direction. WBIIX charges 0.98%/yr vs 1.02%/yr for FAOSX.
Performance
WBIIX vs. FAOSX - Performance Comparison
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Returns By Period
WBIIX
- 1D
- -0.19%
- 1M
- -4.22%
- 6M
- 5.03%
- YTD
- 10.58%
- 1Y
- 18.80%
- 3Y*
- 11.45%
- 5Y*
- 1.81%
- 10Y*
- 8.14%
- ALL TIME*
- 7.95%
FAOSX
- 1D
- 0.00%
- 1M
- 0.00%
- 6M
- 0.00%
- YTD
- 0.00%
- 1Y
- -0.26%
- 3Y*
- 7.96%
- 5Y*
- 2.86%
- 10Y*
- —
- ALL TIME*
- 8.10%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
WBIIX vs. FAOSX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
WBIIX William Blair Institutional International Growth Fund | 10.58% | 18.16% | 2.40% | 15.23% | -28.39% | 9.30% | 32.69% | 30.75% | -17.49% | 24.71% |
FAOSX Fidelity Advisor Overseas Fund Class Z | 0.00% | 15.36% | 5.06% | 20.52% | -24.31% | 19.42% | 15.17% | 27.96% | -14.73% | 26.25% |
Correlation
The correlation between WBIIX and FAOSX is 0.37, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.37 |
Correlation (3Y) Balances recent behavior with more history. | 0.73 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.84 |
Correlation (All Time) Calculated using the full available price history since Feb 1, 2017 | 0.87 |
Over the past year, the correlation between WBIIX and FAOSX has dropped to 0.37 - well below their long-term average of 0.87, suggesting their price drivers have been diverging.
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Return for Risk
WBIIX vs. FAOSX — Risk / Return Rank
WBIIX
FAOSX
WBIIX vs. FAOSX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for William Blair Institutional International Growth Fund (WBIIX) and Fidelity Advisor Overseas Fund Class Z (FAOSX). 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.
| WBIIX | FAOSX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.33 | ||
| Sortino ratioReturn per unit of downside risk | +1.85 | ||
| Omega ratioGain probability vs. loss probability | 1.20 | 0.93 | +0.27 |
| Calmar ratioReturn relative to maximum drawdown | 1.37 | -0.32 | +1.69 |
| Martin ratioReturn relative to average drawdown | 4.62 | -0.48 | +5.11 |
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Drawdowns
WBIIX vs. FAOSX - Drawdown Comparison
The maximum WBIIX drawdown since its inception was -65.13%, which is greater than FAOSX's maximum drawdown of -36.24%. Use the drawdown chart below to compare losses from any high point for WBIIX and FAOSX.
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Drawdown Indicators
| WBIIX | FAOSX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -65.13% | -36.24% | -28.89% |
Max Drawdown (1Y)Largest decline over 1 year | -13.17% | -7.26% | -5.91% |
Max Drawdown (3Y)Largest decline over 3 years | -17.06% | -13.96% | -3.10% |
Max Drawdown (5Y)Largest decline over 5 years | -40.91% | -36.24% | -4.67% |
Max Drawdown (10Y)Largest decline over 10 years | -40.91% | — | — |
Current DrawdownCurrent decline from peak | -6.75% | -5.86% | -0.89% |
Average DrawdownAverage peak-to-trough decline | -14.72% | -7.90% | -6.82% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.91% | 4.48% | -0.57% |
Volatility
WBIIX vs. FAOSX - Volatility Comparison
William Blair Institutional International Growth Fund (WBIIX) has a higher volatility of 5.84% compared to Fidelity Advisor Overseas Fund Class Z (FAOSX) at 0.00%. This indicates that WBIIX's price experiences larger fluctuations and is considered to be riskier than FAOSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| WBIIX | FAOSX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.84% | 0.00% | +5.84% |
Volatility (6M)Calculated over the trailing 6-month period | 15.72% | 0.00% | +15.72% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.71% | 7.68% | +10.03% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.14% | 16.65% | +0.49% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 17.18% | 16.56% | +0.62% |
WBIIX vs. FAOSX - Expense Ratio Comparison
WBIIX has a 0.98% expense ratio, which is lower than FAOSX's 1.02% expense ratio.
Dividends
WBIIX vs. FAOSX - Dividend Comparison
WBIIX's dividend yield for the trailing twelve months is around 11.33%, more than FAOSX's 8.67% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FAOSX Fidelity Advisor Overseas Fund Class Z | 8.67% | 8.67% | 1.80% | 1.12% | 0.85% | 2.07% | 0.00% | 1.70% | 5.30% | 3.93% | 0.00% | 0.00% |
WBIIX William Blair Institutional International Growth Fund | 11.33% | 12.53% | 7.49% | 2.51% | 6.57% | 16.58% | 12.61% | 0.95% | 11.74% | 4.16% | 1.15% | 1.28% |
Frequently Asked Questions
WBIIX and FAOSX have a correlation of 0.37, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
WBIIX has higher volatility (5.84%) compared to FAOSX (0.00%). In terms of maximum drawdown, WBIIX dropped -65.13% vs FAOSX's -36.24%.
WBIIX currently has the higher Sharpe Ratio (1.02 vs -0.30), 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.
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