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Performance
Performance Chart
The chart shows the growth of an initial investment of $10,000 in William Blair International Small Cap Growth Fund, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.
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Returns By Period
William Blair International Small Cap Growth Fund (WISIX) has returned -3.63% so far this year and 9.96% over the past 12 months. Over the last ten years, WISIX has returned 4.74% per year, falling short of the S&P 500 Index benchmark, which averaged 12.16% annually.
William Blair International Small Cap Growth Fund
- 1D
- -1.60%
- 1M
- -10.09%
- YTD
- -3.63%
- 6M
- -5.31%
- 1Y
- 9.96%
- 3Y*
- 6.21%
- 5Y*
- -1.02%
- 10Y*
- 4.74%
Benchmark (S&P 500 Index)
- 1D
- 2.91%
- 1M
- -5.09%
- YTD
- -4.63%
- 6M
- -2.39%
- 1Y
- 16.33%
- 3Y*
- 16.69%
- 5Y*
- 10.18%
- 10Y*
- 12.16%
Monthly Returns
Based on dividend-adjusted daily data since Nov 2, 2005, WISIX's average daily return is +0.03%, while the average monthly return is +0.62%. At this rate, your investment would double in approximately 9.3 years.
Historically, 60% of months were positive and 40% were negative. The best month was May 2009 with a return of +15.0%, while the worst month was Oct 2008 at -28.3%. The longest winning streak lasted 11 consecutive months, and the longest losing streak was 6 months.
On a daily basis, WISIX closed higher 52% of trading days. The best single day was Oct 13, 2008 with a return of +8.5%, while the worst single day was Mar 16, 2020 at -11.0%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2.28% | 4.80% | -10.09% | -3.63% | |||||||||
| 2025 | 3.34% | -0.95% | -1.27% | 7.02% | 5.88% | 3.27% | -2.48% | 1.55% | 0.21% | -2.29% | -0.50% | 1.06% | 15.31% |
| 2024 | -3.63% | 2.35% | 0.33% | -4.24% | 3.07% | 0.25% | 3.63% | 3.34% | 1.08% | -5.10% | 1.85% | -1.58% | 0.80% |
| 2023 | 6.97% | -2.14% | 2.45% | 1.63% | -1.52% | 1.37% | 2.02% | -4.55% | -5.19% | -6.76% | 13.52% | 7.89% | 14.72% |
| 2022 | -15.36% | -6.26% | 0.00% | -10.73% | -1.85% | -12.07% | 10.71% | -5.72% | -10.82% | 6.17% | 11.72% | -3.69% | -34.99% |
| 2021 | -1.30% | 0.06% | -1.15% | 7.31% | 0.97% | 1.55% | 3.27% | 5.46% | -4.89% | 3.31% | -4.78% | 1.42% | 11.01% |
Benchmark Metrics
William Blair International Small Cap Growth Fund has an annualized alpha of -0.15%, beta of 0.74, and R² of 0.60 versus S&P 500 Index. Calculated based on daily prices since November 03, 2005.
- This fund participated in 103.87% of S&P 500 Index downside but only 91.52% of its upside — more exposed to losses than it benefited from rallies.
- Alpha
- -0.15%
- Beta
- 0.74
- R²
- 0.60
- Upside Capture
- 91.52%
- Downside Capture
- 103.87%
Expense Ratio
WISIX has a high expense ratio of 1.23%, indicating above-average management fees.
Return for Risk
Risk / Return Rank
WISIX ranks 19 for risk / return — in the bottom 19% of mutual funds on our site. This means you're taking on significantly more risk than the returns justify. Consider whether the potential upside is worth the volatility, or explore alternatives with better risk / return profiles.
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for William Blair International Small Cap Growth Fund (WISIX) and compare them to a chosen benchmark (S&P 500 Index).
| WISIX | Benchmark | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.56 | 0.90 | -0.33 |
Sortino ratioReturn per unit of downside risk | 0.83 | 1.39 | -0.56 |
Omega ratioGain probability vs. loss probability | 1.12 | 1.21 | -0.09 |
Calmar ratioReturn relative to maximum drawdown | 0.66 | 1.40 | -0.74 |
Martin ratioReturn relative to average drawdown | 2.01 | 6.61 | -4.60 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Explore WISIX risk-adjusted metrics in detail
Dive deeper into individual metrics with historical trends, benchmark comparisons, and performance across different time periods.
Dividends
Dividend History
William Blair International Small Cap Growth Fund provided a 0.63% dividend yield over the last twelve months, with an annual payout of $0.09 per share.
| Period | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dividend | $0.09 | $0.09 | $0.22 | $0.11 | $0.02 | $2.72 | $0.37 | $0.04 | $1.45 | $1.56 | $0.05 | $0.32 |
Dividend yield | 0.63% | 0.61% | 1.78% | 0.88% | 0.21% | 16.20% | 2.09% | 0.31% | 13.84% | 9.94% | 0.36% | 2.31% |
Monthly Dividends
The table displays the monthly dividend distributions for William Blair International Small Cap Growth Fund. The dividends shown in the table have been adjusted to account for any splits that may have occurred.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | $0.00 | $0.00 | $0.00 | $0.00 | |||||||||
| 2025 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.09 | $0.09 |
| 2024 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.22 | $0.22 |
| 2023 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.11 | $0.11 |
| 2022 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.02 | $0.02 |
| 2021 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 | $2.72 | $2.72 |
Drawdowns
Drawdowns Chart
The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.
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Worst Drawdowns
The table below displays the maximum drawdowns of the William Blair International Small Cap Growth Fund. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.
The maximum drawdown for the William Blair International Small Cap Growth Fund was 64.84%, occurring on Mar 9, 2009. Recovery took 1043 trading sessions.
The current William Blair International Small Cap Growth Fund drawdown is 22.75%.
Depth | Start | To Bottom | Bottom | To Recover | End | Total |
|---|---|---|---|---|---|---|
| -64.84% | Nov 1, 2007 | 339 | Mar 9, 2009 | 1043 | Apr 30, 2013 | 1382 |
| -47.76% | Sep 15, 2021 | 260 | Sep 26, 2022 | — | — | — |
| -38.88% | Jan 29, 2018 | 541 | Mar 23, 2020 | 84 | Jul 22, 2020 | 625 |
| -19.97% | May 10, 2006 | 24 | Jun 13, 2006 | 153 | Jan 23, 2007 | 177 |
| -15.12% | Jul 13, 2007 | 25 | Aug 16, 2007 | 35 | Oct 5, 2007 | 60 |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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