AIOIX vs. WCMSX
AIOIX (American Century International Opportunities Fund) and WCMSX (WCM International Small Cap Growth Fund) are both Foreign Small & Mid Cap Equities funds. Over the past 10 years, AIOIX returned 7.07%/yr vs 11.30%/yr for WCMSX. Their correlation of 0.89 means they have usually moved in the same direction. AIOIX charges 1.48%/yr vs 1.25%/yr for WCMSX.
Performance
AIOIX vs. WCMSX - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, AIOIX achieves a 5.49% return, which is significantly higher than WCMSX's 4.27% return. Over the past 10 years, AIOIX has underperformed WCMSX with an annualized return of 7.07%, while WCMSX has yielded a comparatively higher 11.30% annualized return.
AIOIX
- 1D
- -0.32%
- 1M
- -4.87%
- 6M
- -2.65%
- YTD
- 5.49%
- 1Y
- 15.65%
- 3Y*
- 11.23%
- 5Y*
- 0.67%
- 10Y*
- 7.07%
- ALL TIME*
- 10.18%
WCMSX
- 1D
- 0.16%
- 1M
- -6.10%
- 6M
- -1.32%
- YTD
- 4.27%
- 1Y
- 0.26%
- 3Y*
- 11.03%
- 5Y*
- -1.60%
- 10Y*
- 11.30%
- ALL TIME*
- 11.43%
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 |
AIOIX vs. WCMSX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AIOIX American Century International Opportunities Fund | 5.49% | 29.62% | 1.31% | 8.63% | -30.19% | 5.79% | 31.07% | 28.95% | -22.19% | 45.09% |
WCMSX WCM International Small Cap Growth Fund | 4.27% | 18.14% | 4.33% | 22.26% | -42.12% | 16.65% | 55.36% | 45.02% | -8.94% | 42.35% |
Correlation
The correlation between AIOIX and WCMSX is 0.87, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.87 |
Correlation (3Y) Balances recent behavior with more history. | 0.87 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.90 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.89 |
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016 | 0.89 |
The correlation between AIOIX and WCMSX has been stable across timeframes, ranging from 0.87 to 0.90 - a consistent structural relationship.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
AIOIX vs. WCMSX — Risk / Return Rank
AIOIX
WCMSX
AIOIX vs. WCMSX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century International Opportunities Fund (AIOIX) and WCM International Small Cap Growth Fund (WCMSX). 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.
| AIOIX | WCMSX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.73 | ||
| Sortino ratioReturn per unit of downside risk | +0.98 | ||
| Omega ratioGain probability vs. loss probability | 1.14 | 1.01 | +0.13 |
| Calmar ratioReturn relative to maximum drawdown | 1.11 | -0.02 | +1.13 |
| Martin ratioReturn relative to average drawdown | 3.42 | -0.05 | +3.47 |
Loading charts...
Drawdowns
AIOIX vs. WCMSX - Drawdown Comparison
The maximum AIOIX drawdown since its inception was -66.16%, which is greater than WCMSX's maximum drawdown of -51.60%. Use the drawdown chart below to compare losses from any high point for AIOIX and WCMSX.
Loading charts...
Drawdown Indicators
| AIOIX | WCMSX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -66.16% | -51.60% | -14.56% |
Max Drawdown (1Y)Largest decline over 1 year | -14.00% | -14.39% | +0.39% |
Max Drawdown (3Y)Largest decline over 3 years | -17.09% | -18.77% | +1.68% |
Max Drawdown (5Y)Largest decline over 5 years | -41.19% | -51.60% | +10.41% |
Max Drawdown (10Y)Largest decline over 10 years | -41.19% | -51.60% | +10.41% |
Current DrawdownCurrent decline from peak | -10.66% | -15.66% | +5.00% |
Average DrawdownAverage peak-to-trough decline | -15.96% | -15.71% | -0.25% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 4.55% | 4.94% | -0.39% |
Volatility
AIOIX vs. WCMSX - Volatility Comparison
American Century International Opportunities Fund (AIOIX) has a higher volatility of 7.94% compared to WCM International Small Cap Growth Fund (WCMSX) at 7.40%. This indicates that AIOIX's price experiences larger fluctuations and is considered to be riskier than WCMSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| AIOIX | WCMSX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 7.94% | 7.40% | +0.54% |
Volatility (6M)Calculated over the trailing 6-month period | 19.30% | 17.64% | +1.66% |
Volatility (1Y)Calculated over the trailing 1-year period | 21.79% | 20.04% | +1.75% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 19.49% | 21.33% | -1.84% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.03% | 20.16% | -1.13% |
AIOIX vs. WCMSX - Expense Ratio Comparison
AIOIX has a 1.48% expense ratio, which is higher than WCMSX's 1.25% expense ratio.
Dividends
AIOIX vs. WCMSX - Dividend Comparison
AIOIX's dividend yield for the trailing twelve months is around 0.26%, less than WCMSX's 0.78% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AIOIX American Century International Opportunities Fund | 0.26% | 0.27% | 0.32% | 0.23% | 0.00% | 17.80% | 3.18% | 0.92% | 5.28% | 9.09% | 0.04% | 7.15% |
WCMSX WCM International Small Cap Growth Fund | 0.78% | 0.81% | 1.31% | 0.00% | 0.00% | 10.27% | 2.73% | 0.57% | 4.04% | 1.10% | 0.00% | 0.00% |
Frequently Asked Questions
AIOIX and WCMSX have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
AIOIX has higher volatility (7.94%) compared to WCMSX (7.40%). In terms of maximum drawdown, AIOIX dropped -66.16% vs WCMSX's -51.60%.
AIOIX currently has the higher Sharpe Ratio (0.72 vs -0.01), 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.
Find the right allocation for AIOIX and WCMSX
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer