AIOIX vs. MWNIX
Compare and contrast key facts about American Century International Opportunities Fund (AIOIX) and MFS International New Discovery Fund (MWNIX).
AIOIX is managed by American Century. It was launched on May 31, 2001. MWNIX is managed by MFS. It was launched on Oct 8, 1997.
Performance
AIOIX vs. MWNIX - Performance Comparison
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AIOIX vs. MWNIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AIOIX American Century International Opportunities Fund | -0.42% | 29.62% | 1.31% | 8.63% | -30.19% | 5.79% | 31.07% | 28.95% | -22.19% | 45.09% |
MWNIX MFS International New Discovery Fund | -4.10% | 16.88% | 0.90% | 13.03% | -18.63% | 5.06% | 9.98% | 22.85% | -10.41% | 30.67% |
Returns By Period
In the year-to-date period, AIOIX achieves a -0.42% return, which is significantly higher than MWNIX's -4.10% return. Over the past 10 years, AIOIX has outperformed MWNIX with an annualized return of 6.96%, while MWNIX has yielded a comparatively lower 5.54% annualized return.
AIOIX
- 1D
- -0.92%
- 1M
- -13.82%
- YTD
- -0.42%
- 6M
- 1.74%
- 1Y
- 31.07%
- 3Y*
- 9.88%
- 5Y*
- 0.98%
- 10Y*
- 6.96%
MWNIX
- 1D
- -0.25%
- 1M
- -11.78%
- YTD
- -4.10%
- 6M
- -4.89%
- 1Y
- 9.37%
- 3Y*
- 6.45%
- 5Y*
- 1.70%
- 10Y*
- 5.54%
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AIOIX vs. MWNIX - Expense Ratio Comparison
AIOIX has a 1.48% expense ratio, which is higher than MWNIX's 1.03% expense ratio.
Return for Risk
AIOIX vs. MWNIX — Risk / Return Rank
AIOIX
MWNIX
AIOIX vs. MWNIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century International Opportunities Fund (AIOIX) and MFS International New Discovery Fund (MWNIX). 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.
| AIOIX | MWNIX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.56 | 0.68 | +0.88 |
Sortino ratioReturn per unit of downside risk | 2.08 | 0.93 | +1.14 |
Omega ratioGain probability vs. loss probability | 1.30 | 1.13 | +0.16 |
Calmar ratioReturn relative to maximum drawdown | 2.00 | 0.63 | +1.37 |
Martin ratioReturn relative to average drawdown | 8.50 | 2.39 | +6.10 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| AIOIX | MWNIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.56 | 0.68 | +0.88 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.05 | 0.13 | -0.08 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.37 | 0.40 | -0.03 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.52 | 0.56 | -0.04 |
Correlation
The correlation between AIOIX and MWNIX is 0.87, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
AIOIX vs. MWNIX - Dividend Comparison
AIOIX's dividend yield for the trailing twelve months is around 0.28%, less than MWNIX's 3.38% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AIOIX American Century International Opportunities Fund | 0.28% | 0.27% | 0.32% | 0.23% | 0.00% | 17.80% | 3.18% | 0.92% | 5.28% | 9.09% | 0.04% | 7.15% |
MWNIX MFS International New Discovery Fund | 3.38% | 3.24% | 7.61% | 4.05% | 5.68% | 5.06% | 3.90% | 2.67% | 6.68% | 1.63% | 1.09% | 1.12% |
Drawdowns
AIOIX vs. MWNIX - Drawdown Comparison
The maximum AIOIX drawdown since its inception was -66.16%, which is greater than MWNIX's maximum drawdown of -58.38%. Use the drawdown chart below to compare losses from any high point for AIOIX and MWNIX.
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Drawdown Indicators
| AIOIX | MWNIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -66.16% | -58.38% | -7.78% |
Max Drawdown (1Y)Largest decline over 1 year | -14.00% | -11.78% | -2.22% |
Max Drawdown (5Y)Largest decline over 5 years | -41.19% | -33.67% | -7.52% |
Max Drawdown (10Y)Largest decline over 10 years | -41.19% | -34.72% | -6.47% |
Current DrawdownCurrent decline from peak | -14.00% | -11.78% | -2.22% |
Average DrawdownAverage peak-to-trough decline | -16.12% | -9.61% | -6.51% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.29% | 3.09% | +0.20% |
Volatility
AIOIX vs. MWNIX - Volatility Comparison
American Century International Opportunities Fund (AIOIX) has a higher volatility of 8.19% compared to MFS International New Discovery Fund (MWNIX) at 5.09%. This indicates that AIOIX's price experiences larger fluctuations and is considered to be riskier than MWNIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| AIOIX | MWNIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 8.19% | 5.09% | +3.10% |
Volatility (6M)Calculated over the trailing 6-month period | 13.95% | 8.21% | +5.74% |
Volatility (1Y)Calculated over the trailing 1-year period | 19.37% | 12.11% | +7.26% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.59% | 13.02% | +5.57% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.70% | 13.90% | +4.80% |