MECIX vs. AIOIX
MECIX (AMG GW&K International Small Cap Fund) and AIOIX (American Century International Opportunities Fund) are both Foreign Small & Mid Cap Equities funds. Over the past 10 years, MECIX returned 4.69%/yr vs 7.07%/yr for AIOIX. Their 0.62 correlation means they have sometimes moved together and sometimes differently. MECIX charges 0.99%/yr vs 1.48%/yr for AIOIX.
Performance
MECIX vs. AIOIX - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, MECIX achieves a 7.29% return, which is significantly higher than AIOIX's 5.83% return. Over the past 10 years, MECIX has underperformed AIOIX with an annualized return of 4.69%, while AIOIX has yielded a comparatively higher 7.07% annualized return.
MECIX
- 1D
- 2.23%
- 1M
- 0.58%
- 6M
- 3.95%
- YTD
- 7.29%
- 1Y
- 8.32%
- 3Y*
- 8.12%
- 5Y*
- 1.07%
- 10Y*
- 4.69%
- ALL TIME*
- 8.87%
AIOIX
- 1D
- 3.73%
- 1M
- -4.57%
- 6M
- -1.73%
- YTD
- 5.83%
- 1Y
- 16.02%
- 3Y*
- 10.94%
- 5Y*
- 0.73%
- 10Y*
- 7.07%
- ALL TIME*
- 10.20%
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 |
MECIX vs. AIOIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MECIX AMG GW&K International Small Cap Fund | 7.29% | 16.57% | 2.15% | 6.23% | -20.34% | 2.33% | 1.72% | 9.90% | -6.00% | 22.41% |
AIOIX American Century International Opportunities Fund | 5.83% | 29.62% | 1.31% | 8.63% | -30.19% | 5.79% | 31.07% | 28.95% | -22.19% | 45.09% |
Correlation
The correlation between MECIX and AIOIX is 0.79, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.79 |
Correlation (3Y) Balances recent behavior with more history. | 0.81 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.85 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.74 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2002 | 0.62 |
The correlation between MECIX and AIOIX shifts across timeframes, from 0.62 (all time) to 0.85 (5 years), reflecting how their relationship changes across market environments.
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
MECIX vs. AIOIX — Risk / Return Rank
MECIX
AIOIX
MECIX vs. AIOIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for AMG GW&K International Small Cap Fund (MECIX) and American Century International Opportunities Fund (AIOIX). 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.
| MECIX | AIOIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.10 | ||
| Sortino ratioReturn per unit of downside risk | -0.16 | ||
| Omega ratioGain probability vs. loss probability | 1.12 | 1.14 | -0.02 |
| Calmar ratioReturn relative to maximum drawdown | 0.84 | 1.15 | -0.31 |
| Martin ratioReturn relative to average drawdown | 2.59 | 3.57 | -0.98 |
Loading charts...
Drawdowns
MECIX vs. AIOIX - Drawdown Comparison
The maximum MECIX drawdown since its inception was -68.42%, roughly equal to the maximum AIOIX drawdown of -66.16%. Use the drawdown chart below to compare losses from any high point for MECIX and AIOIX.
Loading charts...
Drawdown Indicators
| MECIX | AIOIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -68.42% | -66.16% | -2.26% |
Max Drawdown (1Y)Largest decline over 1 year | -10.60% | -14.00% | +3.40% |
Max Drawdown (3Y)Largest decline over 3 years | -17.72% | -17.09% | -0.63% |
Max Drawdown (5Y)Largest decline over 5 years | -37.38% | -41.19% | +3.81% |
Max Drawdown (10Y)Largest decline over 10 years | -51.20% | -41.19% | -10.01% |
Current DrawdownCurrent decline from peak | -2.85% | -10.37% | +7.52% |
Average DrawdownAverage peak-to-trough decline | -14.16% | -15.96% | +1.80% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.41% | 4.50% | -1.09% |
Volatility
MECIX vs. AIOIX - Volatility Comparison
The current volatility for AMG GW&K International Small Cap Fund (MECIX) is 4.17%, while American Century International Opportunities Fund (AIOIX) has a volatility of 8.01%. This indicates that MECIX experiences smaller price fluctuations and is considered to be less risky than AIOIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| MECIX | AIOIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.17% | 8.01% | -3.84% |
Volatility (6M)Calculated over the trailing 6-month period | 10.76% | 19.30% | -8.54% |
Volatility (1Y)Calculated over the trailing 1-year period | 13.99% | 21.80% | -7.81% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 14.91% | 19.49% | -4.58% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.23% | 19.03% | +0.20% |
MECIX vs. AIOIX - Expense Ratio Comparison
MECIX has a 0.99% expense ratio, which is lower than AIOIX's 1.48% expense ratio.
Dividends
MECIX vs. AIOIX - Dividend Comparison
MECIX has not paid dividends to shareholders, while AIOIX's dividend yield for the trailing twelve months is around 0.26%.
| 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% |
MECIX AMG GW&K International Small Cap Fund | 0.00% | 0.00% | 2.06% | 1.51% | 1.34% | 0.68% | 0.00% | 0.02% | 9.02% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
MECIX and AIOIX have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
AIOIX has higher volatility (8.01%) compared to MECIX (4.17%). In terms of maximum drawdown, MECIX dropped -68.42% vs AIOIX's -66.16%.
AIOIX currently has the higher Sharpe Ratio (0.74 vs 0.63), 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 MECIX and AIOIX
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