MIAIX vs. MIEIX
MIAIX (MFS Inflation-Adjusted Bond Fund) and MIEIX (MFS International Equity Fund Class R6) are both mutual funds - MIAIX is a Inflation-Protected Bonds fund managed by MFS, while MIEIX is a Foreign Large Cap Equities fund managed by MFS. Over the past 10 years, MIAIX returned 1.81%/yr vs 10.24%/yr for MIEIX. Their -0.02 correlation means they have often moved in opposite directions in the past. MIAIX charges 0.49%/yr vs 0.64%/yr for MIEIX.
Performance
MIAIX vs. MIEIX - Performance Comparison
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Returns By Period
In the year-to-date period, MIAIX achieves a 0.12% return, which is significantly lower than MIEIX's 8.67% return. Over the past 10 years, MIAIX has underperformed MIEIX with an annualized return of 1.81%, while MIEIX has yielded a comparatively higher 10.24% annualized return.
MIAIX
- 1D
- 0.00%
- 1M
- -0.56%
- 6M
- -0.32%
- YTD
- 0.12%
- 1Y
- 1.11%
- 3Y*
- 2.92%
- 5Y*
- -0.39%
- 10Y*
- 1.81%
- ALL TIME*
- 2.79%
MIEIX
- 1D
- 2.06%
- 1M
- 3.67%
- 6M
- 7.12%
- YTD
- 8.67%
- 1Y
- 17.91%
- 3Y*
- 12.63%
- 5Y*
- 8.20%
- 10Y*
- 10.24%
- ALL TIME*
- 8.23%
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 |
MIAIX vs. MIEIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MIAIX MFS Inflation-Adjusted Bond Fund | 0.12% | 5.89% | 1.66% | 2.15% | -11.87% | 4.64% | 10.56% | 8.03% | -1.83% | 2.56% |
MIEIX MFS International Equity Fund Class R6 | 8.67% | 23.22% | 4.13% | 19.06% | -14.82% | 15.13% | 11.11% | 28.42% | -10.66% | 28.01% |
Correlation
The correlation between MIAIX and MIEIX is 0.34, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.34 |
Correlation (3Y) Balances recent behavior with more history. | 0.25 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.22 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.12 |
Correlation (All Time) Calculated using the full available price history since Sep 30, 2003 | -0.02 |
The correlation between MIAIX and MIEIX shifts across timeframes, from -0.02 (all time) to 0.34 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
MIAIX vs. MIEIX — Risk / Return Rank
MIAIX
MIEIX
MIAIX vs. MIEIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Inflation-Adjusted Bond Fund (MIAIX) and MFS International Equity Fund Class R6 (MIEIX). 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.
| MIAIX | MIEIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.72 | ||
| Sortino ratioReturn per unit of downside risk | -1.03 | ||
| Omega ratioGain probability vs. loss probability | 1.08 | 1.22 | -0.14 |
| Calmar ratioReturn relative to maximum drawdown | 0.77 | 1.42 | -0.65 |
| Martin ratioReturn relative to average drawdown | 1.93 | 5.14 | -3.21 |
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Drawdowns
MIAIX vs. MIEIX - Drawdown Comparison
The maximum MIAIX drawdown since its inception was -15.99%, smaller than the maximum MIEIX drawdown of -53.13%. Use the drawdown chart below to compare losses from any high point for MIAIX and MIEIX.
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Drawdown Indicators
| MIAIX | MIEIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -15.99% | -53.13% | +37.14% |
Max Drawdown (1Y)Largest decline over 1 year | -2.18% | -11.26% | +9.08% |
Max Drawdown (3Y)Largest decline over 3 years | -4.70% | -13.43% | +8.73% |
Max Drawdown (5Y)Largest decline over 5 years | -15.99% | -28.07% | +12.08% |
Max Drawdown (10Y)Largest decline over 10 years | -15.99% | -31.35% | +15.36% |
Current DrawdownCurrent decline from peak | -3.49% | 0.00% | -3.49% |
Average DrawdownAverage peak-to-trough decline | -4.24% | -8.94% | +4.70% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.86% | 3.11% | -2.25% |
Volatility
MIAIX vs. MIEIX - Volatility Comparison
The current volatility for MFS Inflation-Adjusted Bond Fund (MIAIX) is 0.75%, while MFS International Equity Fund Class R6 (MIEIX) has a volatility of 3.74%. This indicates that MIAIX experiences smaller price fluctuations and is considered to be less risky than MIEIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MIAIX | MIEIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.75% | 3.74% | -2.99% |
Volatility (6M)Calculated over the trailing 6-month period | 2.61% | 10.93% | -8.32% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.51% | 13.32% | -9.81% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.17% | 15.39% | -9.22% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.48% | 15.67% | -10.19% |
MIAIX vs. MIEIX - Expense Ratio Comparison
MIAIX has a 0.49% expense ratio, which is lower than MIEIX's 0.64% expense ratio.
Dividends
MIAIX vs. MIEIX - Dividend Comparison
MIAIX's dividend yield for the trailing twelve months is around 4.43%, more than MIEIX's 2.46% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MIAIX MFS Inflation-Adjusted Bond Fund | 4.43% | 4.10% | 4.10% | 4.00% | 7.96% | 5.10% | 1.45% | 2.18% | 2.85% | 2.14% | 1.82% | 0.67% |
MIEIX MFS International Equity Fund Class R6 | 2.46% | 2.68% | 1.47% | 1.67% | 1.26% | 5.40% | 1.00% | 3.12% | 1.63% | 1.85% | 1.78% | 1.71% |
Frequently Asked Questions
MIAIX and MIEIX have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
MIEIX has higher volatility (3.74%) compared to MIAIX (0.75%). In terms of maximum drawdown, MIAIX dropped -15.99% vs MIEIX's -53.13%.
MIEIX currently has the higher Sharpe Ratio (1.20 vs 0.48), 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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