MIEIX vs. BUFIX
Compare and contrast key facts about MFS International Equity Fund Class R6 (MIEIX) and Buffalo International Fund (BUFIX).
MIEIX is managed by MFS. It was launched on Jan 31, 1996. BUFIX is managed by Buffalo. It was launched on Sep 27, 2007.
Performance
MIEIX vs. BUFIX - Performance Comparison
Loading graphics...
MIEIX vs. BUFIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MIEIX MFS International Equity Fund Class R6 | -6.55% | 23.22% | 4.13% | 19.06% | -14.82% | 15.13% | 11.11% | 28.42% | -10.66% | 28.01% |
BUFIX Buffalo International Fund | -4.81% | 17.09% | -1.90% | 18.33% | -21.80% | 18.20% | 19.10% | 28.01% | -8.85% | 29.33% |
Returns By Period
In the year-to-date period, MIEIX achieves a -6.55% return, which is significantly lower than BUFIX's -4.81% return. Over the past 10 years, MIEIX has outperformed BUFIX with an annualized return of 9.04%, while BUFIX has yielded a comparatively lower 8.16% annualized return.
MIEIX
- 1D
- 0.48%
- 1M
- -10.84%
- YTD
- -6.55%
- 6M
- -3.47%
- 1Y
- 8.02%
- 3Y*
- 9.09%
- 5Y*
- 6.72%
- 10Y*
- 9.04%
BUFIX
- 1D
- 0.09%
- 1M
- -12.77%
- YTD
- -4.81%
- 6M
- -3.94%
- 1Y
- 6.05%
- 3Y*
- 4.77%
- 5Y*
- 3.18%
- 10Y*
- 8.16%
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
MIEIX vs. BUFIX - Expense Ratio Comparison
MIEIX has a 0.68% expense ratio, which is lower than BUFIX's 1.03% expense ratio.
Return for Risk
MIEIX vs. BUFIX — Risk / Return Rank
MIEIX
BUFIX
MIEIX vs. BUFIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS International Equity Fund Class R6 (MIEIX) and Buffalo International Fund (BUFIX). 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.
| MIEIX | BUFIX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.45 | 0.27 | +0.18 |
Sortino ratioReturn per unit of downside risk | 0.68 | 0.49 | +0.19 |
Omega ratioGain probability vs. loss probability | 1.10 | 1.07 | +0.03 |
Calmar ratioReturn relative to maximum drawdown | 0.52 | 0.28 | +0.24 |
Martin ratioReturn relative to average drawdown | 1.93 | 1.01 | +0.92 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Loading graphics...
Sharpe Ratios by Period
| MIEIX | BUFIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.45 | 0.27 | +0.18 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.44 | 0.19 | +0.26 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.57 | 0.47 | +0.10 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.45 | 0.28 | +0.17 |
Correlation
The correlation between MIEIX and BUFIX is 0.92, 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
MIEIX vs. BUFIX - Dividend Comparison
MIEIX's dividend yield for the trailing twelve months is around 2.87%, more than BUFIX's 0.89% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MIEIX MFS International Equity Fund Class R6 | 2.87% | 2.68% | 1.47% | 1.67% | 1.26% | 5.40% | 1.00% | 3.12% | 1.63% | 1.85% | 1.78% | 1.71% |
BUFIX Buffalo International Fund | 0.89% | 0.85% | 0.84% | 0.59% | 1.85% | 1.20% | 0.28% | 0.57% | 2.42% | 0.36% | 0.00% | 0.51% |
Drawdowns
MIEIX vs. BUFIX - Drawdown Comparison
The maximum MIEIX drawdown since its inception was -53.13%, roughly equal to the maximum BUFIX drawdown of -55.09%. Use the drawdown chart below to compare losses from any high point for MIEIX and BUFIX.
Loading graphics...
Drawdown Indicators
| MIEIX | BUFIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -53.13% | -55.09% | +1.96% |
Max Drawdown (1Y)Largest decline over 1 year | -11.26% | -12.85% | +1.59% |
Max Drawdown (5Y)Largest decline over 5 years | -28.07% | -34.93% | +6.86% |
Max Drawdown (10Y)Largest decline over 10 years | -31.35% | -34.93% | +3.58% |
Current DrawdownCurrent decline from peak | -10.84% | -12.77% | +1.93% |
Average DrawdownAverage peak-to-trough decline | -9.01% | -9.24% | +0.23% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.04% | 3.58% | -0.54% |
Volatility
MIEIX vs. BUFIX - Volatility Comparison
The current volatility for MFS International Equity Fund Class R6 (MIEIX) is 6.03%, while Buffalo International Fund (BUFIX) has a volatility of 7.79%. This indicates that MIEIX experiences smaller price fluctuations and is considered to be less risky than BUFIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading graphics...
Volatility by Period
| MIEIX | BUFIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.03% | 7.79% | -1.76% |
Volatility (6M)Calculated over the trailing 6-month period | 9.42% | 12.02% | -2.60% |
Volatility (1Y)Calculated over the trailing 1-year period | 14.88% | 17.87% | -2.99% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 15.24% | 17.16% | -1.92% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 15.90% | 17.28% | -1.38% |