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BUFIX vs. MIEIX
Performance
Risk-Adjusted Performance
Dividends
Drawdowns
Volatility

Correlation

The correlation between BUFIX and MIEIX 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.


-0.50.00.51.0
Correlation: 0.9

Performance

BUFIX vs. MIEIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Buffalo International Fund (BUFIX) and MFS International Equity Fund Class R6 (MIEIX). The values are adjusted to include any dividend payments, if applicable.

-10.00%-5.00%0.00%NovemberDecember2025FebruaryMarchApril
-6.32%
-5.75%
BUFIX
MIEIX

Key characteristics

Sharpe Ratio

BUFIX:

-0.24

MIEIX:

0.06

Sortino Ratio

BUFIX:

-0.23

MIEIX:

0.18

Omega Ratio

BUFIX:

0.97

MIEIX:

1.02

Calmar Ratio

BUFIX:

-0.23

MIEIX:

0.07

Martin Ratio

BUFIX:

-0.76

MIEIX:

0.21

Ulcer Index

BUFIX:

5.35%

MIEIX:

4.33%

Daily Std Dev

BUFIX:

17.01%

MIEIX:

14.87%

Max Drawdown

BUFIX:

-55.11%

MIEIX:

-50.56%

Current Drawdown

BUFIX:

-11.76%

MIEIX:

-9.25%

Returns By Period

In the year-to-date period, BUFIX achieves a 1.99% return, which is significantly higher than MIEIX's 0.68% return. Over the past 10 years, BUFIX has outperformed MIEIX with an annualized return of 6.11%, while MIEIX has yielded a comparatively lower 5.68% annualized return.


BUFIX

YTD

1.99%

1M

-4.50%

6M

-6.77%

1Y

-3.94%

5Y*

8.55%

10Y*

6.11%

MIEIX

YTD

0.68%

1M

-7.25%

6M

-5.90%

1Y

0.95%

5Y*

9.74%

10Y*

5.68%

*Annualized

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BUFIX vs. MIEIX - Expense Ratio Comparison

BUFIX has a 1.03% expense ratio, which is higher than MIEIX's 0.68% expense ratio.


Expense ratio chart for BUFIX: current value is 1.03%, compared with the broader market range of 0.00% to 2.12%.0.50%1.00%1.50%2.00%
BUFIX: 1.03%
Expense ratio chart for MIEIX: current value is 0.68%, compared with the broader market range of 0.00% to 2.12%.0.50%1.00%1.50%2.00%
MIEIX: 0.68%

Risk-Adjusted Performance

BUFIX vs. MIEIX — Risk-Adjusted Performance Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

BUFIX
The Risk-Adjusted Performance Rank of BUFIX is 4040
Overall Rank
The Sharpe Ratio Rank of BUFIX is 4141
Sharpe Ratio Rank
The Sortino Ratio Rank of BUFIX is 4141
Sortino Ratio Rank
The Omega Ratio Rank of BUFIX is 4242
Omega Ratio Rank
The Calmar Ratio Rank of BUFIX is 3434
Calmar Ratio Rank
The Martin Ratio Rank of BUFIX is 4141
Martin Ratio Rank

MIEIX
The Risk-Adjusted Performance Rank of MIEIX is 6868
Overall Rank
The Sharpe Ratio Rank of MIEIX is 6767
Sharpe Ratio Rank
The Sortino Ratio Rank of MIEIX is 6868
Sortino Ratio Rank
The Omega Ratio Rank of MIEIX is 6868
Omega Ratio Rank
The Calmar Ratio Rank of MIEIX is 6969
Calmar Ratio Rank
The Martin Ratio Rank of MIEIX is 6767
Martin Ratio Rank
The risk-adjusted ranks indicate the investment's position relative to the market. A rank closer to 100 signifies top-performing investments, while a rank closer to 0 might suggest underperformance, based on the selected ratio. The values are calculated based on the past 12 months of returns.

BUFIX vs. MIEIX - Risk-Adjusted Performance Comparison

This table presents a comparison of risk-adjusted performance metrics for Buffalo International Fund (BUFIX) 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.


The chart of Sharpe ratio for BUFIX, currently valued at -0.24, compared to the broader market-1.000.001.002.003.00
BUFIX: -0.24
MIEIX: 0.06
The chart of Sortino ratio for BUFIX, currently valued at -0.23, compared to the broader market-2.000.002.004.006.008.00
BUFIX: -0.23
MIEIX: 0.18
The chart of Omega ratio for BUFIX, currently valued at 0.97, compared to the broader market0.501.001.502.002.503.00
BUFIX: 0.97
MIEIX: 1.02
The chart of Calmar ratio for BUFIX, currently valued at -0.23, compared to the broader market0.002.004.006.008.0010.00
BUFIX: -0.23
MIEIX: 0.07
The chart of Martin ratio for BUFIX, currently valued at -0.76, compared to the broader market0.0010.0020.0030.0040.0050.00
BUFIX: -0.76
MIEIX: 0.21

The current BUFIX Sharpe Ratio is -0.24, which is lower than the MIEIX Sharpe Ratio of 0.06. The chart below compares the historical Sharpe Ratios of BUFIX and MIEIX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.


Rolling 12-month Sharpe Ratio-1.00-0.500.000.501.001.502.002.50NovemberDecember2025FebruaryMarchApril
-0.24
0.06
BUFIX
MIEIX

Dividends

BUFIX vs. MIEIX - Dividend Comparison

BUFIX's dividend yield for the trailing twelve months is around 0.83%, less than MIEIX's 1.46% yield.


TTM20242023202220212020201920182017201620152014
BUFIX
Buffalo International Fund
0.83%0.85%0.59%0.46%0.08%0.27%0.57%0.58%0.30%1.04%0.51%0.53%
MIEIX
MFS International Equity Fund Class R6
1.46%1.47%1.67%0.86%2.06%0.79%2.26%1.48%1.85%1.78%1.65%4.89%

Drawdowns

BUFIX vs. MIEIX - Drawdown Comparison

The maximum BUFIX drawdown since its inception was -55.11%, which is greater than MIEIX's maximum drawdown of -50.56%. Use the drawdown chart below to compare losses from any high point for BUFIX and MIEIX. For additional features, visit the drawdowns tool.


-15.00%-10.00%-5.00%0.00%NovemberDecember2025FebruaryMarchApril
-11.76%
-9.25%
BUFIX
MIEIX

Volatility

BUFIX vs. MIEIX - Volatility Comparison

Buffalo International Fund (BUFIX) has a higher volatility of 10.65% compared to MFS International Equity Fund Class R6 (MIEIX) at 8.77%. This indicates that BUFIX's price experiences larger fluctuations and is considered to be riskier than MIEIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.


2.00%4.00%6.00%8.00%10.00%NovemberDecember2025FebruaryMarchApril
10.65%
8.77%
BUFIX
MIEIX