MINIX vs. BUFIX

Last updated Jun 24, 2026

MINIX (MFS International Intrinsic Value Fund Class I) and BUFIX (Buffalo International Fund) are both mutual funds - MINIX is a Large Cap Growth Equities fund managed by MFS, while BUFIX is a Foreign Large Cap Equities fund managed by Buffalo. Over the past 10 years, MINIX returned 10.68%/yr vs 11.18%/yr for BUFIX. Their correlation of 0.90 suggests significant overlap in exposure. MINIX charges 0.72%/yr vs 1.03%/yr for BUFIX.

Performance

MINIX vs. BUFIX - Performance Comparison

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

Returns By Period

In the year-to-date period, MINIX achieves a 6.23% return, which is significantly lower than BUFIX's 21.21% return. Both investments have delivered pretty close results over the past 10 years, with MINIX having a 10.68% annualized return and BUFIX not far ahead at 11.18%.

MINIX

• 1D: 0.10%
• 1M: 0.30%
• YTD: 6.23%
• 6M: 5.59%
• 1Y: 21.23%
• 3Y*: 17.50%
• 5Y*: 7.76%
• 10Y*: 10.68%

BUFIX

• 1D: 0.42%
• 1M: 7.30%
• YTD: 21.21%
• 6M: 21.62%
• 1Y: 24.99%
• 3Y*: 13.15%
• 5Y*: 6.59%
• 10Y*: 11.18%

*Multi-year figures are annualized to reflect compound growth (CAGR)

MINIX vs. BUFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MINIX MFS International Intrinsic Value Fund Class I	6.23%	33.06%	7.35%	18.04%	-23.05%	10.55%	20.45%	25.90%	-9.02%	27.14%
BUFIX Buffalo International Fund	21.21%	17.09%	-1.90%	18.33%	-21.80%	18.20%	19.10%	28.01%	-8.85%	29.33%

Correlation

The correlation between MINIX and BUFIX is 0.82, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.90
Correlation (10Y) Calculated over the trailing 10-year period	0.91
Correlation (All Time) Calculated using the full available price history since Oct 1, 2007	0.90

The correlation between MINIX and BUFIX has been stable across timeframes, ranging from 0.82 to 0.91 - a consistent structural relationship.

Return for Risk

MINIX vs. BUFIX — Risk / Return Rank

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

MINIX

MINIX Risk / Return Rank: 28
MINIX Sharpe Ratio Rank: 31
MINIX Sortino Ratio Rank: 29
MINIX Omega Ratio Rank: 29
MINIX Calmar Ratio Rank: 25
MINIX Martin Ratio Rank: 28

BUFIX

BUFIX Risk / Return Rank: 30
BUFIX Sharpe Ratio Rank: 28
BUFIX Sortino Ratio Rank: 25
BUFIX Omega Ratio Rank: 29
BUFIX Calmar Ratio Rank: 33
BUFIX Martin Ratio Rank: 33

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

MINIX vs. BUFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS International Intrinsic Value Fund Class I (MINIX) 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.

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.

	MINIX	BUFIX	Difference
Sharpe ratio: Return per unit of total volatility	1.49	1.39	+0.10
Sortino ratio: Return per unit of downside risk	2.10	1.94	+0.16
Omega ratio: Gain probability vs. loss probability	1.27	1.26	0.00
Calmar ratio: Return relative to maximum drawdown	1.73	2.03	-0.30
Martin ratio: Return relative to average drawdown	6.04	7.02	-0.98

MINIX vs. BUFIX - Sharpe Ratio Comparison

The current MINIX Sharpe Ratio is 1.49, which is comparable to the BUFIX Sharpe Ratio of 1.39. The chart below compares the historical Sharpe Ratios of MINIX and BUFIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MINIX vs. BUFIX - Drawdown Comparison

The maximum MINIX drawdown since its inception was -51.72%, smaller than the maximum BUFIX drawdown of -55.09%. Use the drawdown chart below to compare losses from any high point for MINIX and BUFIX.

Drawdown Indicators

	MINIX	BUFIX	Difference
Max Drawdown Largest peak-to-trough decline	-51.72%	-55.09%	+3.37%
Max Drawdown (1Y) Largest decline over 1 year	-12.42%	-12.85%	+0.43%
Max Drawdown (3Y) Largest decline over 3 years	-13.59%	-15.52%	+1.93%
Max Drawdown (5Y) Largest decline over 5 years	-36.78%	-34.93%	-1.85%
Max Drawdown (10Y) Largest decline over 10 years	-36.78%	-34.93%	-1.85%
Current Drawdown Current decline from peak	-3.24%	0.00%	-3.24%
Average Drawdown Average peak-to-trough decline	-8.60%	-9.15%	+0.55%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.55%	3.71%	-0.16%

Volatility

MINIX vs. BUFIX - Volatility Comparison

The current volatility for MFS International Intrinsic Value Fund Class I (MINIX) is 5.03%, while Buffalo International Fund (BUFIX) has a volatility of 8.83%. This indicates that MINIX 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.

Volatility by Period

	MINIX	BUFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.03%	8.83%	-3.80%
Volatility (6M) Calculated over the trailing 6-month period	11.79%	16.71%	-4.92%
Volatility (1Y) Calculated over the trailing 1-year period	14.41%	18.84%	-4.43%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.73%	17.91%	-1.18%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.63%	17.66%	-2.03%

MINIX vs. BUFIX - Expense Ratio Comparison

MINIX has a 0.72% expense ratio, which is lower than BUFIX's 1.03% expense ratio.

Dividends

MINIX vs. BUFIX - Dividend Comparison

MINIX's dividend yield for the trailing twelve months is around 7.31%, more than BUFIX's 0.70% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUFIX Buffalo International Fund	0.70%	0.85%	0.84%	0.59%	1.85%	1.20%	0.28%	0.57%	2.42%	0.36%	0.00%	0.51%
MINIX MFS International Intrinsic Value Fund Class I	7.31%	7.77%	12.02%	11.21%	13.90%	7.25%	5.25%	3.94%	4.49%	2.62%	1.82%	3.20%

Frequently Asked Questions

Can I hold both MINIX and BUFIX in my portfolio?

MINIX and BUFIX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MINIX or BUFIX?

BUFIX has higher volatility (8.83%) compared to MINIX (5.03%). In terms of maximum drawdown, MINIX dropped -51.72% vs BUFIX's -55.09%.

Which has better risk-adjusted returns?

MINIX currently has the higher Sharpe Ratio (1.49 vs 1.39), 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.