BUFBX vs. BUFIX

Last updated Jun 5, 2026

BUFBX (Buffalo Flexible Income Fund) and BUFIX (Buffalo International Fund) are both mutual funds - BUFBX is a Large Cap Value Equities fund managed by Buffalo, while BUFIX is a Foreign Large Cap Equities fund managed by Buffalo. Over the past 10 years, BUFBX returned 9.95%/yr vs 10.22%/yr for BUFIX. A 0.69 correlation means they provide meaningful diversification when combined. BUFBX charges 1.01%/yr vs 1.03%/yr for BUFIX.

Performance

BUFBX vs. BUFIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Buffalo Flexible Income Fund (BUFBX) 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, BUFBX achieves a 12.34% return, which is significantly lower than BUFIX's 17.66% return. Both investments have delivered pretty close results over the past 10 years, with BUFBX having a 9.95% annualized return and BUFIX not far ahead at 10.22%.

BUFBX

• 1D: -0.44%
• 1M: 2.54%
• YTD: 12.34%
• 6M: 12.43%
• 1Y: 20.10%
• 3Y*: 13.75%
• 5Y*: 10.99%
• 10Y*: 9.95%

BUFIX

• 1D: -0.28%
• 1M: 7.29%
• YTD: 17.66%
• 6M: 20.25%
• 1Y: 20.19%
• 3Y*: 11.89%
• 5Y*: 5.85%
• 10Y*: 10.22%

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

BUFBX vs. BUFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BUFBX Buffalo Flexible Income Fund	12.34%	10.37%	10.26%	7.42%	3.97%	29.97%	-2.27%	18.76%	-7.01%	13.20%
BUFIX Buffalo International Fund	17.66%	17.09%	-1.90%	18.33%	-21.80%	18.20%	19.10%	28.01%	-8.85%	29.33%

Correlation

The correlation between BUFBX and BUFIX is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.34
Correlation (3Y) Calculated over the trailing 3-year period	0.50
Correlation (5Y) Calculated over the trailing 5-year period	0.58
Correlation (10Y) Calculated over the trailing 10-year period	0.62
Correlation (All Time) Calculated using the full available price history since Oct 2, 2007	0.69

Over the past year, the correlation between BUFBX and BUFIX has dropped to 0.34 - well below their long-term average of 0.69, suggesting their price drivers have been diverging.

Return for Risk

BUFBX vs. BUFIX — Risk / Return Rank

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

BUFBX

BUFBX Risk / Return Rank: 68
BUFBX Sharpe Ratio Rank: 54
BUFBX Sortino Ratio Rank: 55
BUFBX Omega Ratio Rank: 48
BUFBX Calmar Ratio Rank: 97
BUFBX Martin Ratio Rank: 88

BUFIX

BUFIX Risk / Return Rank: 20
BUFIX Sharpe Ratio Rank: 19
BUFIX Sortino Ratio Rank: 18
BUFIX Omega Ratio Rank: 19
BUFIX Calmar Ratio Rank: 21
BUFIX Martin Ratio Rank: 23

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.

BUFBX vs. BUFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Buffalo Flexible Income Fund (BUFBX) 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.

	BUFBX	BUFIX	Difference
Sharpe ratio: Return per unit of total volatility	2.18	1.23	+0.95
Sortino ratio: Return per unit of downside risk	3.11	1.77	+1.33
Omega ratio: Gain probability vs. loss probability	1.38	1.23	+0.15
Calmar ratio: Return relative to maximum drawdown	6.87	1.64	+5.23
Martin ratio: Return relative to average drawdown	16.80	5.71	+11.09
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BUFBX vs. BUFIX - Sharpe Ratio Comparison

The current BUFBX Sharpe Ratio is 2.18, which is higher than the BUFIX Sharpe Ratio of 1.23. The chart below compares the historical Sharpe Ratios of BUFBX 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.

Sharpe Ratios by Period

	BUFBX	BUFIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.18	1.23	+0.95
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.82	0.34	+0.49
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.64	0.59	+0.05
Sharpe Ratio (All Time) Calculated using the full available price history	0.59	0.34	+0.25

Drawdowns

BUFBX vs. BUFIX - Drawdown Comparison

The maximum BUFBX drawdown since its inception was -39.78%, smaller than the maximum BUFIX drawdown of -55.09%. Use the drawdown chart below to compare losses from any high point for BUFBX and BUFIX.

Drawdown Indicators

	BUFBX	BUFIX	Difference
Max Drawdown Largest peak-to-trough decline	-39.78%	-55.09%	+15.31%
Max Drawdown (1Y) Largest decline over 1 year	-2.83%	-12.85%	+10.02%
Max Drawdown (3Y) Largest decline over 3 years	-12.85%	-15.52%	+2.67%
Max Drawdown (5Y) Largest decline over 5 years	-14.67%	-34.93%	+20.26%
Max Drawdown (10Y) Largest decline over 10 years	-35.51%	-34.93%	-0.58%
Current Drawdown Current decline from peak	-0.65%	-0.28%	-0.37%
Average Drawdown Average peak-to-trough decline	-4.72%	-9.17%	+4.45%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.16%	3.68%	-2.52%

Volatility

BUFBX vs. BUFIX - Volatility Comparison

The current volatility for Buffalo Flexible Income Fund (BUFBX) is 3.10%, while Buffalo International Fund (BUFIX) has a volatility of 7.06%. This indicates that BUFBX 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

	BUFBX	BUFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.10%	7.06%	-3.96%
Volatility (6M) Calculated over the trailing 6-month period	6.61%	14.70%	-8.09%
Volatility (1Y) Calculated over the trailing 1-year period	8.93%	17.11%	-8.18%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	13.40%	17.55%	-4.15%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.60%	17.51%	-1.91%

BUFBX vs. BUFIX - Expense Ratio Comparison

BUFBX has a 1.01% expense ratio, which is lower than BUFIX's 1.03% expense ratio.

Dividends

BUFBX vs. BUFIX - Dividend Comparison

BUFBX's dividend yield for the trailing twelve months is around 8.02%, more than BUFIX's 0.72% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUFBX Buffalo Flexible Income Fund	8.02%	9.10%	3.77%	3.48%	4.16%	5.57%	3.33%	2.73%	6.01%	5.49%	2.39%	3.67%
BUFIX Buffalo International Fund	0.72%	0.85%	0.84%	0.59%	1.85%	1.20%	0.28%	0.57%	2.42%	0.36%	0.00%	0.51%

Frequently Asked Questions

Can I hold both BUFBX and BUFIX in my portfolio?

BUFBX and BUFIX 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.

Which is riskier, BUFBX or BUFIX?

BUFIX has higher volatility (7.06%) compared to BUFBX (3.10%). In terms of maximum drawdown, BUFBX dropped -39.78% vs BUFIX's -55.09%.

Which has better risk-adjusted returns?

BUFBX currently has the higher Sharpe Ratio (2.18 vs 1.23), 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.