BUFEX vs. BUFMX

Last updated Jul 17, 2026

BUFEX (Buffalo Large Cap Fund) and BUFMX (Buffalo Mid Cap Fund) are both mutual funds - BUFEX is a Large Cap Growth Equities fund managed by Buffalo, while BUFMX is a Mid Cap Growth Equities fund managed by Buffalo. Over the past 10 years, BUFEX returned 15.63%/yr vs 7.92%/yr for BUFMX. Their correlation of 0.88 suggests significant overlap in exposure. BUFEX charges 0.93%/yr vs 1.02%/yr for BUFMX.

Performance

BUFEX vs. BUFMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Buffalo Large Cap Fund (BUFEX) and Buffalo Mid Cap Fund (BUFMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BUFEX achieves a 8.55% return, which is significantly higher than BUFMX's -3.23% return. Over the past 10 years, BUFEX has outperformed BUFMX with an annualized return of 15.63%, while BUFMX has yielded a comparatively lower 7.92% annualized return.

BUFEX

• 1D: 0.52%
• 1M: 1.14%
• 6M: 8.77%
• YTD: 8.55%
• 1Y: 17.89%
• 3Y*: 20.79%
• 5Y*: 12.10%
• 10Y*: 15.63%

BUFMX

• 1D: -0.98%
• 1M: -0.98%
• 6M: -5.63%
• YTD: -3.23%
• 1Y: -8.07%
• 3Y*: 2.38%
• 5Y*: -0.55%
• 10Y*: 7.92%

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

BUFEX vs. BUFMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BUFEX Buffalo Large Cap Fund	8.55%	16.27%	28.86%	40.39%	-28.64%	25.55%	28.08%	31.76%	-1.60%	24.86%
BUFMX Buffalo Mid Cap Fund	-3.23%	-1.68%	6.73%	26.92%	-27.89%	14.39%	34.24%	37.96%	-7.29%	13.59%

Correlation

The correlation between BUFEX and BUFMX is 0.63, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.63
Correlation (3Y) Calculated over the trailing 3-year period	0.69
Correlation (5Y) Calculated over the trailing 5-year period	0.80
Correlation (10Y) Calculated over the trailing 10-year period	0.84
Correlation (All Time) Calculated using the full available price history since Dec 14, 2001	0.88

Over the past year, the correlation between BUFEX and BUFMX has dropped to 0.63 - well below their long-term average of 0.88, suggesting their price drivers have been diverging.

Return for Risk

BUFEX vs. BUFMX — Risk / Return Rank

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

BUFEX

BUFEX Risk / Return Rank: 26
BUFEX Sharpe Ratio Rank: 29
BUFEX Sortino Ratio Rank: 27
BUFEX Omega Ratio Rank: 28
BUFEX Calmar Ratio Rank: 21
BUFEX Martin Ratio Rank: 24

BUFMX

BUFMX Risk / Return Rank: 1
BUFMX Sharpe Ratio Rank: 1
BUFMX Sortino Ratio Rank: 1
BUFMX Omega Ratio Rank: 1
BUFMX Calmar Ratio Rank: 1
BUFMX Martin Ratio Rank: 1

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.

BUFEX vs. BUFMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Buffalo Large Cap Fund (BUFEX) and Buffalo Mid Cap Fund (BUFMX). 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.

	BUFEX	BUFMX	Difference
Sharpe ratio: Return per unit of total volatility	1.20	-0.46	+1.66
Sortino ratio: Return per unit of downside risk	1.69	-0.53	+2.23
Omega ratio: Gain probability vs. loss probability	1.22	0.94	+0.28
Calmar ratio: Return relative to maximum drawdown	1.32	-0.41	+1.73
Martin ratio: Return relative to average drawdown	4.45	-0.83	+5.28

BUFEX vs. BUFMX - Sharpe Ratio Comparison

The current BUFEX Sharpe Ratio is 1.20, which is higher than the BUFMX Sharpe Ratio of -0.46. The chart below compares the historical Sharpe Ratios of BUFEX and BUFMX, 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

BUFEX vs. BUFMX - Drawdown Comparison

The maximum BUFEX drawdown since its inception was -54.12%, smaller than the maximum BUFMX drawdown of -58.44%. Use the drawdown chart below to compare losses from any high point for BUFEX and BUFMX.

Drawdown Indicators

	BUFEX	BUFMX	Difference
Max Drawdown Largest peak-to-trough decline	-54.12%	-58.44%	+4.32%
Max Drawdown (1Y) Largest decline over 1 year	-13.76%	-18.37%	+4.61%
Max Drawdown (3Y) Largest decline over 3 years	-21.46%	-20.29%	-1.17%
Max Drawdown (5Y) Largest decline over 5 years	-32.54%	-35.58%	+3.04%
Max Drawdown (10Y) Largest decline over 10 years	-32.54%	-35.58%	+3.04%
Current Drawdown Current decline from peak	-1.71%	-11.27%	+9.56%
Average Drawdown Average peak-to-trough decline	-9.21%	-9.41%	+0.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.06%	9.08%	-5.02%

Volatility

BUFEX vs. BUFMX - Volatility Comparison

The current volatility for Buffalo Large Cap Fund (BUFEX) is 5.03%, while Buffalo Mid Cap Fund (BUFMX) has a volatility of 6.73%. This indicates that BUFEX experiences smaller price fluctuations and is considered to be less risky than BUFMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BUFEX	BUFMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.03%	6.73%	-1.70%
Volatility (6M) Calculated over the trailing 6-month period	12.18%	13.70%	-1.52%
Volatility (1Y) Calculated over the trailing 1-year period	15.06%	16.52%	-1.46%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.92%	20.37%	-0.45%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.51%	19.74%	-0.23%

BUFEX vs. BUFMX - Expense Ratio Comparison

BUFEX has a 0.93% expense ratio, which is lower than BUFMX's 1.02% expense ratio.

Dividends

BUFEX vs. BUFMX - Dividend Comparison

BUFEX's dividend yield for the trailing twelve months is around 6.21%, less than BUFMX's 10.65% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUFEX Buffalo Large Cap Fund	6.21%	6.75%	3.65%	0.03%	3.07%	25.69%	0.14%	1.42%	6.00%	5.33%	0.00%	6.83%
BUFMX Buffalo Mid Cap Fund	10.65%	10.31%	6.93%	5.21%	5.46%	11.45%	6.91%	8.20%	4.47%	25.22%	8.49%	13.06%

Frequently Asked Questions

Can I hold both BUFEX and BUFMX in my portfolio?

BUFEX and BUFMX have a correlation of 0.63, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BUFEX or BUFMX?

BUFMX has higher volatility (6.73%) compared to BUFEX (5.03%). In terms of maximum drawdown, BUFEX dropped -54.12% vs BUFMX's -58.44%.

Which has better risk-adjusted returns?

BUFEX currently has the higher Sharpe Ratio (1.20 vs -0.46), 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.