BUFMX vs. BUFGX

Last updated Jul 14, 2026

BUFMX (Buffalo Mid Cap Fund) and BUFGX (Buffalo Growth Fund) are both mutual funds - BUFMX is a Mid Cap Growth Equities fund managed by Buffalo, while BUFGX is a Large Cap Growth Equities fund managed by Buffalo. Over the past 10 years, BUFMX returned 8.04%/yr vs 12.96%/yr for BUFGX. Their correlation of 0.89 suggests significant overlap in exposure. BUFMX charges 1.02%/yr vs 0.92%/yr for BUFGX.

Performance

BUFMX vs. BUFGX - Performance Comparison

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

Returns By Period

In the year-to-date period, BUFMX achieves a -1.99% return, which is significantly lower than BUFGX's 0.08% return. Over the past 10 years, BUFMX has underperformed BUFGX with an annualized return of 8.04%, while BUFGX has yielded a comparatively higher 12.96% annualized return.

BUFMX

• 1D: -0.63%
• 1M: 1.13%
• 6M: -4.42%
• YTD: -1.99%
• 1Y: -7.39%
• 3Y*: 3.24%
• 5Y*: -0.79%
• 10Y*: 8.04%

BUFGX

• 1D: 0.43%
• 1M: 2.49%
• 6M: -1.00%
• YTD: 0.08%
• 1Y: 8.73%
• 3Y*: 15.88%
• 5Y*: 8.18%
• 10Y*: 12.96%

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

BUFMX vs. BUFGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BUFMX Buffalo Mid Cap Fund	-1.99%	-1.68%	6.73%	26.92%	-27.89%	14.39%	34.24%	37.96%	-7.29%	13.59%
BUFGX Buffalo Growth Fund	0.08%	13.95%	25.13%	42.67%	-31.19%	21.52%	28.29%	31.89%	0.69%	22.76%

Correlation

The correlation between BUFMX and BUFGX is 0.65, 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	0.65
Correlation (3Y) Calculated over the trailing 3-year period	0.72
Correlation (5Y) Calculated over the trailing 5-year period	0.83
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Dec 14, 2001	0.89

Over the past year, the correlation between BUFMX and BUFGX has dropped to 0.65 - well below their long-term average of 0.89, suggesting their price drivers have been diverging.

Return for Risk

BUFMX vs. BUFGX — Risk / Return Rank

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

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

BUFGX

BUFGX Risk / Return Rank: 9
BUFGX Sharpe Ratio Rank: 9
BUFGX Sortino Ratio Rank: 9
BUFGX Omega Ratio Rank: 9
BUFGX Calmar Ratio Rank: 8
BUFGX Martin Ratio Rank: 8

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.

BUFMX vs. BUFGX - Risk-Adjusted Trends Comparison

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

	BUFMX	BUFGX	Difference
Sharpe ratio: Return per unit of total volatility	-0.52	0.52	-1.04
Sortino ratio: Return per unit of downside risk	-0.62	0.80	-1.42
Omega ratio: Gain probability vs. loss probability	0.93	1.10	-0.17
Calmar ratio: Return relative to maximum drawdown	-0.47	0.47	-0.93
Martin ratio: Return relative to average drawdown	-0.95	1.50	-2.45

BUFMX vs. BUFGX - Sharpe Ratio Comparison

The current BUFMX Sharpe Ratio is -0.52, which is lower than the BUFGX Sharpe Ratio of 0.52. The chart below compares the historical Sharpe Ratios of BUFMX and BUFGX, 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

BUFMX vs. BUFGX - Drawdown Comparison

The maximum BUFMX drawdown since its inception was -58.44%, which is greater than BUFGX's maximum drawdown of -50.17%. Use the drawdown chart below to compare losses from any high point for BUFMX and BUFGX.

Drawdown Indicators

	BUFMX	BUFGX	Difference
Max Drawdown Largest peak-to-trough decline	-58.44%	-50.17%	-8.27%
Max Drawdown (1Y) Largest decline over 1 year	-18.37%	-17.63%	-0.74%
Max Drawdown (3Y) Largest decline over 3 years	-20.29%	-21.93%	+1.64%
Max Drawdown (5Y) Largest decline over 5 years	-35.58%	-35.68%	+0.10%
Max Drawdown (10Y) Largest decline over 10 years	-35.58%	-35.68%	+0.10%
Current Drawdown Current decline from peak	-10.14%	-2.88%	-7.26%
Average Drawdown Average peak-to-trough decline	-9.41%	-8.96%	-0.45%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.01%	5.49%	+3.52%

Volatility

BUFMX vs. BUFGX - Volatility Comparison

Buffalo Mid Cap Fund (BUFMX) has a higher volatility of 7.35% compared to Buffalo Growth Fund (BUFGX) at 5.49%. This indicates that BUFMX's price experiences larger fluctuations and is considered to be riskier than BUFGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BUFMX	BUFGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.35%	5.49%	+1.86%
Volatility (6M) Calculated over the trailing 6-month period	13.60%	12.95%	+0.65%
Volatility (1Y) Calculated over the trailing 1-year period	16.47%	15.94%	+0.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.35%	21.52%	-1.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.73%	20.73%	-1.00%

BUFMX vs. BUFGX - Expense Ratio Comparison

BUFMX has a 1.02% expense ratio, which is higher than BUFGX's 0.92% expense ratio.

Dividends

BUFMX vs. BUFGX - Dividend Comparison

BUFMX's dividend yield for the trailing twelve months is around 10.52%, more than BUFGX's 6.11% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUFGX Buffalo Growth Fund	6.11%	6.12%	8.55%	5.55%	4.77%	9.90%	4.97%	13.60%	34.64%	20.49%	0.00%	18.46%
BUFMX Buffalo Mid Cap Fund	10.52%	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 BUFMX and BUFGX in my portfolio?

BUFMX and BUFGX have a correlation of 0.65, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BUFMX or BUFGX?

BUFMX has higher volatility (7.35%) compared to BUFGX (5.49%). In terms of maximum drawdown, BUFMX dropped -58.44% vs BUFGX's -50.17%.

Which has better risk-adjusted returns?

BUFGX currently has the higher Sharpe Ratio (0.52 vs -0.52), 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.