BUFOX vs. BUFMX
BUFOX (Buffalo Early Stage Growth Fund) and BUFMX (Buffalo Mid Cap Fund) are both mutual funds - BUFOX is a Small Cap Growth Equities fund managed by Buffalo, while BUFMX is a Mid Cap Growth Equities fund managed by Buffalo. Over the past 10 years, BUFOX returned 10.18%/yr vs 7.41%/yr for BUFMX. Their correlation of 0.86 means they have usually moved in the same direction. BUFOX charges 1.46%/yr vs 1.02%/yr for BUFMX.
Performance
BUFOX vs. BUFMX - Performance Comparison
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Returns By Period
In the year-to-date period, BUFOX achieves a 12.18% return, which is significantly higher than BUFMX's -6.12% return. Over the past 10 years, BUFOX has outperformed BUFMX with an annualized return of 10.18%, while BUFMX has yielded a comparatively lower 7.41% annualized return.
BUFOX
- 1D
- 1.84%
- 1M
- -5.15%
- 6M
- 9.23%
- YTD
- 12.18%
- 1Y
- 18.95%
- 3Y*
- 5.50%
- 5Y*
- -2.22%
- 10Y*
- 10.18%
- ALL TIME*
- 8.28%
BUFMX
- 1D
- 2.86%
- 1M
- -4.21%
- 6M
- -4.41%
- YTD
- -6.12%
- 1Y
- -11.44%
- 3Y*
- 1.22%
- 5Y*
- -1.76%
- 10Y*
- 7.41%
- ALL TIME*
- 7.54%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
BUFMX Buffalo Mid Cap Fund | $0.00 | $0.00 | $0.00 |
| $0.00 | $0.00 | $0.00 |
BUFOX vs. BUFMX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BUFOX Buffalo Early Stage Growth Fund | 12.18% | 3.09% | 7.52% | 9.83% | -30.78% | 7.43% | 47.85% | 34.06% | -3.78% | 27.03% |
BUFMX Buffalo Mid Cap Fund | -6.12% | -1.68% | 6.73% | 26.92% | -27.89% | 14.39% | 34.24% | 37.96% | -7.29% | 13.59% |
Correlation
The correlation between BUFOX and BUFMX is 0.80, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.80 |
Correlation (3Y) Balances recent behavior with more history. | 0.83 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.87 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.86 |
Correlation (All Time) Calculated using the full available price history since May 25, 2004 | 0.86 |
The correlation between BUFOX and BUFMX has been stable across timeframes, ranging from 0.80 to 0.87 - a consistent structural relationship.
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Return for Risk
BUFOX vs. BUFMX — Risk / Return Rank
BUFOX
BUFMX
BUFOX vs. BUFMX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Buffalo Early Stage Growth Fund (BUFOX) 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.
| BUFOX | BUFMX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.53 | ||
| Sortino ratioReturn per unit of downside risk | +2.23 | ||
| Omega ratioGain probability vs. loss probability | 1.13 | 0.88 | +0.25 |
| Calmar ratioReturn relative to maximum drawdown | 1.10 | -0.76 | +1.86 |
| Martin ratioReturn relative to average drawdown | 3.17 | -1.52 | +4.68 |
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Drawdowns
BUFOX vs. BUFMX - Drawdown Comparison
The maximum BUFOX drawdown since its inception was -69.71%, which is greater than BUFMX's maximum drawdown of -58.44%. Use the drawdown chart below to compare losses from any high point for BUFOX and BUFMX.
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Drawdown Indicators
| BUFOX | BUFMX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -69.71% | -58.44% | -11.27% |
Max Drawdown (1Y)Largest decline over 1 year | -15.52% | -17.71% | +2.19% |
Max Drawdown (3Y)Largest decline over 3 years | -24.62% | -20.29% | -4.33% |
Max Drawdown (5Y)Largest decline over 5 years | -43.17% | -35.58% | -7.59% |
Max Drawdown (10Y)Largest decline over 10 years | -43.17% | -35.58% | -7.59% |
Current DrawdownCurrent decline from peak | -13.72% | -13.92% | +0.20% |
Average DrawdownAverage peak-to-trough decline | -16.01% | -9.41% | -6.60% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.38% | 9.49% | -4.11% |
Volatility
BUFOX vs. BUFMX - Volatility Comparison
Buffalo Early Stage Growth Fund (BUFOX) has a higher volatility of 6.47% compared to Buffalo Mid Cap Fund (BUFMX) at 5.84%. This indicates that BUFOX's price experiences larger fluctuations and is considered to be riskier than BUFMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BUFOX | BUFMX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.47% | 5.84% | +0.63% |
Volatility (6M)Calculated over the trailing 6-month period | 17.35% | 14.04% | +3.31% |
Volatility (1Y)Calculated over the trailing 1-year period | 23.25% | 16.88% | +6.37% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 23.03% | 20.41% | +2.62% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.43% | 19.78% | +2.65% |
BUFOX vs. BUFMX - Expense Ratio Comparison
BUFOX has a 1.46% expense ratio, which is higher than BUFMX's 1.02% expense ratio.
Dividends
BUFOX vs. BUFMX - Dividend Comparison
BUFOX's dividend yield for the trailing twelve months is around 4.55%, less than BUFMX's 10.98% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BUFMX Buffalo Mid Cap Fund | 10.98% | 10.31% | 6.93% | 5.21% | 5.46% | 11.45% | 6.91% | 8.20% | 4.47% | 25.22% | 8.49% | 13.06% |
BUFOX Buffalo Early Stage Growth Fund | 4.55% | 5.10% | 0.00% | 0.00% | 1.20% | 15.83% | 11.19% | 4.77% | 14.50% | 20.01% | 8.35% | 8.53% |
Frequently Asked Questions
BUFOX and BUFMX have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
BUFOX has higher volatility (6.47%) compared to BUFMX (5.84%). In terms of maximum drawdown, BUFOX dropped -69.71% vs BUFMX's -58.44%.
BUFOX currently has the higher Sharpe Ratio (0.73 vs -0.80), 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.
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