FMIMX vs. BUFTX
FMIMX (FMI Common Stock Fund) and BUFTX (Buffalo Discovery Fund) are both mutual funds - FMIMX is a Mid Cap Blend Equities fund managed by FMI, while BUFTX is a Mid Cap Growth Equities fund managed by Buffalo. Over the past 10 years, FMIMX returned 11.95%/yr vs 6.99%/yr for BUFTX. Their 0.80 correlation means they have sometimes moved together and sometimes differently. FMIMX charges 1.01%/yr vs 1.00%/yr for BUFTX.
Performance
FMIMX vs. BUFTX - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, FMIMX achieves a 18.51% return, which is significantly higher than BUFTX's -5.48% return. Over the past 10 years, FMIMX has outperformed BUFTX with an annualized return of 11.95%, while BUFTX has yielded a comparatively lower 6.99% annualized return.
FMIMX
- 1D
- -0.78%
- 1M
- 2.67%
- 6M
- 11.88%
- YTD
- 18.51%
- 1Y
- 17.90%
- 3Y*
- 12.77%
- 5Y*
- 10.68%
- 10Y*
- 11.95%
- ALL TIME*
- 9.43%
BUFTX
- 1D
- 2.96%
- 1M
- -3.48%
- 6M
- -4.52%
- YTD
- -5.48%
- 1Y
- -9.52%
- 3Y*
- 1.06%
- 5Y*
- -2.66%
- 10Y*
- 6.99%
- ALL TIME*
- 7.97%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
FMIMX vs. BUFTX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
FMIMX FMI Common Stock Fund | 18.51% | 2.12% | 10.38% | 24.85% | -5.95% | 30.52% | 5.79% | 24.80% | -8.77% | 13.92% |
BUFTX Buffalo Discovery Fund | -5.48% | -1.83% | 5.31% | 24.30% | -28.78% | 11.55% | 33.90% | 31.62% | -6.52% | 25.43% |
Correlation
The correlation between FMIMX and BUFTX is 0.60, 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. | 0.60 |
Correlation (3Y) Balances recent behavior with more history. | 0.73 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.78 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.73 |
Correlation (All Time) Calculated using the full available price history since Apr 16, 2001 | 0.80 |
Over the past year, the correlation between FMIMX and BUFTX has dropped to 0.60 - well below their long-term average of 0.80, suggesting their price drivers have been diverging.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
FMIMX vs. BUFTX — Risk / Return Rank
FMIMX
BUFTX
FMIMX vs. BUFTX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for FMI Common Stock Fund (FMIMX) and Buffalo Discovery Fund (BUFTX). 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.
| FMIMX | BUFTX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.57 | ||
| Sortino ratioReturn per unit of downside risk | +2.34 | ||
| Omega ratioGain probability vs. loss probability | 1.16 | 0.90 | +0.26 |
| Calmar ratioReturn relative to maximum drawdown | 1.09 | -0.67 | +1.76 |
| Martin ratioReturn relative to average drawdown | 2.71 | -1.46 | +4.17 |
Loading charts...
Drawdowns
FMIMX vs. BUFTX - Drawdown Comparison
The maximum FMIMX drawdown since its inception was -59.09%, roughly equal to the maximum BUFTX drawdown of -60.45%. Use the drawdown chart below to compare losses from any high point for FMIMX and BUFTX.
Loading charts...
Drawdown Indicators
| FMIMX | BUFTX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -59.09% | -60.45% | +1.36% |
Max Drawdown (1Y)Largest decline over 1 year | -13.80% | -18.16% | +4.36% |
Max Drawdown (3Y)Largest decline over 3 years | -21.31% | -22.10% | +0.79% |
Max Drawdown (5Y)Largest decline over 5 years | -21.31% | -36.36% | +15.05% |
Max Drawdown (10Y)Largest decline over 10 years | -38.07% | -36.36% | -1.71% |
Current DrawdownCurrent decline from peak | -0.78% | -16.18% | +15.40% |
Average DrawdownAverage peak-to-trough decline | -10.42% | -11.34% | +0.92% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.56% | 9.11% | -3.55% |
Volatility
FMIMX vs. BUFTX - Volatility Comparison
The current volatility for FMI Common Stock Fund (FMIMX) is 5.12%, while Buffalo Discovery Fund (BUFTX) has a volatility of 5.67%. This indicates that FMIMX experiences smaller price fluctuations and is considered to be less risky than BUFTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| FMIMX | BUFTX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.12% | 5.67% | -0.55% |
Volatility (6M)Calculated over the trailing 6-month period | 12.67% | 13.61% | -0.94% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.58% | 16.87% | +0.71% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.65% | 21.30% | -2.65% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.23% | 20.45% | -1.22% |
FMIMX vs. BUFTX - Expense Ratio Comparison
FMIMX has a 1.01% expense ratio, which is higher than BUFTX's 1.00% expense ratio.
Dividends
FMIMX vs. BUFTX - Dividend Comparison
FMIMX's dividend yield for the trailing twelve months is around 11.17%, less than BUFTX's 22.37% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BUFTX Buffalo Discovery Fund | 22.37% | 21.15% | 10.00% | 0.00% | 7.08% | 15.11% | 7.98% | 14.81% | 7.01% | 4.64% | 0.00% | 7.56% |
FMIMX FMI Common Stock Fund | 11.17% | 13.24% | 2.01% | 2.84% | 6.65% | 12.44% | 0.76% | 4.93% | 10.17% | 11.82% | 4.92% | 10.77% |
Frequently Asked Questions
FMIMX and BUFTX have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
BUFTX has higher volatility (5.67%) compared to FMIMX (5.12%). In terms of maximum drawdown, FMIMX dropped -59.09% vs BUFTX's -60.45%.
FMIMX currently has the higher Sharpe Ratio (0.86 vs -0.72), 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.
Find the right allocation for FMIMX and BUFTX
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer