BUFSX vs. VOO
Compare and contrast key facts about Buffalo Small Cap Fund (BUFSX) and Vanguard S&P 500 ETF (VOO).
BUFSX is managed by Buffalo. It was launched on Apr 14, 1998. VOO is a passively managed fund by Vanguard that tracks the performance of the S&P 500 Index. It was launched on Sep 7, 2010.
Performance
BUFSX vs. VOO - Performance Comparison
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BUFSX vs. VOO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BUFSX Buffalo Small Cap Fund | -7.54% | -0.13% | 5.38% | 5.45% | -30.01% | 4.44% | 66.49% | 40.97% | -5.73% | 26.96% |
VOO Vanguard S&P 500 ETF | -4.42% | 17.82% | 24.98% | 26.32% | -18.17% | 28.79% | 18.32% | 31.37% | -4.50% | 21.77% |
Returns By Period
In the year-to-date period, BUFSX achieves a -7.54% return, which is significantly lower than VOO's -4.42% return. Over the past 10 years, BUFSX has underperformed VOO with an annualized return of 8.96%, while VOO has yielded a comparatively higher 14.05% annualized return.
BUFSX
- 1D
- -1.58%
- 1M
- -11.35%
- YTD
- -7.54%
- 6M
- -7.29%
- 1Y
- 2.46%
- 3Y*
- -1.05%
- 5Y*
- -6.73%
- 10Y*
- 8.96%
VOO
- 1D
- 2.86%
- 1M
- -5.01%
- YTD
- -4.42%
- 6M
- -1.84%
- 1Y
- 17.67%
- 3Y*
- 18.27%
- 5Y*
- 11.75%
- 10Y*
- 14.05%
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BUFSX vs. VOO - Expense Ratio Comparison
BUFSX has a 1.01% expense ratio, which is higher than VOO's 0.03% expense ratio.
Return for Risk
BUFSX vs. VOO — Risk / Return Rank
BUFSX
VOO
BUFSX vs. VOO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Buffalo Small Cap Fund (BUFSX) and Vanguard S&P 500 ETF (VOO). 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.
| BUFSX | VOO | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.09 | 0.98 | -0.89 |
Sortino ratioReturn per unit of downside risk | 0.30 | 1.50 | -1.20 |
Omega ratioGain probability vs. loss probability | 1.04 | 1.23 | -0.19 |
Calmar ratioReturn relative to maximum drawdown | 0.01 | 1.53 | -1.52 |
Martin ratioReturn relative to average drawdown | 0.03 | 7.29 | -7.26 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| BUFSX | VOO | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.09 | 0.98 | -0.89 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | -0.27 | 0.70 | -0.98 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.37 | 0.78 | -0.42 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.43 | 0.83 | -0.40 |
Correlation
The correlation between BUFSX and VOO is 0.81, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
BUFSX vs. VOO - Dividend Comparison
BUFSX has not paid dividends to shareholders, while VOO's dividend yield for the trailing twelve months is around 1.19%.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BUFSX Buffalo Small Cap Fund | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 13.53% | 9.01% | 9.14% | 31.02% | 30.30% | 25.19% | 70.18% |
VOO Vanguard S&P 500 ETF | 1.19% | 1.13% | 1.24% | 1.46% | 1.69% | 1.25% | 1.54% | 1.88% | 2.06% | 1.78% | 2.02% | 2.10% |
Drawdowns
BUFSX vs. VOO - Drawdown Comparison
The maximum BUFSX drawdown since its inception was -53.24%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for BUFSX and VOO.
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Drawdown Indicators
| BUFSX | VOO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -53.24% | -33.99% | -19.25% |
Max Drawdown (1Y)Largest decline over 1 year | -14.92% | -11.98% | -2.94% |
Max Drawdown (5Y)Largest decline over 5 years | -46.57% | -24.52% | -22.05% |
Max Drawdown (10Y)Largest decline over 10 years | -46.74% | -33.99% | -12.75% |
Current DrawdownCurrent decline from peak | -37.02% | -6.29% | -30.73% |
Average DrawdownAverage peak-to-trough decline | -12.82% | -3.72% | -9.10% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 4.21% | 2.52% | +1.69% |
Volatility
BUFSX vs. VOO - Volatility Comparison
Buffalo Small Cap Fund (BUFSX) has a higher volatility of 6.37% compared to Vanguard S&P 500 ETF (VOO) at 5.29%. This indicates that BUFSX's price experiences larger fluctuations and is considered to be riskier than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BUFSX | VOO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.37% | 5.29% | +1.08% |
Volatility (6M)Calculated over the trailing 6-month period | 13.84% | 9.44% | +4.40% |
Volatility (1Y)Calculated over the trailing 1-year period | 23.32% | 18.10% | +5.22% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 24.65% | 16.82% | +7.83% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 24.50% | 17.99% | +6.51% |