COPLX vs. BUFBX

Last updated Aug 1, 2026

COPLX (Copley Fund) and BUFBX (Buffalo Flexible Income Fund) are both Large Cap Value Equities funds. Over the past 10 years, COPLX returned 11.15%/yr vs 9.85%/yr for BUFBX. Their 0.69 correlation means they have sometimes moved together and sometimes differently. COPLX charges 2.37%/yr vs 1.01%/yr for BUFBX.

Performance

COPLX vs. BUFBX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Copley Fund (COPLX) and Buffalo Flexible Income Fund (BUFBX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COPLX achieves a 10.44% return, which is significantly lower than BUFBX's 14.30% return. Over the past 10 years, COPLX has outperformed BUFBX with an annualized return of 11.15%, while BUFBX has yielded a comparatively lower 9.85% annualized return.

COPLX

• 1D: 0.33%
• 1M: 1.98%
• 6M: 10.55%
• YTD: 10.44%
• 1Y: 19.09%
• 3Y*: 16.08%
• 5Y*: 10.24%
• 10Y*: 11.15%
• ALL TIME*: 7.80%

BUFBX

• 1D: 0.13%
• 1M: 3.53%
• 6M: 9.54%
• YTD: 14.30%
• 1Y: 20.62%
• 3Y*: 12.64%
• 5Y*: 11.50%
• 10Y*: 9.85%
• ALL TIME*: 7.88%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
BUFBX Buffalo Flexible Income Fund	$0.00	$0.00	$0.00
COPLX Copley Fund	$0.00	$0.00	$0.00

COPLX vs. BUFBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
COPLX Copley Fund	10.44%	16.24%	18.18%	17.33%	-15.21%	18.39%	1.09%	25.59%	15.65%	9.49%
BUFBX Buffalo Flexible Income Fund	14.30%	10.37%	10.26%	7.42%	3.97%	29.97%	-2.27%	18.76%	-7.01%	13.20%

Correlation

The correlation between COPLX and BUFBX is 0.41, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.41
Correlation (3Y) Balances recent behavior with more history.	0.62
Correlation (5Y) Shows whether the relationship held over a longer period.	0.72
Correlation (10Y) Provides a long-term view across more market conditions.	0.69
Correlation (All Time) Calculated using the full available price history since Jun 20, 1996	0.69

Over the past year, the correlation between COPLX and BUFBX has dropped to 0.41 - well below their long-term average of 0.69, suggesting their price drivers have been diverging.

Return for Risk

COPLX vs. BUFBX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

COPLX

COPLX Risk / Return Rank: 66
COPLX Sharpe Ratio Rank: 70
COPLX Sortino Ratio Rank: 68
COPLX Omega Ratio Rank: 65
COPLX Calmar Ratio Rank: 68
COPLX Martin Ratio Rank: 58

BUFBX

BUFBX Risk / Return Rank: 87
BUFBX Sharpe Ratio Rank: 84
BUFBX Sortino Ratio Rank: 81
BUFBX Omega Ratio Rank: 79
BUFBX Calmar Ratio Rank: 96
BUFBX Martin Ratio Rank: 94

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

COPLX vs. BUFBX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Copley Fund (COPLX) and Buffalo Flexible Income Fund (BUFBX). 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.

	COPLX	BUFBX	Difference
Sharpe ratio: Return per unit of total volatility	1.64	2.02	-0.37
Sortino ratio: Return per unit of downside risk	2.31	2.83	-0.52
Omega ratio: Gain probability vs. loss probability	1.29	1.36	-0.07
Calmar ratio: Return relative to maximum drawdown	2.24	4.42	-2.18
Martin ratio: Return relative to average drawdown	7.58	14.28	-6.69

COPLX vs. BUFBX - Sharpe Ratio Comparison

The current COPLX Sharpe Ratio is 1.64, which is comparable to the BUFBX Sharpe Ratio of 2.02. The chart below compares the historical Sharpe Ratios of COPLX and BUFBX, 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

COPLX vs. BUFBX - Drawdown Comparison

The maximum COPLX drawdown since its inception was -44.70%, which is greater than BUFBX's maximum drawdown of -39.78%. Use the drawdown chart below to compare losses from any high point for COPLX and BUFBX.

Drawdown Indicators

	COPLX	BUFBX	Difference
Max Drawdown Largest peak-to-trough decline	-44.70%	-39.78%	-4.92%
Max Drawdown (1Y) Largest decline over 1 year	-7.88%	-4.45%	-3.43%
Max Drawdown (3Y) Largest decline over 3 years	-18.21%	-12.85%	-5.36%
Max Drawdown (5Y) Largest decline over 5 years	-20.23%	-14.67%	-5.56%
Max Drawdown (10Y) Largest decline over 10 years	-36.61%	-35.51%	-1.10%
Current Drawdown Current decline from peak	-0.71%	0.00%	-0.71%
Average Drawdown Average peak-to-trough decline	-8.92%	-4.71%	-4.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.33%	1.38%	+0.95%

Volatility

COPLX vs. BUFBX - Volatility Comparison

The current volatility for Copley Fund (COPLX) is 3.06%, while Buffalo Flexible Income Fund (BUFBX) has a volatility of 3.73%. This indicates that COPLX experiences smaller price fluctuations and is considered to be less risky than BUFBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COPLX	BUFBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.06%	3.73%	-0.67%
Volatility (6M) Calculated over the trailing 6-month period	8.18%	7.75%	+0.43%
Volatility (1Y) Calculated over the trailing 1-year period	10.76%	9.81%	+0.95%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.03%	13.47%	+0.56%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.63%	15.60%	+1.03%

COPLX vs. BUFBX - Expense Ratio Comparison

COPLX has a 2.37% expense ratio, which is higher than BUFBX's 1.01% expense ratio.

Dividends

COPLX vs. BUFBX - Dividend Comparison

COPLX has not paid dividends to shareholders, while BUFBX's dividend yield for the trailing twelve months is around 7.97%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUFBX Buffalo Flexible Income Fund	7.97%	9.10%	3.77%	3.48%	4.16%	5.57%	3.33%	2.73%	6.01%	5.49%	2.39%	3.67%
COPLX Copley Fund	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both COPLX and BUFBX in my portfolio?

COPLX and BUFBX have a correlation of 0.41, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, COPLX or BUFBX?

BUFBX has higher volatility (3.73%) compared to COPLX (3.06%). In terms of maximum drawdown, COPLX dropped -44.70% vs BUFBX's -39.78%.

Which has better risk-adjusted returns?

BUFBX currently has the higher Sharpe Ratio (2.02 vs 1.64), 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.