NSEIX vs. BUFBX

Last updated Jun 4, 2026

NSEIX (Nicholas Equity Income Fund) and BUFBX (Buffalo Flexible Income Fund) are both Large Cap Value Equities funds. Over the past 10 years, NSEIX returned 9.94%/yr vs 10.00%/yr for BUFBX. A 0.80 correlation means they provide meaningful diversification when combined. NSEIX charges 0.70%/yr vs 1.01%/yr for BUFBX.

Performance

NSEIX vs. BUFBX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Nicholas Equity Income Fund (NSEIX) 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, NSEIX achieves a 5.42% return, which is significantly lower than BUFBX's 12.83% return. Both investments have delivered pretty close results over the past 10 years, with NSEIX having a 9.94% annualized return and BUFBX not far ahead at 10.00%.

NSEIX

• 1D: 0.78%
• 1M: 1.36%
• YTD: 5.42%
• 6M: 5.53%
• 1Y: 13.81%
• 3Y*: 12.78%
• 5Y*: 7.25%
• 10Y*: 9.94%

BUFBX

• 1D: 0.57%
• 1M: 3.64%
• YTD: 12.83%
• 6M: 12.77%
• 1Y: 19.88%
• 3Y*: 13.91%
• 5Y*: 11.23%
• 10Y*: 10.00%

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

NSEIX vs. BUFBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NSEIX Nicholas Equity Income Fund	5.42%	13.80%	9.97%	7.87%	-6.90%	24.76%	5.60%	30.29%	-4.48%	12.42%
BUFBX Buffalo Flexible Income Fund	12.83%	10.37%	10.26%	7.42%	3.97%	29.97%	-2.27%	18.76%	-7.01%	13.20%

Correlation

The correlation between NSEIX and BUFBX is 0.67, 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	0.67
Correlation (3Y) Calculated over the trailing 3-year period	0.78
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 Aug 15, 1994	0.80

The correlation between NSEIX and BUFBX shifts across timeframes, from 0.67 (1 year) to 0.85 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

NSEIX vs. BUFBX — Risk / Return Rank

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

NSEIX

NSEIX Risk / Return Rank: 27
NSEIX Sharpe Ratio Rank: 27
NSEIX Sortino Ratio Rank: 27
NSEIX Omega Ratio Rank: 26
NSEIX Calmar Ratio Rank: 29
NSEIX Martin Ratio Rank: 26

BUFBX

BUFBX Risk / Return Rank: 71
BUFBX Sharpe Ratio Rank: 60
BUFBX Sortino Ratio Rank: 59
BUFBX Omega Ratio Rank: 52
BUFBX Calmar Ratio Rank: 97
BUFBX Martin Ratio Rank: 89

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.

NSEIX vs. BUFBX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nicholas Equity Income Fund (NSEIX) 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.

	NSEIX	BUFBX	Difference
Sharpe ratio: Return per unit of total volatility	1.48	2.28	-0.80
Sortino ratio: Return per unit of downside risk	2.18	3.24	-1.06
Omega ratio: Gain probability vs. loss probability	1.27	1.40	-0.13
Calmar ratio: Return relative to maximum drawdown	2.01	7.18	-5.16
Martin ratio: Return relative to average drawdown	6.23	17.54	-11.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NSEIX vs. BUFBX - Sharpe Ratio Comparison

The current NSEIX Sharpe Ratio is 1.48, which is lower than the BUFBX Sharpe Ratio of 2.28. The chart below compares the historical Sharpe Ratios of NSEIX 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.

Sharpe Ratios by Period

	NSEIX	BUFBX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.48	2.28	-0.80
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.53	0.84	-0.31
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.63	0.64	-0.02
Sharpe Ratio (All Time) Calculated using the full available price history	0.58	0.59	-0.01

Drawdowns

NSEIX vs. BUFBX - Drawdown Comparison

The maximum NSEIX drawdown since its inception was -48.12%, which is greater than BUFBX's maximum drawdown of -39.78%. Use the drawdown chart below to compare losses from any high point for NSEIX and BUFBX.

Drawdown Indicators

	NSEIX	BUFBX	Difference
Max Drawdown Largest peak-to-trough decline	-48.12%	-39.78%	-8.34%
Max Drawdown (1Y) Largest decline over 1 year	-7.30%	-2.83%	-4.47%
Max Drawdown (3Y) Largest decline over 3 years	-14.68%	-12.85%	-1.83%
Max Drawdown (5Y) Largest decline over 5 years	-18.98%	-14.67%	-4.31%
Max Drawdown (10Y) Largest decline over 10 years	-33.47%	-35.51%	+2.04%
Current Drawdown Current decline from peak	-1.52%	-0.22%	-1.30%
Average Drawdown Average peak-to-trough decline	-5.81%	-4.72%	-1.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.35%	1.16%	+1.19%

Volatility

NSEIX vs. BUFBX - Volatility Comparison

The current volatility for Nicholas Equity Income Fund (NSEIX) is 2.55%, while Buffalo Flexible Income Fund (BUFBX) has a volatility of 3.06%. This indicates that NSEIX 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

	NSEIX	BUFBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.55%	3.06%	-0.51%
Volatility (6M) Calculated over the trailing 6-month period	7.38%	6.61%	+0.77%
Volatility (1Y) Calculated over the trailing 1-year period	9.91%	8.93%	+0.98%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	13.68%	13.40%	+0.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.94%	15.60%	+0.34%

NSEIX vs. BUFBX - Expense Ratio Comparison

NSEIX has a 0.70% expense ratio, which is lower than BUFBX's 1.01% expense ratio.

Dividends

NSEIX vs. BUFBX - Dividend Comparison

NSEIX's dividend yield for the trailing twelve months is around 3.69%, less than BUFBX's 7.99% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUFBX Buffalo Flexible Income Fund	7.99%	9.10%	3.77%	3.48%	4.16%	5.57%	3.33%	2.73%	6.01%	5.49%	2.39%	3.67%
NSEIX Nicholas Equity Income Fund	3.69%	10.85%	4.03%	4.28%	3.92%	11.53%	1.97%	13.05%	17.55%	6.83%	3.85%	7.26%

Frequently Asked Questions

Can I hold both NSEIX and BUFBX in my portfolio?

NSEIX and BUFBX have a correlation of 0.67, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NSEIX or BUFBX?

BUFBX has higher volatility (3.06%) compared to NSEIX (2.55%). In terms of maximum drawdown, NSEIX dropped -48.12% vs BUFBX's -39.78%.

Which has better risk-adjusted returns?

BUFBX currently has the higher Sharpe Ratio (2.28 vs 1.48), 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.