BUFIX vs. CIGIX

Last updated Jun 3, 2026

BUFIX (Buffalo International Fund) and CIGIX (Calamos International Growth Fund) are both Foreign Large Cap Equities funds. Over the past 10 years, BUFIX returned 10.23%/yr vs 10.43%/yr for CIGIX. Their correlation of 0.90 suggests significant overlap in exposure. BUFIX charges 1.03%/yr vs 0.85%/yr for CIGIX.

Performance

BUFIX vs. CIGIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Buffalo International Fund (BUFIX) and Calamos International Growth Fund (CIGIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BUFIX achieves a 17.82% return, which is significantly lower than CIGIX's 34.19% return. Both investments have delivered pretty close results over the past 10 years, with BUFIX having a 10.23% annualized return and CIGIX not far ahead at 10.43%.

BUFIX

• 1D: 1.26%
• 1M: 9.49%
• YTD: 17.82%
• 6M: 21.24%
• 1Y: 20.57%
• 3Y*: 11.94%
• 5Y*: 5.91%
• 10Y*: 10.23%

CIGIX

• 1D: 0.82%
• 1M: 13.48%
• YTD: 34.19%
• 6M: 38.88%
• 1Y: 47.10%
• 3Y*: 25.58%
• 5Y*: 4.64%
• 10Y*: 10.43%

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

BUFIX vs. CIGIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BUFIX Buffalo International Fund	17.82%	17.09%	-1.90%	18.33%	-21.80%	18.20%	19.10%	28.01%	-8.85%	29.33%
CIGIX Calamos International Growth Fund	34.19%	23.11%	12.51%	15.33%	-30.54%	-8.98%	44.95%	29.69%	-20.93%	39.54%

Correlation

The correlation between BUFIX and CIGIX is 0.84, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.84
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.89
Correlation (10Y) Calculated over the trailing 10-year period	0.89
Correlation (All Time) Calculated using the full available price history since Oct 2, 2007	0.90

The correlation between BUFIX and CIGIX has been stable across timeframes, ranging from 0.84 to 0.90 - a consistent structural relationship.

Return for Risk

BUFIX vs. CIGIX — Risk / Return Rank

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

BUFIX

BUFIX Risk / Return Rank: 19
BUFIX Sharpe Ratio Rank: 19
BUFIX Sortino Ratio Rank: 18
BUFIX Omega Ratio Rank: 19
BUFIX Calmar Ratio Rank: 19
BUFIX Martin Ratio Rank: 22

CIGIX

CIGIX Risk / Return Rank: 55
CIGIX Sharpe Ratio Rank: 54
CIGIX Sortino Ratio Rank: 48
CIGIX Omega Ratio Rank: 49
CIGIX Calmar Ratio Rank: 66
CIGIX Martin Ratio Rank: 58

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.

BUFIX vs. CIGIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Buffalo International Fund (BUFIX) and Calamos International Growth Fund (CIGIX). 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.

	BUFIX	CIGIX	Difference
Sharpe ratio Return per unit of total volatility	1.27	2.17	-0.90
Sortino ratio Return per unit of downside risk	1.82	2.92	-1.11
Omega ratio Gain probability vs. loss probability	1.23	1.39	-0.15
Calmar ratio Return relative to maximum drawdown	1.67	3.13	-1.46
Martin ratio Return relative to average drawdown	5.83	11.63	-5.80
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BUFIX vs. CIGIX - Sharpe Ratio Comparison

The current BUFIX Sharpe Ratio is 1.27, which is lower than the CIGIX Sharpe Ratio of 2.17. The chart below compares the historical Sharpe Ratios of BUFIX and CIGIX, 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

	BUFIX	CIGIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.27	2.17	-0.90
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.34	0.22	+0.12
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	0.52	+0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.34	0.38	-0.04

Drawdowns

BUFIX vs. CIGIX - Drawdown Comparison

The maximum BUFIX drawdown since its inception was -55.09%, smaller than the maximum CIGIX drawdown of -64.46%. Use the drawdown chart below to compare losses from any high point for BUFIX and CIGIX.

Drawdown Indicators

	BUFIX	CIGIX	Difference
Max Drawdown Largest peak-to-trough decline	-55.09%	-64.46%	+9.37%
Max Drawdown (1Y) Largest decline over 1 year	-12.85%	-15.88%	+3.03%
Max Drawdown (3Y) Largest decline over 3 years	-15.52%	-19.38%	+3.86%
Max Drawdown (5Y) Largest decline over 5 years	-34.93%	-50.15%	+15.22%
Max Drawdown (10Y) Largest decline over 10 years	-34.93%	-50.15%	+15.22%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-9.17%	-15.30%	+6.13%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.68%	4.28%	-0.60%

Volatility

BUFIX vs. CIGIX - Volatility Comparison

The current volatility for Buffalo International Fund (BUFIX) is 7.06%, while Calamos International Growth Fund (CIGIX) has a volatility of 9.64%. This indicates that BUFIX experiences smaller price fluctuations and is considered to be less risky than CIGIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BUFIX	CIGIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.06%	9.64%	-2.58%
Volatility (6M) Calculated over the trailing 6-month period	14.73%	19.73%	-5.00%
Volatility (1Y) Calculated over the trailing 1-year period	17.16%	22.87%	-5.71%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.56%	21.07%	-3.51%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.52%	19.98%	-2.46%

BUFIX vs. CIGIX - Expense Ratio Comparison

BUFIX has a 1.03% expense ratio, which is higher than CIGIX's 0.85% expense ratio.

Dividends

BUFIX vs. CIGIX - Dividend Comparison

BUFIX's dividend yield for the trailing twelve months is around 0.72%, less than CIGIX's 10.05% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUFIX Buffalo International Fund	0.72%	0.85%	0.84%	0.59%	1.85%	1.20%	0.28%	0.57%	2.42%	0.36%	0.00%	0.51%
CIGIX Calamos International Growth Fund	10.05%	13.49%	4.54%	0.28%	0.00%	0.33%	5.42%	0.00%	13.25%	3.76%	0.00%	0.13%

Frequently Asked Questions

Can I hold both BUFIX and CIGIX in my portfolio?

BUFIX and CIGIX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BUFIX or CIGIX?

CIGIX has higher volatility (9.64%) compared to BUFIX (7.06%). In terms of maximum drawdown, BUFIX dropped -55.09% vs CIGIX's -64.46%.

Which has better risk-adjusted returns?

CIGIX currently has the higher Sharpe Ratio (2.17 vs 1.27), 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.