CMCIX vs. BUFOX

Last updated Apr 1, 2026

Compare and contrast key facts about Calvert Small/Mid-Cap Fund Class I (CMCIX) and Buffalo Early Stage Growth Fund (BUFOX).

CMCIX is an actively managed fund by Calvert Research and Management. It was launched on Jul 29, 2011. BUFOX is managed by Buffalo. It was launched on May 21, 2004.

Performance

CMCIX vs. BUFOX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calvert Small/Mid-Cap Fund Class I (CMCIX) and Buffalo Early Stage Growth Fund (BUFOX). The values are adjusted to include any dividend payments, if applicable.

CMCIX vs. BUFOX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
CMCIX Calvert Small/Mid-Cap Fund Class I	-4.71%	-5.28%	10.46%	7.81%
BUFOX Buffalo Early Stage Growth Fund	-7.88%	3.09%	7.52%	6.79%

Returns By Period

In the year-to-date period, CMCIX achieves a -4.71% return, which is significantly higher than BUFOX's -7.88% return.

CMCIX

• 1D: -0.17%
• 1M: -8.88%
• YTD: -4.71%
• 6M: -7.29%
• 1Y: -5.78%
• 3Y*: —
• 5Y*: —
• 10Y*: —

BUFOX

• 1D: -1.32%
• 1M: -12.04%
• YTD: -7.88%
• 6M: -8.82%
• 1Y: 5.40%
• 3Y*: 1.52%
• 5Y*: -4.97%
• 10Y*: 8.73%

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

CMCIX vs. BUFOX - Expense Ratio Comparison

CMCIX has a 1.26% expense ratio, which is lower than BUFOX's 1.46% expense ratio.

BUFOX

Buffalo Early Stage Growth Fund

CMCIX

Calvert Small/Mid-Cap Fund Class I

Return for Risk

CMCIX vs. BUFOX — Risk / Return Rank

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

CMCIX

CMCIX Risk / Return Rank: 2
CMCIX Sharpe Ratio Rank: 2
CMCIX Sortino Ratio Rank: 2
CMCIX Omega Ratio Rank: 2
CMCIX Calmar Ratio Rank: 1
CMCIX Martin Ratio Rank: 2

BUFOX

BUFOX Risk / Return Rank: 10
BUFOX Sharpe Ratio Rank: 9
BUFOX Sortino Ratio Rank: 10
BUFOX Omega Ratio Rank: 9
BUFOX Calmar Ratio Rank: 10
BUFOX Martin Ratio Rank: 10

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.

CMCIX vs. BUFOX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calvert Small/Mid-Cap Fund Class I (CMCIX) and Buffalo Early Stage Growth Fund (BUFOX). 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.

	CMCIX	BUFOX	Difference
Sharpe ratio Return per unit of total volatility	-0.29	0.21	-0.50
Sortino ratio Return per unit of downside risk	-0.30	0.47	-0.77
Omega ratio Gain probability vs. loss probability	0.96	1.06	-0.09
Calmar ratio Return relative to maximum drawdown	-0.54	0.20	-0.74
Martin ratio Return relative to average drawdown	-1.39	0.64	-2.02
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CMCIX vs. BUFOX - Sharpe Ratio Comparison

The current CMCIX Sharpe Ratio is -0.29, which is lower than the BUFOX Sharpe Ratio of 0.21. The chart below compares the historical Sharpe Ratios of CMCIX and BUFOX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	CMCIX	BUFOX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.29	0.21	-0.50
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	-0.22	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.39	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.18	0.32	-0.14

Correlation

The correlation between CMCIX and BUFOX is 0.85, 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

CMCIX vs. BUFOX - Dividend Comparison

CMCIX's dividend yield for the trailing twelve months is around 4.46%, less than BUFOX's 5.54% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CMCIX Calvert Small/Mid-Cap Fund Class I	4.46%	4.25%	7.13%	0.60%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
BUFOX Buffalo Early Stage Growth Fund	5.54%	5.10%	0.00%	0.00%	1.20%	15.83%	11.19%	4.77%	14.50%	20.01%	8.35%	8.53%

Drawdowns

CMCIX vs. BUFOX - Drawdown Comparison

The maximum CMCIX drawdown since its inception was -21.50%, smaller than the maximum BUFOX drawdown of -69.71%. Use the drawdown chart below to compare losses from any high point for CMCIX and BUFOX.

Drawdown Indicators

	CMCIX	BUFOX	Difference
Max Drawdown Largest peak-to-trough decline	-21.50%	-69.71%	+48.21%
Max Drawdown (1Y) Largest decline over 1 year	-12.55%	-15.52%	+2.97%
Max Drawdown (5Y) Largest decline over 5 years	—	-43.17%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-43.17%	—
Current Drawdown Current decline from peak	-16.43%	-29.15%	+12.72%
Average Drawdown Average peak-to-trough decline	-6.16%	-16.02%	+9.86%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.90%	4.90%	0.00%

Volatility

CMCIX vs. BUFOX - Volatility Comparison

The current volatility for Calvert Small/Mid-Cap Fund Class I (CMCIX) is 4.68%, while Buffalo Early Stage Growth Fund (BUFOX) has a volatility of 8.02%. This indicates that CMCIX experiences smaller price fluctuations and is considered to be less risky than BUFOX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CMCIX	BUFOX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.68%	8.02%	-3.34%
Volatility (6M) Calculated over the trailing 6-month period	10.54%	16.76%	-6.22%
Volatility (1Y) Calculated over the trailing 1-year period	19.19%	24.46%	-5.27%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.61%	22.75%	-6.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.61%	22.32%	-5.71%