CTSIX vs. OBMCX

Last updated Aug 1, 2026

CTSIX (Calamos Timpani Small Cap Growth Fund) and OBMCX (Oberweis Micro Cap Fund) are both Small Cap Growth Equities funds. Over the past 5 years, CTSIX returned 7.39%/yr vs 18.01%/yr for OBMCX. Their correlation of 0.91 means they have usually moved in the same direction. CTSIX charges 1.05%/yr vs 1.48%/yr for OBMCX.

Performance

CTSIX vs. OBMCX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos Timpani Small Cap Growth Fund (CTSIX) and Oberweis Micro Cap Fund (OBMCX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CTSIX achieves a 19.41% return, which is significantly lower than OBMCX's 35.57% return.

CTSIX

• 1D: 3.86%
• 1M: -9.55%
• 6M: 20.97%
• YTD: 19.41%
• 1Y: 40.16%
• 3Y*: 27.23%
• 5Y*: 7.39%
• 10Y*: —
• ALL TIME*: 14.57%

OBMCX

• 1D: 5.04%
• 1M: -6.99%
• 6M: 28.25%
• YTD: 35.57%
• 1Y: 52.75%
• 3Y*: 22.46%
• 5Y*: 18.01%
• 10Y*: 20.12%
• ALL TIME*: 11.14%

*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)
CTSIX Calamos Timpani Small Cap Growth Fund	$0.00	$0.00	$0.00
OBMCX Oberweis Micro Cap Fund	$0.00	$0.00	$0.00

CTSIX vs. OBMCX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
CTSIX Calamos Timpani Small Cap Growth Fund	19.41%	25.90%	44.34%	7.57%	-37.30%	9.12%	63.38%	1.20%
OBMCX Oberweis Micro Cap Fund	35.57%	14.70%	22.82%	18.87%	-10.57%	53.20%	29.91%	0.54%

Correlation

The correlation between CTSIX and OBMCX is 0.90, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.90
Correlation (3Y) Balances recent behavior with more history.	0.91
Correlation (5Y) Shows whether the relationship held over a longer period.	0.91
Correlation (All Time) Calculated using the full available price history since Jun 10, 2019	0.91

The correlation between CTSIX and OBMCX has been stable across timeframes, ranging from 0.90 to 0.91 - a consistent structural relationship.

Return for Risk

CTSIX vs. OBMCX — Risk / Return Rank

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

CTSIX

CTSIX Risk / Return Rank: 55
CTSIX Sharpe Ratio Rank: 45
CTSIX Sortino Ratio Rank: 44
CTSIX Omega Ratio Rank: 42
CTSIX Calmar Ratio Rank: 66
CTSIX Martin Ratio Rank: 77

OBMCX

OBMCX Risk / Return Rank: 79
OBMCX Sharpe Ratio Rank: 78
OBMCX Sortino Ratio Rank: 72
OBMCX Omega Ratio Rank: 70
OBMCX Calmar Ratio Rank: 86
OBMCX Martin Ratio Rank: 90

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.

CTSIX vs. OBMCX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos Timpani Small Cap Growth Fund (CTSIX) and Oberweis Micro Cap Fund (OBMCX). 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.

	CTSIX	OBMCX	Difference
Sharpe ratio: Return per unit of total volatility	1.25	1.79	-0.54
Sortino ratio: Return per unit of downside risk	1.80	2.38	-0.58
Omega ratio: Gain probability vs. loss probability	1.22	1.30	-0.08
Calmar ratio: Return relative to maximum drawdown	2.15	2.99	-0.84
Martin ratio: Return relative to average drawdown	9.15	12.18	-3.02

CTSIX vs. OBMCX - Sharpe Ratio Comparison

The current CTSIX Sharpe Ratio is 1.25, which is lower than the OBMCX Sharpe Ratio of 1.79. The chart below compares the historical Sharpe Ratios of CTSIX and OBMCX, 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

CTSIX vs. OBMCX - Drawdown Comparison

The maximum CTSIX drawdown since its inception was -50.83%, smaller than the maximum OBMCX drawdown of -68.24%. Use the drawdown chart below to compare losses from any high point for CTSIX and OBMCX.

Drawdown Indicators

	CTSIX	OBMCX	Difference
Max Drawdown Largest peak-to-trough decline	-50.83%	-68.24%	+17.41%
Max Drawdown (1Y) Largest decline over 1 year	-17.99%	-17.19%	-0.80%
Max Drawdown (3Y) Largest decline over 3 years	-28.40%	-28.11%	-0.29%
Max Drawdown (5Y) Largest decline over 5 years	-50.60%	-28.11%	-22.49%
Max Drawdown (10Y) Largest decline over 10 years	—	-50.04%	—
Current Drawdown Current decline from peak	-14.82%	-13.01%	-1.81%
Average Drawdown Average peak-to-trough decline	-20.30%	-16.36%	-3.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.22%	4.21%	+0.01%

Volatility

CTSIX vs. OBMCX - Volatility Comparison

The current volatility for Calamos Timpani Small Cap Growth Fund (CTSIX) is 10.53%, while Oberweis Micro Cap Fund (OBMCX) has a volatility of 11.67%. This indicates that CTSIX experiences smaller price fluctuations and is considered to be less risky than OBMCX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CTSIX	OBMCX	Difference
Volatility (1M) Calculated over the trailing 1-month period	10.53%	11.67%	-1.14%
Volatility (6M) Calculated over the trailing 6-month period	25.50%	23.58%	+1.92%
Volatility (1Y) Calculated over the trailing 1-year period	31.00%	28.71%	+2.29%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	28.61%	26.80%	+1.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	30.02%	26.25%	+3.77%

CTSIX vs. OBMCX - Expense Ratio Comparison

CTSIX has a 1.05% expense ratio, which is lower than OBMCX's 1.48% expense ratio.

Dividends

CTSIX vs. OBMCX - Dividend Comparison

CTSIX has not paid dividends to shareholders, while OBMCX's dividend yield for the trailing twelve months is around 1.04%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CTSIX Calamos Timpani Small Cap Growth Fund	0.00%	0.00%	2.58%	0.00%	0.00%	0.00%	3.77%	4.95%	0.00%	0.00%	0.00%	0.00%
OBMCX Oberweis Micro Cap Fund	1.04%	1.41%	2.53%	0.00%	1.37%	24.35%	0.00%	0.00%	19.67%	11.76%	0.05%	3.07%

Frequently Asked Questions

Can I hold both CTSIX and OBMCX in my portfolio?

With a correlation of 0.90, CTSIX and OBMCX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, CTSIX or OBMCX?

OBMCX has higher volatility (11.67%) compared to CTSIX (10.53%). In terms of maximum drawdown, CTSIX dropped -50.83% vs OBMCX's -68.24%.

Which has better risk-adjusted returns?

OBMCX currently has the higher Sharpe Ratio (1.79 vs 1.25), 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.