CPST vs. SMST

Last updated Jul 14, 2026

CPST (Calamos S&P 500 Structured Alt Protection ETF - September) and SMST (Defiance Daily Target 2X Short MSTR ETF) are both exchange-traded funds - CPST is a Defined Outcome fund tracking the MerQube Cap Protect US Lrg Cap PR Index - Sep, while SMST is a Inverse Equities fund actively managed by Defiance. CPST is passively managed, while SMST is actively managed. Over the past year, CPST returned 6.51% vs 240.03% for SMST. At a correlation of -0.42, they often move in opposite directions. CPST charges 0.69%/yr vs 1.29%/yr for SMST.

Performance

CPST vs. SMST - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos S&P 500 Structured Alt Protection ETF - September (CPST) and Defiance Daily Target 2X Short MSTR ETF (SMST). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPST achieves a 3.20% return, which is significantly higher than SMST's -27.96% return.

CPST

• 1D: -0.04%
• 1M: 0.56%
• 6M: 2.86%
• YTD: 3.20%
• 1Y: 6.51%
• 3Y*: —
• 5Y*: —
• 10Y*: —

SMST

• 1D: 5.26%
• 1M: 44.38%
• 6M: -15.07%
• YTD: -27.96%
• 1Y: 240.03%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CPST vs. SMST - Yearly Performance Comparison

	2026 (YTD)	2025	2024
CPST Calamos S&P 500 Structured Alt Protection ETF - September	3.20%	6.73%	1.97%
SMST Defiance Daily Target 2X Short MSTR ETF	-27.96%	-44.36%	-91.39%

Correlation

The correlation between CPST and SMST is -0.46, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.46
Correlation (All Time) Calculated using the full available price history since Sep 3, 2024	-0.42

Return for Risk

CPST vs. SMST — Risk / Return Rank

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

CPST

CPST Risk / Return Rank: 95
CPST Sharpe Ratio Rank: 96
CPST Sortino Ratio Rank: 97
CPST Omega Ratio Rank: 97
CPST Calmar Ratio Rank: 91
CPST Martin Ratio Rank: 96

SMST

SMST Risk / Return Rank: 60
SMST Sharpe Ratio Rank: 62
SMST Sortino Ratio Rank: 63
SMST Omega Ratio Rank: 63
SMST Calmar Ratio Rank: 71
SMST Martin Ratio Rank: 43

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.

CPST vs. SMST - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos S&P 500 Structured Alt Protection ETF - September (CPST) and Defiance Daily Target 2X Short MSTR ETF (SMST). 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.

	CPST	SMST	Difference
Sharpe ratio: Return per unit of total volatility	3.21	1.62	+1.59
Sortino ratio: Return per unit of downside risk	5.22	2.33	+2.88
Omega ratio: Gain probability vs. loss probability	1.72	1.30	+0.41
Calmar ratio: Return relative to maximum drawdown	4.60	2.83	+1.77
Martin ratio: Return relative to average drawdown	24.79	5.47	+19.32

CPST vs. SMST - Sharpe Ratio Comparison

The current CPST Sharpe Ratio is 3.21, which is higher than the SMST Sharpe Ratio of 1.62. The chart below compares the historical Sharpe Ratios of CPST and SMST, 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

CPST vs. SMST - Drawdown Comparison

The maximum CPST drawdown since its inception was -3.79%, smaller than the maximum SMST drawdown of -99.25%. Use the drawdown chart below to compare losses from any high point for CPST and SMST.

Drawdown Indicators

	CPST	SMST	Difference
Max Drawdown Largest peak-to-trough decline	-3.79%	-99.25%	+95.46%
Max Drawdown (1Y) Largest decline over 1 year	-1.42%	-85.39%	+83.97%
Current Drawdown Current decline from peak	-0.04%	-97.17%	+97.13%
Average Drawdown Average peak-to-trough decline	-0.33%	-90.89%	+90.56%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.26%	44.09%	-43.83%

Volatility

CPST vs. SMST - Volatility Comparison

The current volatility for Calamos S&P 500 Structured Alt Protection ETF - September (CPST) is 0.40%, while Defiance Daily Target 2X Short MSTR ETF (SMST) has a volatility of 56.59%. This indicates that CPST experiences smaller price fluctuations and is considered to be less risky than SMST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPST	SMST	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.40%	56.59%	-56.19%
Volatility (6M) Calculated over the trailing 6-month period	1.59%	135.88%	-134.29%
Volatility (1Y) Calculated over the trailing 1-year period	2.04%	149.23%	-147.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.30%	167.74%	-164.44%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.30%	167.74%	-164.44%

CPST vs. SMST - Expense Ratio Comparison

CPST has a 0.69% expense ratio, which is lower than SMST's 1.29% expense ratio.

Dividends

CPST vs. SMST - Dividend Comparison

Neither CPST nor SMST has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both CPST and SMST in my portfolio?

CPST and SMST have a correlation of -0.46, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CPST or SMST?

SMST has higher volatility (56.59%) compared to CPST (0.40%). In terms of maximum drawdown, CPST dropped -3.79% vs SMST's -99.25%.

Which ETF is better, CPST or SMST?

On 1-year performance, SMST leads with 240.03% vs 6.51% for CPST. On fees, CPST is cheaper at 0.69% per year. On volatility, CPST has been the lower-risk option at 0.40%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, CPST or SMST?

Over the 1-year period, SMST has performed better with a 240.03% return vs 6.51%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CPST or SMST?

CPST is cheaper with a 0.69% expense ratio, compared with 1.29% for SMST.

Which ETF pays a higher dividend yield, CPST or SMST?

CPST and SMST have nearly identical dividend yields, around 0.00%.

What is the main difference between CPST and SMST?

CPST is categorized as Defined Outcome, while SMST is Inverse Equities. They also come from different issuers: Calamos and Defiance. Their fees differ too: 0.69% for CPST and 1.29% for SMST.

Which has better risk-adjusted returns?

CPST currently has the higher Sharpe Ratio (3.21 vs 1.62), 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.