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Calamos S&P 500 Structured Alt Protection ETF - September (CPST) Stock Price, News & Analysis

CPST NYSE

Company Description

Calamos S&P 500 Structured Alt Protection ETF - September (NYSE: CPST) is a publicly traded company.

CPST stock has gained 6.3% over the past year. Shares last traded at $27.89.

This page provides a comprehensive overview of CPST stock, including price data, latest news, SEC filings, insider trading activity, financial highlights, upcoming events, and short interest trends.

Stock Performance

$27.87
-0.13%
0.04
Last updated: July 17, 2026 at 10:27
+6.29%
Performance 1 year

Calamos S&P 500 Structured Alt Protection ETF - September (CPST) stock last traded at $27.89, down 0.13% from the previous close. Over the past 12 months, the stock has gained 6.3%.

See what a $1,000 investment in CPST would be worth today

SEC Filings

No SEC filings available for CPST.

Financial Highlights

Revenue (TTM)
Net Income (TTM)
Operating Cash Flow

Upcoming Events

Short Interest History

Last 12 Months

Short interest in Calamos S&P 500 Structured Alt Protection ETF - September (CPST) currently stands at 2.3 thousand shares, down 50.0% from the previous reporting period, representing 0.2% of the shares outstanding. Over the past 12 months, short interest has increased by 148.7%.

Days to Cover History

Last 12 Months

Days to cover for Calamos S&P 500 Structured Alt Protection ETF - September (CPST) currently stands at 1.7 days, down 43.7% from the previous period. This low days-to-cover ratio indicates high liquidity, allowing short sellers to quickly exit positions if needed. The days to cover has increased 69% over the past year, indicating improving liquidity conditions. The ratio has shown significant volatility over the period, ranging from 1.0 to 5.6 days.

Frequently Asked Questions

What is the current stock price of Calamos S&P 500 Structured Alt Protection ETF - September (CPST)?

The current stock price of Calamos S&P 500 Structured Alt Protection ETF - September (CPST) is $27.89 as of July 17, 2026.