Calamos S&P 500 Structured Alt Protection ETF - September (CPST) Stock Price, News & Analysis
Price Move History
- Daily moves over 5%
- 0 252 sessions, September 17, 2025 to September 17, 2026
- Largest daily move
- +0.6% close of April 8, 2026
- 1-year change
- +5.1% closing prices, September 17, 2025 to September 17, 2026
- 5-year change
- +456.8% closing prices, September 17, 2021 to September 17, 2026
Company Description
CPST has gained 5.1% over the past year. The last closing price was $28.06.
This page collects what Stock Titan holds for CPST, including price data, latest news, SEC filings, insider trading activity, financial highlights, upcoming events, and short interest trends.
Stock Performance
Calamos S&P 500 Structured Alt Protection ETF - September (CPST) closed at $28.06 on September 17, 2026. Over the past 12 months, the price has gained 5.1%.
CPST Metrics & Rankings
Price returns through September 17, 2026. Month-to-date and YTD include the first trading day. Ranking links may use different dates.
Latest News
Calamos S&P 500 Structured Alt Protection ETF - September has 10 recent news articles. Of the recent coverage, 2 articles coincided with positive price movement and 6 with negative movement. Key topics include crypto, earnings, conferences. View all CPST news →
SEC Filings
Financial Highlights
Upcoming Events
Short Interest History
Short interest in Calamos S&P 500 Structured Alt Protection ETF - September (CPST) currently stands at 11.8 thousand shares, up 178.2% from the previous reporting period, representing 1.0% of the shares outstanding. The 7.6 days to cover indicates moderate liquidity for short covering.
Days to Cover History
Days to cover for Calamos S&P 500 Structured Alt Protection ETF - September (CPST) currently stands at 7.6 days, up 315.3% from the previous period. This moderate days-to-cover ratio suggests reasonable liquidity for short covering, requiring about a week of average trading volume. The days to cover has increased 231.9% over the past year, indicating either rising short interest or declining trading volume. The ratio has shown significant volatility over the period, ranging from 1.0 to 7.6 days.