Calamos S&P 500 Structured Alt Protection ETF - September (CPST) Chart & Stock Price History $25.55 -0.04 (-0.16%) As of 05/23/2025 04:10 PM Eastern Add Compare Share Share Chart Stock AnalysisChartHoldingsOwnershipBuy This Stock Calamos S&P 500 Structured Alt Protection ETF - September Stock Price Performance The Calamos S&P 500 Structured Alt Protection ETF - September (CPST) fund chart highlights key performance trends across multiple timeframes. Since the beginning of the year, the fund increased 0.91%. In the past month, the fund has increased 2.00%, reflecting recent market activity. As of the latest close, Calamos S&P 500 Structured Alt Protection ETF - September traded at $25.55 with a market cap of $24.91 million and volume of 52 shares. Receive CPST Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Calamos S&P 500 Structured Alt Protection ETF - September and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance-0.70%1 Month Performance+2.00%3 Month Performance+0.08%Year-To-Date Performance+0.91% CPST Stock Chart for Saturday, May, 24, 2025 CPST Chart by TradingView Calamos S&P 500 Structured Alt Protection ETF - September Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame * Start Date * End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization05/23/2025$25.59$25.55-0.16%$25.55$25.5552 shs$24.91 million05/22/2025$25.58$25.59+0.04%$25.59$25.57302 shs$24.95 million05/21/2025$25.70$25.58-0.47%$25.68$25.581,411 shs$24.94 million05/20/2025$25.73$25.70-0.12%$25.70$25.703 shs$25.06 million05/19/2025$25.72$25.73+0.04%$25.73$25.7382 shs$25.09 million05/16/2025$25.67$25.72+0.19%$25.72$25.63200 shs$25.08 million05/15/2025$25.62$25.67+0.20%$25.67$25.63281 shs$25.03 million05/14/2025$25.63$25.62-0.04%$25.62$25.592,051 shs$24.98 million05/13/2025$25.55$25.63+0.31%$25.63$25.565,508 shs$24.99 million05/12/2025$25.30$25.55+0.99%$25.55$25.52335 shs$24.91 million Get the Latest News and Ratings for CPST and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Calamos S&P 500 Structured Alt Protection ETF - September and its competitors with MarketBeat's FREE daily newsletter. 05/09/2025$25.32$25.30-0.08%$25.30$25.30248 shs$24.67 million05/08/2025$25.26$25.32+0.24%$25.36$25.325,950 shs$24.69 million05/07/2025$25.27$25.26-0.04%$25.26$25.2681 shs$24.63 million05/06/2025$25.30$25.27-0.12%$25.27$25.26164 shs$24.64 million05/05/2025$25.33$25.30-0.12%$25.30$25.3052 shs$24.67 million05/02/2025$25.24$25.33+0.36%$25.39$25.2912,076 shs$24.70 million05/01/2025$25.26$25.24-0.08%$25.24$25.242 shs$24.61 million04/30/2025$25.16$25.26+0.40%$25.26$25.023,386 shs$24.63 million04/29/2025$25.12$25.16+0.16%$25.16$25.1650 shs$24.53 million04/28/2025$25.08$25.12+0.16%$25.12$25.1267 shs$25.12 million04/25/2025$25.05$25.08+0.12%$25.08$25.0891 shs$25.08 million04/24/2025$24.94$25.05+0.44%$25.05$25.04419 shs$25.05 million04/23/2025$24.84$24.94+0.40%$24.96$24.94658 shs$24.94 million Related Companies Calvert US Large-Cap Diversity, Equity and Inclusion Index ETF Stock Chart SoFi Social 50 ETF Stock Chart AllianzIM 6 Month Buffer10 Allocation ETF Stock Chart AllianzIM Buffer15 Uncapped Allocation ETF Stock Chart First Trust S&P 500 Diversified Dividend Aristocrats ETF Stock Chart Roundhill Acquirers Deep Value ETF Stock Chart FT Vest U.S. Equity Equal Weight Buffer ETF - June Stock Chart Argent Large Cap ETF Stock Chart Direxion Daily S&P 500 High Beta Bear 3X Shares Stock Chart NestYield Dynamic Income Shield ETF Stock Chart Receive CPST Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Calamos S&P 500 Structured Alt Protection ETF - September and its competitors with MarketBeat's FREE daily newsletter. 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