Calamos S&P 500 Structured Alt Protection ETF - October (CPSO) Chart & Stock Price History $26.30 -0.01 (-0.04%) Closing price 04:10 PM EasternExtended Trading$26.31 +0.01 (+0.03%) As of 04:10 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisChartHoldingsOwnershipBuy This Stock Calamos S&P 500 Structured Alt Protection ETF - October Stock Price Performance The Calamos S&P 500 Structured Alt Protection ETF - October (CPSO) fund chart highlights key performance trends across multiple timeframes. Since the beginning of the year, the fund increased 3.22%. In the past month, the fund has increased 1.35%, reflecting recent market activity. As of the latest close, Calamos S&P 500 Structured Alt Protection ETF - October traded at $26.31 with a market cap of $17.76 million and volume of 1,022 shares. 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Email Address 5 Day Performance0.00%1 Month Performance+1.35%3 Month Performance+4.24%Year-To-Date Performance+3.22% CPSO Stock Chart for Tuesday, July, 15, 2025 CPSO Chart by TradingView Calamos S&P 500 Structured Alt Protection ETF - October 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 Capitalization07/15/2025$26.31$26.30-0.04%$26.30$26.30235 shs$17.75 million07/14/2025$26.31$26.31$26.31$26.271,022 shs$17.76 million07/11/2025$26.30$26.31+0.04%$26.31$26.31139 shs$17.76 million07/10/2025$26.30$26.30$26.30$26.3029 shs$17.75 million07/09/2025$26.24$26.30+0.23%$26.30$26.30314 shs$17.75 million07/08/2025$26.24$26.24$26.27$26.24314 shs$17.71 million07/07/2025$26.29$26.24-0.19%$26.26$26.24516 shs$17.71 million07/04/2025$26.29$26.29$26.29$26.29465 shs$17.75 million07/03/2025$26.24$26.29+0.19%$26.29$26.29465 shs$17.75 million07/02/2025$26.22$26.24+0.08%$26.24$26.241,121 shs$17.71 million Get the Latest News and Ratings for CPSO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Calamos S&P 500 Structured Alt Protection ETF - October and its competitors with MarketBeat's FREE daily newsletter. 07/01/2025$26.23$26.22-0.04%$26.22$26.22268 shs$17.70 million06/30/2025$26.20$26.23+0.11%$26.23$26.23268 shs$17.71 million06/27/2025$26.17$26.20+0.11%$26.20$26.18268 shs$17.69 million06/26/2025$26.12$26.17+0.19%$26.17$26.1717 shs$17.67 million06/25/2025$26.13$26.12-0.04%$26.12$26.121,000 shs$17.63 million06/24/2025$26.06$26.13+0.27%$26.13$26.08749 shs$16.33 million06/23/2025$25.98$26.06+0.31%$26.06$26.0680 shs$16.29 million06/20/2025$25.99$25.98-0.04%$25.98$25.9880 shs$16.24 million06/19/2025$25.99$25.99$25.99$25.9980 shs$16.24 million06/18/2025$25.98$25.99+0.04%$25.99$25.9980 shs$16.24 million06/17/2025$26.03$25.98-0.19%$25.98$25.98100 shs$16.24 million06/16/2025$25.95$26.03+0.31%$26.03$26.01100 shs$16.27 million Related Companies SEPT Stock Chart SZNE Stock Chart LIVR Stock Chart MAYT Stock Chart AZAA Stock Chart KSPY Stock Chart ACGR Stock Chart QRMI Stock Chart DFVE Stock Chart GNOV Stock Chart Receive CPSO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Calamos S&P 500 Structured Alt Protection ETF - October and its competitors with MarketBeat's FREE daily newsletter. 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