Calamos S&P 500 Structured Alt Protection ETF – May (NYSEARCA:CPSM – Get Free Report) was the target of a significant decrease in short interest in January. Institutional Investors Weigh In On Calamos S&P 500 Structured Alt Protection ETF – MayA hedge fund recently raised its stake in Calamos S&P 500 Structured Alt Protection ETF – May stock. Get Calamos S&P 500 Structured Alt Protection ETF - May alerts:Calamos S&P 500 Structured Alt Protection ETF – May Trading Down 0.0%Shares of CPSM traded down $0.01 during mid-day trading on Wednesday, reaching $28.75. Calamos S&P 500 Structured Alt Protection ETF – May Company ProfileThe Calamos S&P 500 Structured Alt Protection ETF – May (CPSM) is an exchange-traded fund that trades on the NYSEARCA exchange in the United States. Recommended StoriesReceive News & Ratings for Calamos S&P 500 Structured Alt Protection ETF - May Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Calamos S&P 500 Structured Alt Protection ETF - May and related companies with MarketBeat.com's FREE daily email newsletter.