Calamos S&P 500 Structured Alt Protection ETF – May (NYSEARCA:CPSM – Get Free Report) was the recipient of a significant drop in short interest during the month of January. Calamos S&P 500 Structured Alt Protection ETF – May has a 12 month low of $25.31 and a 12 month high of $28.79. Get Calamos S&P 500 Structured Alt Protection ETF - May alerts:Institutional Trading of 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. About Calamos S&P 500 Structured Alt Protection ETF – MayThe 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. Featured ArticlesReceive 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.