Calamos Investments has released monthly portfolio data for April including asset allocation, quality allocation, representative holdings, sector weightings and other fund characteristics for Calamos Convertible Opportunities and Income Fund (NYSE: CHI), Calamos Convertible and High Income Fund (NYSE: CHY), Calamos Strategic Total Return Fund (NYSE: CSQ), Calamos Global Total Return Fund (NYSE: CGO) and Calamos Global Dynamic Income Fund (NYSE: CHW).