RBC Capital downgrades NASDAQ:CSGS from "Outperform" to "Sector Perform" due to concerns over its proposed sale to NEC Corporation.Class Action Attorney Juan Monteverde is investigating the fairness of the proposed sale, assessing if it benefits CSGS shareholders.CSGS's stock hits a yearly high of $79.20, marking a significant growth amidst ongoing sale discussions and investigations.CSG Systems International, Inc. (NASDAQ:CSGS) is a company that provides business support solutions, primarily for the commun ...