Judge Paul A. Crotty in the U.S. District Court for the Southern District of New York certified a class of investors in a $2.4 billion suit against Credit Suisse for alleged misrepresentations in connection with the sale of RMBS.  Credit Suisse argued that no class should be certified because several investors were sophisticated, had large claims against Credit Suisse, and could therefore bring individual claims.  The court found, however, that "sophistication and size of certain class members are not bars . . . ."  The court also rejected Credit Suisse's argument that the proposed class was in conflict given its members' investments in different tranches of RMBS, and that the wide availability of sufficient information about the RMBS collateral meant that the investors' degree of knowledge regarding the falsity of the alleged misrepresentations should be determined on an individualized basis.  The investors are suing under Sections 11, 12, and 15 of the Securities Act.  Decision.