The legacy of toxic subprime and Alt A MBS from Countrywide Financial continued to spread last week, with a California appeals court deciding to allow a class action involving a number of pension funds and other institutional investors against the lender to proceed. The plaintiffs allege that Countrywide and a number of its subsidiaries, officers and U.S. investment banks violated the Securities Act of 1933 by making materially false and misleading statements in over 450 prospectus supplements relating to the issuance of more than $300 billion in subprime and Alt A securities. Specifically, plaintiffs allege the defendants misrepresented the quality of...