The Office of Federal Housing Enterprise Oversight lowered the regulatory boom on Freddie Mac this week, imposing the heaviest fine ever administered by a safety and soundness regulator and threatening to limit the firm’s portfolio growth if Freddie fails to improve its disclosures. The agency report casts more blame on Freddie Mac’s board of directors as well as managers still at the GSE than did an earlier probe commissioned by Freddie’s board. OFHEO cited