Although the Federal Housing Finance Agency has taken steps to ensure that the GSEs’ mortgage purchases conform to certain underwriting standards, the Finance Agency’s oversight of underwriting standards is limited and requires more attention, the FHFA’s official watchdog concluded this week. The FHFA’s Office of Inspector General found in its audit of FHFA oversight of Fannie Mae’s single-family mortgage underwriting standards that the agency lacks a formal process for reviewing underwriting standards and variances. Instead, it informally reviews and comments on Fannie’s proposed credit policy changes.