The regulator of Fannie Mae and Freddie Mac on Wednesday said he sees better quality on new home loans backed by the two companies, which were at the center of the US housing crisis. “We’ve seen a significant improvement in the quality of new business as a result of tighter underwriting standards, and we’re seeing better performance on the loss mitigation side as a result of more aggressive modifications and other foreclosure prevention activities,” Edward DeMarco, acting director of the Federal Housing Finance Agency, said in a speech in Dallas.