Fannie Mae and Freddie Mac have made far fewer repurchase demands on loans sold to the GSEs over the past three years, but their regulator says the enterprises will continue to push lenders to buy back defective loans. A new Inside the GSEs analysis of repurchase activity by the GSEs reveals that the share of loans subject to buyback demands slowed to a trickle in 2009, when just 0.25 percent of mortgages purchased or securitized by Fannie and Freddie were subject to such requests.