Both Freddie Mac and Fannie Mae reported second-quarter earnings last week that were significantly higher than the first quarter, thanks primarily to rising interest rates. Freddie posted a net income of $4.17 billion, compared to $524 million in the first quarter. In addition to higher interest rates, the GSE attributed the increased income to a steeper yield curve and $3.1 billion in derivative gains. That gain represents a big comeback from the $2.4 billion in derivative losses in the first quarter. Fannie reported a net income of $4.64 billion, compared to $1.89 billion in the first quarter. Fannie said that number was largely driven by guaranty fee income in the second quarter.