Housing finance reform, especially if it weakens mortgage underwriting standards, could have a negative impact on private-label MBS as well as the government-sponsored enterprises’ credit risk-transfer transactions, according to a newly published report from Moody’s Investor Services. Analysts said that various reform proposals could reduce the influence that Fannie Mae and Freddie Mac have in the market and likely increase credit risk in new MBS in the short-term. Combined with a rising interest rate environment, such reform could have a credit-negative effect. Loan origination processes and the kinds of loans produced could become...