As the trend toward lenders making ever-riskier mortgage loans shows no sign of abating, Fannie Mae has decided to make several changes to its Risk Profiler default prediction system, the computer model that analyzes a borrower’s credit performance and alerts servicers to situations where credit is deteriorating. As of March 31, Risk Profiler 4.0 will predict the probability of a loan going 60+ days delinquent within six months of the score. Until now, the system…