The national U.S. mortgage delinquency rate declined in July to 3.46% of all loans, down 7% from the previous month, according to data from Black Knight. However, it rose on a yearly basis, for the first time since the Great Recession. Serious delinquencies – loans that are 90 days or more delinquent but not yet in full foreclosure – saw marked improvement in the second quarter, falling 17% from last year.