These are mortgage loans that are "three monthly payments or more past due or in foreclosure".
The Fannie Mae serious delinquency rate peaked in February 2010 at 5.59%.
This is the lowest serious delinquency rate for Fannie Mae since September 2007.
By vintage, for loans made in 2004 or earlier (3% of portfolio), 2.73% are seriously delinquent. For loans made in 2005 through 2008 (5% of portfolio), 4.82% are seriously delinquent, For recent loans, originated in 2009 through 2018 (92% of portfolio), only 0.33% are seriously delinquent. So Fannie is still working through poor performing loans from the bubble years.
The increase late last year in the delinquency rate was due to the hurricanes - there were no worries about the overall market.
I expect the serious delinquency rate will probably decline to 0.5 to 0.7 percent or so to a cycle bottom.
Note: Freddie Mac reported earlier.