IMPORTANT: These are mortgage loans that are "three monthly payments or more past due or in foreclosure". So it will take three months for the impact of COVID-19 to show up in this series.
The Fannie Mae serious delinquency rate peaked in February 2010 at 5.59%.
By vintage, for loans made in 2004 or earlier (2% of portfolio), 2.48% are seriously delinquent. For loans made in 2005 through 2008 (3% of portfolio), 4.11% are seriously delinquent, For recent loans, originated in 2009 through 2018 (95% of portfolio), only 0.35% are seriously delinquent. So Fannie is still working through a few poor performing loans from the bubble years.
I expect the serious delinquency rate will increase in a few months due to COVID-19.
Note: Freddie Mac reported earlier.