The Housing Bubble and Mortgage Debt as a Percent of GDP

In a 2005 post, I included a graph of household mortgage debt as a percent of GDP. Several readers asked if I could update the graph.

First, from February 2005 (17 years ago!):

The following chart shows household mortgage debt as a % of GDP. Although mortgage debt has been increasing for years, the last four years have seen a tremendous increase in debt. Last year alone mortgage debt increased close to $800 Billion - almost 7% of GDP. ...

Many homeowners have refinanced their homes, in essence using their homes as an ATM.

It wouldn't take a RE bust to impact the general economy. Just a slowdown in both volume (to impact employment) and in prices (to slow down borrowing) might push the general economy into recession. An actual bust, especially with all of the extensive sub-prime lending, might cause a serious problem.

And a serious problem is what happened!

The second graph shows household mortgage debt as a percent of GDP through Q3 2021 (based on the Fed’s Flow of Funds report).

The "bubble" is pretty obvious on this graph, and the sharp increase in mortgage debt was one of the warning signs.

The blip up in Q2 2020 was related to the collapse in GDP rather than an increase in mortgage debt. With the recent house price increases, some people are worried about a new housing bubble - but mortgage debt isn't a concern and lending standards are much better now than during the bubble.

The third graph, from the NY Fed’s Quarterly Report on Household Debt and Credit on mortgage originations by credit scores is one indicator that lending has been reasonably solid.

From the NY Fed:

The credit scores of newly originated mortgages had increased in the early part of the pandemic, but have declined in recent

quarters, yet remain very high and reflect a continuing high quality of newly opened mortgages as well as a higher share of refinances.

I’ll have an update on housing supply and demand tomorrow.