They cite the numbers in "real terms", which would mean inflation adjusted: > The average price of American homes, in real terms, is now the highest it's ever been Of course, you really need to be looking at mortgage rates to understand housing affordability: http://www.freddiemac.com/pmms/pmms30.html July 2021 average 30-year mortgage rate: 2.87% (with 0.7 points) 2008 12-month average 30-year mortgage rate: 6.03% (…
If interest rates rise, or something else happens that reduces the value of the property, then that $500,000 mortgage might be against a house worth less than $500,000. At that point people have to start playing chicken with the banks again, trying to mitigate the losses with strategic defaults.