A report from Citi Global Perspectives and Solutions, titled "Education: Back to Basics" says student loan default and delinquency rates are down from 14.7% in 2013 yet still high at approximately 11% which is comparable to peak mortgage crisis delinquency rates of 11.5%; report also provides additional comparisons of the current state of the student loan market to the mortgage market crisis; notes that the student loan market overall is $1.41 trillion compared to $8.6 trillion for mortgages, making high student loan defaults less significant than a mortgage market crisis. Source
