Zillow released a study about the different cohorts of underwater homeowners. According to their study, 48% of homeowners aged 25-29 are underwater while 51% of borrowers aged 30-34 are underwater. Of the borrowers who are underwater, the age cohort 40-50 shows the highest delinquency rates:
It is not surprising to note that the homeowners who purchased homes in 2006 and 2007 are the most likely to be underwater:
To top it off, it is good to see that homeowners are rational borrowers. The more underwater they are on their mortgages, the more likely they are to default on the loan: