Data: Attom; Map: Tory Lysik/Axios Visuals
While most U.S. homeowners are sitting on a mountain of home equity after years of rising house prices, in some pockets of the country an increasing share of mortgage holders are underwater on their loans.
Why it matters: That means these folks owe more on the mortgage than their home is worth, which puts them in a horrendous financial situation if they need to sell their house.
