RealEstateEconomyWatch.com

More than 11.3 million, or 24 percent, of all residential properties with mortgages, were in negative equity at the end of the fourth quarter of 2009, up from 10.7 million and 23 percent at the end of the third quarter of 2009. 

An additional 2.3 million mortgages were approaching negative equity at the end of last year, meaning they had less than five percent equity.  Together, negative equity and near-negative equity mortgages accounted for nearly 29 percent of all residential properties with a mortgage nationwide, according to the latest report from First American CoreLogic.

Negative equity, or “underwater” or “upside down,” means that borrowers owe more on their mortgage than their homes are worth. Negative equity can occur because of a decline in value, an increase in mortgage debt or a combination of both.

Negative equity continues to be concentrated in five states: Nevada, which had the highest percentage negative equity with 70 percent of all of its mortgaged properties underwater, followed by Arizona (51 percent), Florida (48 percent), Michigan (39 percent) and California (35 percent). Among the top five states, the average negative equity share was 42 percent, compared to 15 percent for the remaining 45 states. In numerical terms, California (2.4 million) and Florida (2.2 million) had the largest number of negative equity mortgages accounting for 4.6 million, or 41 percent, of all negative equity loans.

The net increase in the number of negative equity borrowers in Q4 2009 was 620,000, with the largest percentage increases occurring in Nevada, Georgia and Arizona. Among the states with the highest negative equity shares, California had the smallest increase in the negative equity share, which only rose 0.4 percent to 35.1 percent. In numerical terms, Florida had the largest increase in the number of negative equity borrowers rising by more than 141,000, followed by Georgia (65,000) and Illinois (55,000).

The rise in negative equity is closely tied to increases in pre-foreclosure activity and is a major factor in changing homeowners’ default behavior. Once negative equity exceeds 25 percent, or the mortgage balance is $70,000 higher than the current property values, owners begin to default with the same propensity as investors.