More than a quarter of car buyers still owed an average of $4,257 more than their vehicles were worth. Unlike a home, which can increase in value, a new car loses 11 percent of its value on average the minute it’s driven off the dealership’s lot. After five years of depreciation, the same car has lost two-thirds of its value and is typically worth just 37 percent of its original purchase price. The problem is that many car loans now exceed five years. Although the longer loans mean lower monthly payments, they leave many owners with negative equity in a...