Analysts warn that just as investors didn't comprehend the risk inherent in some of the more exotic home mortgages in recent years, they aren't considering how risky these car loans are. If longer loan terms allow debt on the loans to grow too large, many drivers may simply default, leading to expensive repossessions.
And even those who keep paying their bills may reach a point, like Gerhardt, where they simply can't afford another car. That could send vehicle sales down the drain, a nightmare scenario for an industry that has already taken a hit this year from slower consumer spending and higher gas prices.
It could also lead to serious losses among financial institutions that have invested in car debt. Among securitized auto loans, two-thirds have terms longer than 60 months, a fact that Standard & Poor's, which rates auto debt for sale on the secondary market, calls a "credit concern."
This month, S&P reviewed its ratings on $113.5 billion in auto loan securities it rated in the last two years out of concerns over growing losses. It didn't make any downgrades but predicted that "rising losses will continue into 2008 across all segments of the auto loan market."
S&P has found that delinquencies of more than 60 days on car loans issued this year to borrowers with the best credit are up 20% compared to those issued last year, while delinquencies on loans issued this year to subprime borrowers increased by 16%. Delinquency rates on car loans are still far lower than on mortgages, but there is growing concern in the financial services industry. Indeed, Tom Webb, chief economist of used-auto analyst Manheim Consulting, said he expects the tally for 2007 repossessions to be up by 10%.
Mark Pregmon, executive vice president for consumer lending at SunTrust Bank, is among the concerned. "Any time you extend the maturity of the loan, you take on more risk. The question is whether there's enough assessment of that extra risk," he said. "Obviously, it's a problem. It's a house of cards."
In the 1970s and '80s, car loans hovered between 36 and 48 months, and drivers typically kept their cars longer than the life of the loan. A number of factors changed that.
One key was interest rates, which fell from a high of 17.8% in the early 1980s to lower than 5% today, according to the Federal Reserve. Another was affordability. According to an index tracked by Comerica Bank, cars have steadily gotten more affordable -- as compared to median family income -- since the late 1990s.