Although they’re backed mainly by installment contracts signed by people who can’t even qualify for a credit card, most of these bonds have been rated investment grade. Many have received the highest rating: AAA.

That’s because rating firms believe that with tens of thousands of loans lumped together, the securities are safe even if some of the loans prove worthless.

Some analysts worry that the rush to securitization could lead to careless lending by dealers eager to sell more loans, as happened with many mortgage-backed bonds.

Surely, Mr. Market is too smart now to let such a thing happen, right?

Nice work by Bensinger and the LA Times of digging into this business and showing us how it’s financed by big money.

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Ryan Chittum is a former Wall Street Journal reporter, and deputy editor of The Audit, CJR's business section. If you see notable business journalism, give him a heads-up at rc2538@columbia.edu. Follow him on Twitter at @ryanchittum.