Have a law degree from Harvard or MBA from Northwestern's Kellogg? Wall Street may want to buy your student debt.

NEW YORK (CNNMoney)

Social Finance, a company that uses crowdfunding to refinance student debt, just packaged a bunch of those loans and sold them.

It's an increasingly popular form of lending called peer-to-peer, or P2P. Firms like Social Finance (SoFi) and contemporaries Lending Club and Prosper pair people who want income with people looking for credit. It's an end run around traditional bank lending.

SoFi's niche is refinancing student loans. But not just any loans. To even be considered for getting money through SoFi, you have to have attended one of a small number of selective colleges like Harvard, New York University and Northwestern. Their alumni provide the money -- The students must also have a job lined up after graduation.

The loans tend to be debt for law school, business school and medical school. And while these grad students carry a median $77,000 in debt, they are also bringing in an average of $183,000 in salary a year. Their average FICO credit score? 776. It's another sign of how the credit market is only open to a select few.

Related: Big bond investor Bill Gross says rates will be low for years

Packaging these kinds of loans into bonds is a pretty recent phenomenon. SoFi and hedge fund Eaglewood Capital, which securitized a bunch of Lending Club consumer loans last year, are the only two companies to do so.

The big ratings agencies, who serve as a gatekeeper to the big bucks in debt markets, have largely stayed away from these types of loans. But they're starting to warm up.

Canadian firm DBRS has an investment-grade rating on bonds SoFi put together last year. And Standard & Poor's has also recently given SoFi its high-grade blessing.

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Investors help the rich pay off student loans