NEW YORK (Fortune) -- Back two years ago when the mortgage meltdown was heating up, we wrote an article called "Junk Mortgages Under the Microscope" dissecting a particularly wretched mortgage-backed securities issue peddled by Goldman Sachs.
We wanted to show how these complex securities really worked and how Moody's and S&P, the rating agencies, aided and abetted the process by giving two-thirds of an issue backed by ultra-risky second mortgages the same safety rating they gave to U.S. Treasury securities.
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