...When the crash came, nearly all of these securities became worthless, a loss of an estimated $40 billion paid by investors, the investment banks who helped bring them into the world, and, eventually, American taxpayers.
Yet the hedge fund, named Magnetar for the super-magnetic field created by the last moments of a dying star, earned outsized returns in the year the financial crisis began.
How Magnetar pulled this off is one of the untold stories of the meltdown. Only a small group of Wall Street insiders was privy to what became known as the Magnetar Trade <2> <2>. Nearly all of those approached by ProPublica declined to talk on the record, fearing their careers would be hurt if they spoke publicly. But interviews with participants, e-mails <3> <3>, thousands of pages of documents and details about the securities that until now have not been publicly disclosed shed light on an arcane, secretive corner of Wall Street.
According to bankers and others involved, the Magnetar Trade worked this way: The hedge fund bought the riskiest portion of a kind of securities known as collateralized debt obligations -- CDOs. If housing prices kept rising, this would provide a solid return for many years. But that's not what hedge funds are after. They want outsized gains, the sooner the better, and Magnetar set itself up for a huge win: It placed bets that portions of its own deals would fail. Along the way, it did something to enhance the chances of that happening, according to several people with direct knowledge of the deals. They say Magnetar pressed to include riskier assets in their CDOs that would make the investments more vulnerable to failure. The hedge fund acknowledges it bet against its own deals but says the majority of its short positions, as they are known on Wall Street, involved similar CDOs that it did not own. Magnetar says <4> <4> it never selected the assets that went into its CDOs.
...At least nine banks helped Magnetar hatch deals. Merrill Lynch, Citigroup and UBS all did multiple deals with Magnetar. JPMorgan Chase, often lauded for having avoided the worst of the CDO craze, actually ended up doing one of the riskiest deals with Magnetar, in May 2007, nearly a year after housing prices started to decline. According to marketing material and prospectuses <8> <8>, the banks didn't disclose to CDO investors the role Magnetar played.
Many of the bankers who worked on these deals personally benefited, earning millions in annual bonuses.
http://www.propublica.org/feature/all-the-magnetar-trade-how-one-hedge-fund-helped-keep-the-housing-bubble