based hedge-fund firm Magnetar Capital LLC helped to craft, according to people familiar with the matter. Mizuho and Magnetar declined to comment. Magnetar was involved in helping create some of the CDOs scrutinized by the SEC, including a $1.1 billion deal called Squared that was sold by J.P. Morgan Ch

debt obligation that Illinois-based hedge-fund firm Magnetar Capital LLC helped to craft, according to people familiar with the matter. Mizuho and Magnetar declined to comment. Magnetar was involved in helping create some of the CDOs scrutinized by the SEC, including a $1.1 billion deal called Squared