Magnetar Capital is a hedge fund based in Evanston, Illinois. The firm was founded in 2005 and invests in fixed income, energy, quantitative and event-driven strategies. The firm was actively involved in the collateralized debt obligation (CDO) market during the 2006–2007 period. In some articles critical of Magnetar Capital, the firm's arbitrage strategy for CDOs is described as the "Magnetar trade". The company has additional offices in New York City, London, England, Houston, Texas, and Minneapolis, Minnesota.