Federal regulators took extreme steps to prop up Citigroup, backing $306 billion of mainly real estate loans and securities and directly injecting money by buying $20 billion of preferred stock. The $20 billion of stock will pay an 8% dividend. Regulators will also get an additional $7 billion of preferred stock. Citigroup will basically halt dividend payments for 3 years and limit some executive pay. It will also implement the FDIC’s loan modification plan, which is close to the one it had already announced for itself.