After buying 27 percent of Citibank to keep it afloat, the federal government is ready to sell its shares for an estimated profit of $8 billion. "The Obama administration is making final preparations to sell its stake in the New York bank, according to industry and federal sources. At today's prices, the sale would net more than $8 billion, by far the largest profit returned from any firm that accepted bailout funds, and the transaction would be the second-largest stock sale in history. On paper, the government's 27 percent stake has grown in value to $33 billion. The size of the deal in the works has Wall Street buzzing. Only the stock offering by Japan's Nippon Telegraph and Telephone, which raised $36.8 billion in 1987, was larger, according to Thomson Reuters. The windfall expected from the stock sale would amount to a validation of the rescue plan adopted by government officials during the height of the financial panic, when the banking system neared the brink of collapse. A year ago, Citigroup's stock hovered around a dollar a share, and the bank's future seemed in doubt. On Friday, the stock closed at $4.31."