From the Document: "In October 2008, the Emergency Economic Stabilization Act of 2008 (division A of Public Law 110-343) established the Troubled Asset Relief Program (TARP) to enable the Department of the Treasury to promote stability in financial markets through the purchase and guarantee of 'troubled assets.' Section 202 of that legislation, as amended, requires annual reports from the Office of Management and Budget (OMB) on the costs of the program. The law also requires the Congressional Budget Office to submit its own report within 45 days of the issuance of OMB's report each year. CBO's assessment must discuss three elements:  The costs of purchases and guarantees of troubled assets,  Information CBO collects and the valuation methods it uses to calculate those costs, and  The program's effects on the federal budget deficit and debt."
Congressional Budget Office: http://www.cbo.gov/