Debt issued by a Federal Agency or a government-sponsored enterprise (GSE) for financing purposes. These types of debentures are not backed by collateral, but by the integrity and credit worthiness of the issuer. Officially, agency debentures issued by a Federal Agency, such as the Tennessee Valley Authority, are backed by the full faith and credit of the Untied States government. Agency debentures issued by a GSE are backed only by that GSE's ability to pay. 

|||The market place appears to believe that GSE Agency debentures carry an implicit guarantee from the United States government. This is due to the GSE's direct borrowing ability from the U.S. Treasury and the importance of  the GSE’s Congressional charters and missions. The Agency debenture market is very large. At one point in the late 1990s outstanding Agency debt comprised primarily of the debt issued by Fannie Mae and Freddie Mac nearly surpassed the amount of debt issued by the U.S. Treasury. Some feel the GSE’s have an unfair funding advantage over publicly or privately held corporations, and that the amount of GSE debt and their corresponding investment portfolios pose too large of risk to the entire U.S. financial system. Others believe the role the GSEs play in promoting home ownership, for example, justify their funding advantage.