The interest and principal payments we expect to receive on the Agency MBS in which we invest are guaranteed by Fannie Mae, Freddie Mac or Ginnie Mae. Principal and interest payments on Ginnie Mae certificates are directly guaranteed by the U.S. government. Principal and interest payments relating to the securities issued by Fannie Mae and Freddie Mac are only guaranteed by each respective GSE.
In September 2008, Fannie Mae and Freddie Mac were placed into the conservatorship of the FHFA, their federal regulator, pursuant to its powers under The Federal Housing Finance Regulatory Reform Act of 2008, a part of the Housing and Economic Recovery Act of 2008 (the "Recovery Act"). In addition to the FHFA becoming the conservator of Fannie Mae and Freddie Mac, the U.S. Treasury entered into Preferred Stock Purchase Agreements ("PSPAs") with the FHFA and have taken various actions intended to provide Fannie Mae and Freddie Mac with additional liquidity in an effort to ensure their financial stability. In September 2019, the FHFA and the U.S. Treasury agreed to modifications to the PSPAs that will permit Fannie Mae and Freddie Mac to maintain capital reserves of $25 billion and $20 billion, respectively. As of September 30, 2020, Fannie Mae and Freddie Mac had retained equity capital of approximately $21 billion and $14 billion, respectively. In December 2020, a final rule was published in the federal register regarding GSE capital framework (the "December rule"), which requires Tier 1 capital in excess of 4% (approximately $265 billion) and a risk-weight floor of 20% for residential mortgages. On January 14, 2021, the U.S. Treasury and the FHFA executed letter agreements (the "January agreement") allowing the GSEs to continue to retain capital up to their regulatory minimums, including buffers, as prescribed in the December rule. These letter agreements provide, in part, (i) there will be no exit from conservatorship until all material litigation is settled and the GSEs have common equity Tier 1 capital of at least 3% of their assets, (ii) the GSEs will comply with the FHFA's regulatory capital framework, (iii) higher-risk single-family mortgage acquisitions will be restricted to current levels, and (iv) the U.S. Treasury and the FHFA will establish a timeline and process for future GSE reform. On September 14, 2021, the U.S. Treasury and the FHFA suspended certain policy provisions in the January agreement, including limits on loans acquired for cash consideration, multifamily loans, loans with higher risk characteristics and second homes and investment properties. On September 15, 2021, the FHFA announced a notice of proposed rulemaking for the purpose of amending the December rule to, among other things, reduce the Tier 1 capital and risk-weight floor requirements.
Shortly after Fannie Mae and Freddie Mac were placed in federal conservatorship, the Secretary of the U.S. Treasury suggested that the guarantee payment structure of Fannie Mae and Freddie Mac in the U.S. housing finance market should be re-examined. The future roles of Fannie Mae and Freddie Mac could be significantly reduced and the nature of their guarantees could be eliminated or considerably limited relative to historical measurements. The U.S. Treasury could also stop providing credit support to Fannie Mae and Freddie Mac in the future. Any changes to the nature of the guarantees provided by Fannie Mae and Freddie Mac could redefine what constitutes an Agency MBS and could have broad adverse market implications. If Fannie Mae or Freddie Mac was eliminated, or their structures were to change in a material manner that is not compatible with our business model, we would not be able to acquire Agency MBS from these entities, which could adversely affect our business operations. Such changes would likely have a similar impact on the business operations of Orchid, which could adversely affect the value and performance of our investment in Orchid common stock and the amount of management fees and expense reimbursements we receive from Orchid.
On June 23, 2021, the Supreme Court ruled in Collins v. Mnuchin, a case presenting a question of the constitutionality of the FHFA and its director's protection from being replaced at will by the President. The Supreme Court held that the FHFA did not exceed its powers or functions as a conservator under the Recovery Act, and that the President may replace the director at will. On June 23, 2021, President Biden appointed Sandra Thompson as acting director of the FHFA.