If, in the judgment of the Board, a loan to the insurance fund, or to the stabilization fund described in section 1790e of this title, is required at any time for purposes of this subchapter,1 the Secretary of the Treasury shall make the loan, but loans under this paragraph shall not exceed in the aggregate $6,000,000,000 outstanding at any one time. Except as otherwise provided in this subsection, section 1790e of this title, and in subsection (e) of this section, each loan under this paragraph shall be made on such terms as may be fixed by agreement between the Board and the Secretary of the Treasury.

Interest shall accrue to the Treasury on the amount of any outstanding loans made to the fund pursuant to paragraph (1) of this subsection on the basis of the average daily amount of such outstanding loans determined at the close of each fiscal year with respect to such year, and the Board shall pay the interest so accruing into the Treasury as miscellaneous receipts annually from the fund. The Secretary of the Treasury shall determine the applicable interest rate in advance by calculating the average yield to maturity (on the basis of daily closing market bid quotations during the month of September of the preceding fiscal year) on outstanding marketable public debt obligations of the United States having a maturity date of five or less years from the first day of such month of September and by adjusting such yield to the nearest one-eighth of 1 per centum.

For the purpose of making loans under paragraph (1) of this subsection, the Secretary of the Treasury is authorized to use as a public debt transaction the proceeds of the sale of any securities issued under chapter 31 of title 31, and the purposes for which securities may be issued under chapter 31 of title 31 are hereby extended to include such loans. All loans and repayments under this section shall be treated as public debt transactions of the United States.