; or (B) by purchase of outstanding obligations at market price. (3) Sale of obligations Any obligation acquired by the Fund may be sold by the Secretary of the Treasury at market price. (4) Credits to fund The interest on, and the proceeds from the sale or redemption of, any obligations held in the Fund shall be credited to and form a part of the Fund. (d) Transfers of amounts (1) In general The amounts required to be transferred to the Fund under this section shall be transferred at least monthly from the general fund of the Treasury to the Fund on the basis of estimates made by the Secretary of the Treasury. (2) Adjustments Proper adjustment shall be made in amounts subsequently transferred to the extent prior estimates were in excess of or less than the amounts required to be transferred. (e) Acceptance and use of donations The Secretary may accept and use donations to provide assistance under section 4. Amounts received by the Secretary in the form of donations shall be transferred to the Secretary of the Treasury for deposit in the Fund. The Secretary may reject a gift under this section when the rejection is in the interest of the Government. 5. Authorization of appropriations There is authorized to be appropriated to the Fund $5,000,000 for each of fiscal years 2020 through 2025. 6. Report to Congress Not later than 1 year after the date of enactment of this Act, and every 2 years thereafter, the Secretary shall submit to Congress a report on the results and effectiveness of the program carried out under this Act.