(a) To manage United States cash, the Secretary of the Treasury may invest any part of the operating cash of the Treasury for not more than 90 days. Investments may be made in obligations of
(1) depositaries maintaining Treasury tax and loan accounts secured by pledged collateral acceptable to the Secretary; and
(2) the United States Government.
(b) Subsection (a) of this section does not
(1) require the Secretary to invest a cash balance held in a particular account; or
(2) permit the Secretary to require the sale of obligations by a particular person, dealer, or financial institution.
(c) The Secretary shall consider the prevailing market in prescribing rates of interest for investments under subsection (a)(1) of this section.
