Any of the following is acceptable collateral for self deposits or affiliate deposits under § 150.310:

(a) Direct obligations of the United States, or other obligations fully guaranteed by the United States as to principal and interest.

(b) Readily marketable securities of the classes in which state-chartered corporate fiduciaries are permitted to invest fiduciary funds under applicable state law.

(c) Other readily marketable securities as the OCC may determine.

(d) Surety bonds, to the extent they provide adequate security, unless prohibited by applicable law.

(e) Any other assets that qualify under applicable state law as appropriate security for deposits of fiduciary funds.