Ohio Rev. Code Ann. § 1109.35
(A)
(1) As used in division (A) of this section:
(2) A stock state bank may invest, in the aggregate, five per cent of its paid-in capital and surplus, and a mutual state bank may invest, in the aggregate, five per cent of its retained earnings, in shares issued by the following:
(B)
(1) A state bank may invest in the following:
(a) The stocks, bonds, debentures, notes, or other evidences of indebtedness of any of the following: