Miss. Code Ann. § 55-23-27

All bonds and interest coupons issued under the provisions of Sections 55-23-21 through 55-23-43 shall be and are hereby declared to have all the qualities and incidents of negotiable instruments under the provisions of the Uniform Commercial Code and in exercising the powers granted by Sections 55-23-21 through 55-23-43, the board and/or State Bond Commission shall not be required to and need not comply with the provisions of the Uniform Commercial Code. Such bonds and income therefrom shall be exempt from all taxation within the State of Mississippi.