Bonds issued under section 54-17-25 may be acquired and held by banks and by savings and loan associations of this state as well as by all public trust funds. They may be issued and sold at public or private sale or by negotiation as the industrial commission may direct and the commission may make, enter into, and enforce all contracts or agreements necessary, convenient, or desirable for the purposes of the commission or pertaining to any purchase or sale of the bonds or other investments or to the performance of its duties and execution or carrying out of any of its powers under section 54-17-25.