Mont. Code Ann. § 32-2-934

A director, officer, agent, or other employee of a mutual association may not, directly or indirectly for the person's own benefit, purchase, sell, or be interested in the purchase or sale of any obligation of the mutual association or of any assets of the mutual association for a sum less than the amount that appears on the face of the obligation or obligations purchased or sold. A person violating the provisions of this section shall, in addition to the general penalties of this chapter, forfeit to the state twice the nominal amount or face value of the obligations or assets purchased or sold.