The paper is devoted to the principles of compiling a bilingual dictionary of investment terms. The terminology system in the field of the investment activity on the equity market is constantly and intensively updated with new terms. The lack of such type of dictionaries, which are essential for linguists, translators and other professionals in linguistics as well as investors and traders, makes the compiling of the dictionary very relevant. In the article, a preparatory stage of thesaurus modeling, including analysis of methodological base and identification of methods, is described. According to the parametric approach underlying the creation of a thesaurus, a number of key parameters of dictionary structures is identified. The algorithm for practical stage of working with linguistic material on the example of modeling a dictionary entry of specified dictionary is also presented.