Purpose: The purpose of the article is to present the issue of securities as a form of investment, using the strategy of securities portfolio choice. Methods: In order to make a comprehensive analysis of the strategy of choices modeling of equity portfolio in the context of the integration of financial markets and European integration, the following research instruments were introduced: 1) analysis of the system of securities, 2) institutional approach, 3) systemic approach. In this paper legal-dogmatic method was applied primarily which helped to conduct the analysis of legal standards currently in force and security institutions. Results: The full picture of the investment decision is obtained using valuation models based on sequential valuation or sensitivity analysis. These methods, adapted to analyze portfolios of debt instruments, take into account factors relating to both changes in yield curves, as well as due to the passage of time to maturity (Szafarczyk, 2006). However, they are much more complex. The presented article is only an introduction to the topic.