TY JOUR TI COMPARATIVE ANALYSIS OF THE PRINCIPLES OF FORMATION AND RISKS OF INVESTMENT PORTFOLIOS OF STOCKS, BONDS, OPTIONS, FUTURES, DIGITAL FINANCIAL ASSETS IN RUSSIA KW valuation KW investments KW shares KW bonds KW options and futures KW digital financial assets. JO Scientific Bulletin: finance, banking, investment AU Bondarenko, D.V. PY 2025 IS 0 PB V.I. Vernadsky Crimean Federal University