TY JOUR TI Principles of Investment Portfolio Construction in Crisis Conditions KW investment portfolio KW crisis KW financial market KW investment strategy KW behavioral finance KW financial instruments JO Scientific Research and Development. Economics of the Firm AU Cheluhina, N.F. AU Asyaeva, E.A. AU Myagkova, Y.Y. PY 2026 IS 15 PB INFRA-M Academic Publishing LLC.