Concluding work in master degree, 72 pages, 7 pictures, 31 tables, 64 literary sources,5 appendixes, Lithuanian language. Research object – investments to the stock in stock market. The subject of research – processes of portfolio formation. Objective of the work – to form stock portfolio consistent with investor’s aims from the point of view of benefit and risk after analysing theoretical aspects of investment to the stock and investment portfolio formation and research of the investment environment in Lithuania. Tasks: 1) to analyse the aims and methods of investment; 2) to investigate stock types, their advantages and disatvantages; 3) to investigate risk types, occurring in process of investment; 4) to analyse the methodology of stock portfolio formation; 5) to explore functioning features of stock market; 6) to perform the research on investment environment in Lithuania; 7) to perform the research of stock portfolio formation in Lithuania. Methods of the research: analysis of literature sources, logical analysis and synthesis, induction and deduction, statistical methods. In a first section of this work theoretical aspects of investment to the stock are presented, in a second section research of investment environment is performed, in a third section of this work, based on the results made in the first and second sections of the work, experimental stock portfolio is formed, analysis and evaluation of expected and actual results... [to full text]