Tu, Xinshu; Wang, Jian; Long, Shunchao; Yang, Chun The study for the portfolio investment in the measurement of maximum risk. (Chinese. English summary) Zbl 0963.91060 Nat. Sci. J. Xiangtan Univ. 21, No. 2, 16-19 (1999). Summary: The essay makes a thorough and systematic study of the measurement of the maximal portfolio investment. First, the authors give a careful analysis of the problem and build a mathematical model for this kind of problem. They give a kind of effective solution – critical line. MSC: 91B28 Finance etc. (MSC2000) Keywords:expected yield; risk; critical line PDF BibTeX XML Cite \textit{X. Tu} et al., Nat. Sci. J. Xiangtan Univ. 21, No. 2, 16--19 (1999; Zbl 0963.91060)