The efficient boundary of the stocks combination investment and the influence on it by the risk-free investment
Xiaoyu Wang · 2004
Through proceeding from the stocks combination investment for dispering risk, the author discusses and finds out the efficient boundary of stocks combination investment.Based on study of the efficient boundary of the portfolio selection allowing short selling,the paper discusses the influence on the efficient boundary of the portfolio selection by risk-free investment.The mathematic formulation and other results of the efficient boundary recombined by risk-free investment and the risk portfolio selection are given.