For minimising their risk levels, needs to be done is verified by forming a portfolio, whereas to obtain optimal return to optimal portfolio formed. Stock Index Sri Kehati is the object of this research. Analysis to determine optimal portfolio using single index model and stochastic dominance. The purpose of this research is to know composition of the stocks that make up the optimal portfolio, knowing level of portfolio return and find out whether there are differences in level of portfolio return formed. Type of this research is descriptive research with quantitative approach. This research was conducted at Indonesia Stock Exchange corner, Brawijaya University with a population of 34 companies and gained 18 sample. Results of calculations using the single index model yield 6 candidate shares that form the optimal portfolio, namely UNVR, KLBF, TLKM, AALI, ASII and INDF. Results of calculation with stochastic dominance produces 12 candidate shares that form the optimal portfolio, namely KLBF, ASII, TLKM, INDF, BBCA, UNVR, BBNI, BMRI, BBRI, ISAT, UNTR and MEDC. There is a difference between portfolio return is formed of two models analysis, where single index model is able to generate higher portfolio return (3.11%), compared to portfolio return with stochastic dominance (2.43%).