ANALISIS PEMBENTUKAN PORTOFOLIO OPTIMAL MENGGUNAKAN MODEL TEORI PORTOFOLIO MARKOWITZ, MODEL INDEKS TUNGGAL, METODE RVAR, DAN METODE Z DALAM PENGAMBILAN KEPUTUSAN INVESTASI DI PERUSAHAAN PERIKANAN YANG TERDAFTAR DI BEI PERIODE 2016-2018
Broadly speaking, the objectives of this study are: 1) analyzing optimal portfolio formation using 2 methods and 2 models namely Markowitz portfolio theory models and single index models as well as reward to variability (rvar) and methodz methods, 2) comparing the results of optimal portfolio formation by analyzing comparison of expected returns and risks to be received (return and risk). The analysis was carried out on fishery companies listed on the Indonesia Stock Exchange with the 2016-2018 research period, namely 3 companies with CPRO, DSFI and IIKP emintent codes. This research is a type of descriptive research with a quantitative approach. The results of the analysis of portfolio formation give an illustration: 1) in the calculation of a single index model so that the optimal share of DSFI funds is 94% with a return of 0.007 and IIKP of 6% with a return of (0.002) 2) For the reward to variability method a stock investment ranking resulting in a stock investment ranking sequentially namely DSFI, IIKP, and CPRO. 3) Z score method produces optimal stock portfolio with agragat Z score measurement where the total percentage of funds is 100% in DSFI so that the optimal portfolio 4) for the Markowitz portfolio method requires a percentage of funds by 100% on DSFI with a return of 0.05.