Setiap investor dalam investasi mengharapkan mendapatkan keuntungan maksimal dan risiko minimal. Hal-hal yang bisa dilakukan bisa dilakukan yaitu dengan membentuk portofolio yang optimal. Penentuan portofolio optimal dapat dilakukan dengan model indeks tunggla dan model sharpe. Tujuan dari penelitian ini adalah untuk mengetahui komposisi portofolio optimal berdasarkan model indeks tunggal dan model sharpe pada saham sektor properti dan real estat yang terdaftar di Bursa Efek Indonesia (BEI). Teknik pengambilan sampel dilakukan dengan metode purposive sampling. Hasil analisis dari portofolio optimal berdasarkan model single index didapatkan 3 perusahaan yang termasuk dalam pendirian portofolio optimal yaitu PT. Cowell Development Tbk (92%), PT. Gowa Makassar Tourism Development Tbk (6%) dan PT. Bumi Citra Permai Tbk (2%). Sedangkan pada model sharpe ada 6 perusahaan yang masuk dalam pembentukan portofolio optimal PT. Roda Vivatex Tbk (45.801%), PT. Metropolitan Kentjana Tbk (24.678%), PT. Cowell Development Tbk (20,743%), PT. Bumi Serpong Damai Tbk (16.806%), PT. Plaza Indonesia Realty Tbk (4,634%) dan PT. Lippo Karawaci Tbk (0,011%). Kesimpulan yang diperoleh dari penelitian ini adalah investasi properti dan investor real estat memilih PT. Cowell Development Tbk karena walaupun menggunakan model perhitungan yang berbeda selalu menghasilkan proporsi yang positif. Kata kunci: portofolio optimal, model indeks tunggal dan model sharpe

Every investor in investing expects to gain maximum profit and minimal risk. The things that can be done can be done that is by forming an optimal portfolio. Optimal portfolio determination can be done with tunggla index model and sharpe model. The purpose of this study is to know the optimal portfolio composition based on single index model and sharpe model in property and real estate sector stock listed in Indonesia Stock Exchange (IDX). Sampling technique is done by purposive sampling method. Result of analysis from optimal portofolio based on single index model got 3 companies which included in establishment of optimal portofolio that is PT. Cowell Development Tbk (92%), PT. Gowa Makassar Tourism Development Tbk (6%) and PT. Bumi Citra Permai Tbk (2%). While in the sharpe model there are 6 companies that are included in the establishment of an optimal portfolio of PT. Wheels Vivatex Tbk (45,801%), PT. Metropolitan Kentjana Tbk (24,678%), PT. Cowell Development Tbk (20.743%), PT. Bumi Serpong Damai Tbk (16.806%), PT. Plaza Indonesia Realty Tbk (4,634%) and PT. Lippo Karawaci Tbk (0.011%). The conclusions obtained from this research is investing property and real estate investors choose PT. Cowell Development Tbk because although using different calculation models always produce a positive proportion. Keywords: optimal portfolio, single index model and sharpe modl

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