M, Bri Agustinio (2027) KOMBINASI FUZZY C-MEANS CLUSTERING DAN MODEL MARKOWITZ PADA ANALISIS KINERJA PORTOFOLIO OPTIMAL SAHAM INDEKS IDX80 = THE COMBINATION OF FUZZY C-MEANS CLUSTERING AND THE MARKOWITZ MODEL IN THE ANALYSIS OF OPTIMAL PORTFOLIO PERFORMANCE OF IDX80 INDEX STOCKS. Skripsi thesis, Universitas Hasanuddin.