Tarina, H. D. N., R. Sembel, and J. Sidharta. “ORMATION OF OPTIMAL STOCK PORTFOLIO USING SINGLE INDEX MODEL CUT-OFF RATE METHODE, MARKOWITZ MODEL, AND CAPITAL ASSET PRICING MODEL IN 11 INDUSTRIAL SECTORS LISTED ON THE INDONESIA STOCK EXCHANGE 2016-2020””. Fundamental Management Journal, Vol. 6, no. 2, Oct. 2021, pp. 51 -65, doi:10.33541/fjm.v6i2.3415.