Presenting an industry selection model in optimizing the investment portfolio of holding companies

One of the main issues in holding companies is the issue of optimizing the investment portfolio, and the success of these companies depends on making optimal decisions at three levels of industry, product, and company selection. The aim of this research is to present an industry selection model in the issue of selecting and optimizing the investment portfolio of holding companies. In this regard, first, by analyzing the content of upstream documents, studying the literature, and applying the Delphi technique, the indicators effective on industry selection are identified, and then using the DEMETEL technique, the internal relationships between these indicators are quantified, and finally, by applying the Analytic Network Process (ANP) method, the indicators effective on industry selection and target industries are prioritized. To achieve the optimal model, a set of indicators including exchange rate changes, rapid technological changes, the effects of government laws and regulations, market outlook in terms of growth and market size, the existence of required infrastructure, the intensity of competition in the industry, ease of access to raw materials, ease of selling products, export orientation of the industry, pricing in the industry, strategic importance of the industry, knowledge-based nature of the industry, resilience against sanctions, and ease of entry into the industry were considered. The results of the study indicate that among the target industries, the oil, gas, and petrochemical, mining, and minerals, and pharmaceutical industries have the highest weight in the portfolio.