درخت حوزه‌های تخصصی

Finding the best way to optimize the portfolio after Markowitz's 1952 article has always been and will continue to be one of the concerns of activists in the investment management industry. Researchers have come up with different solutions to overcome this problem. The introduction of mathematical models and meta-heuristic models is one of the activities that has influenced portfolio optimization in recent decades. Along with the growing use of portfolios and despite its rich literature, there are still many unanswered issues and questions in this area. Also, Iranian capital markets, as emerging markets, require native research to answer these questions and issues. The purpose of this study is to provide a useful and effective tool to assist professionals and researchers in portfolio selection theory. This study, while comprehensively reviewing the literature on the subject and the developments and expansions made in the area of portfolio selection and optimization, reviews the types of problems and optimization methods.

Purpose: The purpose of this study is to evaluate the impact of marketing strategies on entrepreneurial risks and determine their ranking. It is possible to rank marketing strategies to make the best decision to deal with the risks facing businesses. Methodology: Based on preliminary studies conducted on SMEs in Iran, a four-part questionnaire with a five-point Likert scale was provided to entrepreneurs and managers of SMEs in Tehran. Data related to 20 questionnaires were analyzed using SPSS software. Cronbach's alpha method was used to determine the reliability of the questionnaire. Finding: The results reveal that financial strategies, customer, relationships and online marketing do not have the same effect on entrepreneurial risks and we can rank them. Also, in examining the impact of business strategies on risks, the results showed that planning strategy has the greatest impact on reducing credit, operational and liquidity risks whilst relationship strategy has the greatest impact on reducing market risk. Online marketing strategy has the least observed effect on reducing credit risk and operational risk, and direct marketing strategy and financial strategy have the lowest effect on reducing liquidity and market risks. Conclusion: The effect of business strategies on reducing entrepreneurial risks is confirmed and we can rank strategies based on their impact on the risks facing businesses. Entrepreneurial risks can be reduced by using marketing strategies, and in conditions of uncertainty, the use of knowledge and expertise of marketing consultants can lead to improved decisions of entrepreneurs, resulting in sustainability and growth of businesses.