جستجوی مقالات مرتبط با کلیدواژه "fractal market hypothesis" در نشریات گروه "مالی"
تکرار جستجوی کلیدواژه «fractal market hypothesis» در نشریات گروه «علوم انسانی»-
The present study models the risk of investment in the petrochemical industry considering the impacts of exchange rate (US dollar to Iran''''s Rial) movements using the time series data from November 2008 to March 2019 and ARFIMA-FIGARCH framework. The empirical results prove the existence of the Fractal Market Hypothesis, FMH, and the Long Memory property in both the risk and return of the petrochemical stock index. These findings can be culminated in reaching a reliable and significant model to evaluate the investment risk in the petrochemical industry. In line with this, to analyze the idea whether considering the exchange rate movements matter for assessing the risk management in the petrochemical industry, the effects of exchange rate movements as a crucial source of systematic risk in Iran has been taken into consideration in the process of modelling the risk of investment in that industry. Our results demonstrate that the exchange rate movements have had a direct and significant effect on the investment risk of that industry so that if, on average, one percent change occurs in the exchange rate, the investment risk in this industry changes by 57% in the same direction.
Keywords: Petrochemical Industry, Exchange Rate Movements, ARFIMA-FIGARCH framework, Long Memory property, Fractal Market Hypothesis -
The present study models the risk of investment in the petrochemical industry considering the impacts of exchange rate (US dollar to Iran's Rial) movements using the time series data from November 2008 to March 2019 and ARFIMA-FIGARCH framework. The empirical results prove the existence of the Fractal Market Hypothesis, FMH, and the Long Memory property in both the risk and return of the petrochemical stock index. These findings can be culminated in reaching a reliable and significant model to evaluate the investment risk in the petrochemical industry. In line with this, to analyze the idea whether considering the exchange rate movements matter for assessing the risk management in the petrochemical industry, the effects of exchange rate movements as a crucial source of systematic risk in Iran has been taken into consideration in the process of modelling the risk of investment in that industry. Our results demonstrate that the exchange rate movements have had a direct and significant effect on the investment risk of that industry so that if, on average, one percent change occurs in the exchange rate, the investment risk in this industry changes by 57% in the same direction.Keywords: Petrochemical Industry, Exchange Rate Movements, ARFIMA-FIGARCH framework, Long Memory property, Fractal Market Hypothesis
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در ادبیات علمی فرض های مختلفی در خصوص بازار مطرح شده است از جمله، از یک طرف افرادی وجود دارند که بازار را کاملا تصادفی تصور می کنند و از طرف دیگر افرادی که بازار را کاملا قطعی فرض مینمایند و خواهیم دیدکه هر دو گروه تا حد مشخصی درست می گویند ولی نتایجی که از همپوشانی هر دو تفکر ناشی می شود متفاوت از انتظارات هر دو گروه است. همچنین، همانطور که می دانیم بازار سرمایه به خوبی توسط توزیع نرمال و گشت تصادفی تشریح نمی شود و فرضیه بازار کارا به عنوان فرضیه ای غالب برای عملکرد بازار است.
در این پژوهش با مروری کوتاه بر فرضیه بازار کارا و بیان ناکارآمدی آن، فرضیه بازار فرکتال به عنوان جایگزینی برای این فرضیه مطرح می شود. بر اساس فرضیه بازار فرکتال خواهیم دیدکه چرا ساختار آماری این بازار با بازارکارا شباهتی وجود دارد. همچنین با به کارگیری روش R/S و آزمون این روش، فرضیات بازار فرکتال و کارآمدی آن قابل اثبات است. نتایج مطالعه نشان می دهد فرضیات بازار فرکتال را می توان به عنوان جایگزینی برای فرضیه بازارکارا در نظر گرفت. همچنین در مدل قیمت گذاری دارائی های سرمایه ای (CAPM) که براساس فرضیه بازارکارا شکل گرفته است، تجدیدنظر کرد.کلید واژگان: بازارکارا, بازارناکارا, بازارفرکتال, آنالیز فرکتالی, آنالیز بازده با مقیاس مجدد (R, S)This paper deals with this issue, which can be summarized as the conflict between randomness and determinism. On the one hand, there are market analysts who feel that the market is perfectly deterministic; on the other, there is a group who feel that the market is completely random. We will see that there is a possibility that both are right to a limited extent. But what comes out of these partial truths is quite different from the outcome either group expects. We will use R/S analysis, or rescaled range analysis. R/S analysis can distinguish fractal from other types of time series, revealing the self-similar statistical structure. This structure fits a theory of market structure called the Fractal Market Hypothesis.. This reconciliation ties directly into the concept of local randomness and global determinism.
One of the most important area that we focun on is capital market distributions. capital markets are not well described by the normal distribution and random walk theory. Yet, the Efficient Market Hypothesis continues to the dominant paradigm for how the markets work. Standard statistical analysis begins by assuming that the system under study is primarily random; that is, the causal process that created the time series has many component parts, or degrees of freedom, and the interaction of those components is so complex that a deterministic explanation is not possible. Only probabilities can help us understand and take advantage of the process. The underlying philosophy implies that randomness and determinism cannot coexist.Keywords: Rescale Range Analysis, Fractal Market Hypothesis, Efficient Market Hypothesis, local randomness, global determinism
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