سرریز تلاطمی بازار نفت در بازار سهام با الگوی نوسانات تصادفی چند متغیره بیزی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه مدیریت و کارآفرینی، دانشکده علوم انسانی، دانشگاه کاشان، کاشان، ایران.

2 دانشجوی دکتری مالی-مهندسی مالی، دانشگاه یزد، یزد، ایران.

چکیده

به دلیل نوسانات چشمگیر بازار نفت و اثرگذاری آن بر شاخص‌های اقتصاد مالی ماهیت و اندازه همبستگی میان بازار نفت و بازارهای مالی از موضوعات مورد توجه محققین و سیاست‌گذارن است. ریشه این توجه در نقشی است که بازارهای مالی در توسعه کشورها دارند. در تحقیقات بسیاری ارتباط بین قیمت‌های نفت و بازار سهام با استفاده از روش‌های مختلف GARCH برداری مورد بررسی قرار گرفته است. در پژوهش حاضر از الگوی تلاطم تصادفی ساختاری بیزی چند متغیره (BMSV) معرفی شده توسط هاروی و دیگران (1994) که جایگزین قدرتمند الگوهای GARCH برداری است به منظور بررسی سرریز تلاطم بازار انرژی (بازده نفت اپک) در بازار سهام ایران استفاده شده است. نتایج نشان دهنده آن است که مدل BMSV بین بازده سهام و بازده نفت وجود سرریز تلاطمی مثبت (0.838) این دو بازار را تایید می‌نماید. بنابراین، وقوع شوک‌های مثبت در قیمت‌های نفت منجر به رشد در شاخص سهام خواهد شد. نتایج این بررسی برای سرمایه‌گذاران در بازار سهام از اهمیت بالایی در امر سرمایه گذاری برخوردار است. بخصوص آنکه مشخص شد بازده سهام با ضریب سرریز تلاطمی بازده نفت همبستگی بالایی دارد. لذا، اخبار بازار انرژی یک عامل کلیدی بسیار با اهمیت در تصمیم‌گیری‌های مربوط به سرمایه‌گذاری در بازار سهام می‌باشد. زیرا استفاده از این اطلاعات منجر به حداقل سازی ریسک سرمایه‌گذاری در بازار سهام می‌شود.

کلیدواژه‌ها

عنوان مقاله [English]

Investigating Spillover between the Oil Markets and Stock Market Volatility using Bayesian Multivariate Stochastic Volatility Model

نویسندگان [English]

  • Ali Farhadian 1
  • Moslem Nilchi 2
1 Assistant Prof., Management and Entrepreneurship Department, Kashan University, Kashan, Iran.
2 Ph.D. Candidate in Finance, Yazd University, Yazd, Iran.
چکیده [English]

One of the major concerns of researchers and policy makers in recent years is the nature and magnitude of the correlation between financial markets and the oil market. The focus is on the role that both markets play in developing countries. The relationship between oil prices and the stock market has been studied in many studies. The methods used to study this issue have been used in the GARCH approach. In this study, using the BMSV model of the multivariate econometric Volatility model introduced by Harvey and others (1994), a survey of the spillover of energy market Volatility (OPEC oil yield) in the Iranian stock market was presented. In the results, BMSV for stock returns-oil returns showed a positive Volatility spillover (0.838) in these two markets. The results of this survey are of great importance to investors in the stock market. In particular, it was found that the amount of Volatility spillover is highly correlated with oil yield. Therefore, the energy market news is a key factor in making decisions on investing in the stock market. Because the use of this information minimizes the risk of investing in the stock market.

کلیدواژه‌ها [English]

  • Energy Economy
  • Volatility
  • Bayesian Structural Multivariate Stochastic Volatility
  • Volatility spillover
  • Oil Market

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