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  Citation Number 3
 Views 37
 Downloands 8
İSLAMİ ENDEKSLERDEKİ PİYASA ETKİNLİĞİNİN UZUN HAFIZA MODELLERİYLE TEST EDİLMESİ: BİST UYGULAMASI
2021
Journal:  
Finansal Araştırmalar ve Çalışmalar Dergisi
Author:  
Abstract:

Etkin piyasa, fiyatların rassal yürüyüş özelliğinden dolayı geçmişteki fiyat değişimlerini dikkate alarak gelecekteki fiyatların tahmin edilemediği böylece fiyatlarda uzun hafızanın olmadığı piyasadır. Bu çalışmada, portföy çeşitlendirmesi açısından öneme sahip olan İslami endekslerin piyasa etkinliği uzun hafıza modelleriyle test edilmeye çalışılmıştır. BİST’te yer alan Katılım-30, Katılım-50 ve Model Portföy Endeksleri’nin yayınlandığı tarihten itibaren 11.04.2019’a kadar olan günlük getiri verileri dikkate alınarak getiri ve volatilite serilerinde uzun hafıza etkisi ARFIMA-FIGARCH modeli kullanılarak araştırılmıştır. Çalışmanın sonucunda, endekslerin getiri serilerinde kısa hafıza özelliği, volatilite serilerinde uzun hafıza özelliği sergilediği bulgusuna ulaşılmıştır. Türkiye’de yer alan İslami endekslerin incelenen dönem itibariyle uzun hafıza özelliğine sahip olması, bu endekslerin zayıf formda etkin piyasa yapısından uzaklaştıklarını göstermektedir.

Keywords:

Testing the market effectiveness of the Islamic Index with long-term models: BIST application
2021
Author:  
Abstract:

The effective market is the market where future prices are unpredictable, taking into account past price changes due to the price’s racal walking feature; therefore, there is no long memory in prices. In this study, the market effectiveness of the Islamic index, which is important in terms of portfolio diversification, was tried to be tested with long memory models. The daily return data from the date of publication of the Participation-30, Participation-50 and Model Portfolio Indices included in the BIST to 11.04.2019 were taken into account and the long memory effect in the return and volatility series was studied using the ARFIMA-FIGARCH model. The study found that the short memory feature in the return series of indicators, the long memory feature in the volatility series, was found. The fact that the Islamic Indices in Turkey have a long memory character from the study period shows that these indices are away from the effective market structure in a weak form.

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0
2021
Author:  
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Finansal Araştırmalar ve Çalışmalar Dergisi

Journal Type :   Uluslararası

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Finansal Araştırmalar ve Çalışmalar Dergisi