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ETKİN PİYASALAR HİPOTEZİ: BİST UYGULAMASI
2020
Journal:  
Asos Journal
Author:  
Abstract:

Etkin piyasalar menkul kıymet fiyatlarının elde edilebilir tüm bilgileri yansıttığı piyasalar olarak tanımlanmaktadır. Etkin Piyasalar Hipotezi (EPH) halka açık yayınlanan bilgilerin gecikmeden finansal varlık fiyatlarına yansıtıldığını ve gelecekteki her bir finansal aracın fiyatını olumlu veya olumsuz etkileyecek bilgilerin varlığın bugünkü fiyatına yansıtılacağını ileri sürmektedir. Hipoteze göre piyasa süreçleri bilgiyi rasyonel olarak değerlendirmekte, ilgili bilgi göz ardı edilmemekte ve sistematik hatalar yapılmamaktadır. Bu çalışmada 2018-2020 yıllarında BİST Ulusal 100 Endeksi değişiklikleri incelenmiştir. BİST Endeks değişiklikleri periyodik olarak üçer aylık dönemlerde gerçekleştirilmektedir. Çalışma sonuçlarına göre özellikle endeks değişikliği duyurusunu takip eden 10 günlük süreçte, endekse yeni dahil edilen hisse senetleri çerçevesinde normal üstü getiri (toplam % 210) elde edilebilmektedir. Bu sonuç etkin bir piyasada normal üstü getiri elde edilemez varsayımı ile uyuşmamaktadır. Çalışma sonuçlarına göre endeks değişiklikleri hisse senetleri ile ilgili ortaya yeni bilgi çıkarmaktadır. Yatırımcılar piyasaya ulaşan yeni bilgi çerçevesinde yatırım kararlarını almakta veya gözden geçirmektedirler.

Keywords:

Hypothesis of the Effect: Bist Application
2020
Journal:  
Asos Journal
Author:  
Abstract:

Active markets are defined as markets where the value prices reflect all available information. The Active Markets Hypothesis (EPH) suggests that the publicly published information will be reflected in the financial asset prices without delay and that the information that will have a positive or negative impact on the price of each future financial instrument will be reflected in the current asset price. According to the hypothesis, market processes rationally assess information, relevant information is not neglected and systemic errors are not made. This study examined the changes in the BIST National 100 Index in 2018-2020. The changes are periodically made in three-month period. According to the results of the study, in the course of 10 days, especially after the index change announcement, the newly included shareholders in the index can obtain a over-normal return (210% in total). This result is not consistent with the assumption that the normal output is not achieved in an effective market. According to the results of the study, the index changes reveal new information about the shares. Investors are making or reviewing their investment decisions in the framework of new information coming to the market.

Keywords:

Efficient Markets Hypothesis: Bist Application
2020
Journal:  
Asos Journal
Author:  
Abstract:

Efficient markets are defined as the markets where the securities prices reflect all available information. The Efficient Markets Hypothesis (EMH) suggests that publicly disclosed information is reflected in financial asset prices without delay and that information that will affect the price of each future financial instrument, either positively or negatively, will be reflected in the current price of the asset. According to the hypothesis, market processes evaluate information rationally, related information is not ignored and systematic errors are not made. In this study, BIST National 100 Index changes were examined in 2018-2020. BIST Index changes are periodically performed quarterly. According to the results of the study, in the 10-day period following the announcement of the index change, the above-normal return (210% in total) can be obtained within the framework of the newly added stocks. This result does not comply with the assumption that an abnormal return cannot be obtained in an efficient market. According to the results of the study, changes in index reveal new information about stocks. Investors make or review investment decisions within the framework of new information that reaches the market.

Keywords:

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Asos Journal

Field :   Eğitim Bilimleri; Filoloji; Güzel Sanatlar; Hukuk; İlahiyat; Sosyal, Beşeri ve İdari Bilimler; Spor Bilimleri

Journal Type :   Uluslararası

Metrics
Article : 5.146
Cite : 9.738
2023 Impact : 0.075
Asos Journal