The impact on rate of returns of index letters and indexes from ring open companies: Another application in the Stock exchange in İstanbul

In this thesis study, the models that explain the price formation starting from the concept of market activity were examined, information about the properties and the hypothesis explaining the index change effect was given to the Stock Exchange Istanbul Indexes and, basically, by using the event study method, Borsa Istanbul BIST-30, BIST 50, BIST 100 and BIST Dividend Indices and the effect of these indexes on the returns of the shares of the companies traded on the Stock Exchange Istanbul were investigated. In the analyzes carried out in the scope of two different analyzes on the stock returns of the companies included in the BIST-30, BIST 50, BIST 100 and BIST Dividend Indexes, the effect of the effects of the companies traded in the Stock Exchange Istanbul on short- it is observed that it is also present.