Bu çalışmada, Borsa İstanbul'da imalat sektörü içerisinde yer alan 65 işletmenin 2017 ve 2018 yıllarının mali tablo ve dipnotları incelenerek; finansal risk yönetiminde uyguladıkları politikalar, ticari faaliyetlerini yürütürken karşılaştıkları finansal riskler, karşılaşılan risklere karşı türev ürünle ne ölçüde kullandıklarıı ve hangi risk karşısında hangi türev ürünü kullandıkları analiz edilmiştir. Çalışmanın sonucunda, faiz oranı riski, kur riski, kredi riski ve likidite riski firmaların en sık maruz kaldıkları finansal riskler olduğu gözlemlenmiştir. Bu kapsamda işletmelerin en çok, kur riski karşısında türev ürün kullandıkları ve kullandıkları bu türev ürünün vadeli döviz alım-satım sözleşmeleri (forward) olduğu görülmüştür.
In this study, the data of 132 businesses operating in the manufacturing sector in the BIST 100 index were analyzed by econometric methods to test the validity of the theory of pecking order theory and trade off theory, which are included in the literature as capital structure theories. In this context, panel data analysis was used to test the validity of capital structures. The study covers the years 2006-2016. The dependent variables of the study are determined as the ratio of short-term debt to total assets, the ratio of long-term debt to total assets, total debt ratio and the independent variables are determined as the liquidity ratio, the asset structure of the company, the profitability ratios, the size of the firm, the non-debt tax, and the tax level ratio. As a result of the study, it was determined that there was no statistically significant relationship between firm size, return on assets and tax rates and financial leverage ratios in all the established models. BIST 100 companies operating in the manufacturing sector have reached the conclusion that pecking order theory is valid.
Bu çalışma kapsamında Ramazan ayının Türkiye İslami piyasalar üzerindeki etkisi incelenecektir. Türkiye İslami piyasalarını temsilen BİST tarafından hesaplanan Katılım 30 (KAT30) endeksi, ele alınmış ve bu endekse ait 17 Şubat 2011 ile 30 Aralık 2016 tarihleri arasındaki döneme ilişkin günlük getiriler kullanılmıştır. Çalışma da Ramazan Ayı on günlük dilimlere ayrılarak üç kukla değişken oluşturulmuş ve oluşturulan bu kukla değişkenlerin modeldeki etkisi incelenmiştir. Çalışmada 3 EGARCH modeli kurulmuştur; birinci modelde kukla değişkenler ortalama denklemine, ikinci modelde varyans denklemine, üçüncü modelde ise ortalama ve varyans denklemine eklenmiştir. Çalışma neticesinde, elde edilen bulguların Türkiye İslami piyasalarında Ramazan ayı etkisinin varlığını işaret ettiği görülmüştür.
The aim of this study is to investigate the long-term and short-term causality relationship between oil prices and stock market index values. In this context, crude oil prices with Turkey, Saudi Arabia, Jordan, United Arab Emirates, Bahrain, the data belonging to Middle Eastern countries such as Qatar and Kuwait stock exchange index is used. In this study, monthly price data for the period between April 2004 and March 2019 are discussed. In this study,The reason why the Middle Eastern countries were selected is that these countries produced about one third of the world's oil production. These data were analyzed with the help of Hatemi J and Maki cointegration tests and then Toda-Yamamoto and Fourier Toda Yamamoto causality tests in order to reveal the causality relationship. As a result of this study, it was found that the indices of the countries other than Saudi Arabia have a cointegrated relationship with the oil prices in the long run and there is a causal relationship from the oil prices to the UAE, Bahrain, Qatar and Kuwait indices in the short run. In addition, it is determined that there is a causality relationship from the stock market indexes of UAE and Kuwait countries to oil prices in the short term.
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