The causal relationship between prices and trading volume of stocks in Borsa İstanbul

The efficiency of financial markets has been discussed in the literature for years and continues to be discussed. Having information about the direction and size of the relationship between the prices of financial assets and the trading volume in the stock market provides important information to investors and policy makers about the financial stability of the country. The aim of this study is to investigate the possible causal relationship between the price and trading volume of the financial assets in the BIST stock indices. For this purpose, the causality relationship between price and trading volume was analyzed with the Toda-Yamamoto approach by using the monthly data set of 33 financial assets in of the BIST stock indices. According to the findings obtained from the analysis, bidirectional causality was found in Garanti Bank, SME Industry, Sustainability, BİM Stores, Turkcell, Türk Telekom and TÜPRAŞ indices while the city indices of Ankara, Kocaeli, Tekirdağ, Balıkesir and the indices of Public Offering, Emlak Konut Real Estate Investment Company, Ereğli Demir Çelik, VakıfBank, Akbank, Koç Holding and Turkish Airlines had no causal relationship. In the city indices of Adana and Kayseri and the indices of Corporate Governance, Yapı Kredi, Halkbank and PETKİM have causality from trading volume to price. A causal relationship from price to trading volume was found in Denizli, Antalya, İzmir, Konya, Istanbul, Bursa city indices and Dividend, İşbank and ASELSAN indices. When all the findings are evaluated together, it is observed that the BIST stock market is compatible with the in weak form efficient market model.