TY - JOUR T1 - Analysis of Istanbul Stock Market Returns Volatility with ARCH and GARCH Models AU - Yurttagüler, İpek PY - 2024 DA - September DO - 10.26650/ISTJECON2023-1276992 JF - İstanbul İktisat Dergisi PB - İstanbul Üniversitesi WT - DergiPark SN - 2602-4152 SP - 37 EP - 58 VL - 74 IS - 1 LA - en AB - In today’s world where globalization is intensely experienced, differences in risk perception, developments in capital markets, and the negativities faced in the markets due to uncertainty are very important when researching the structures of the stock markets, and therefore determining current volatilities. One of the biggest problems encountered is the inability to price stocks effectively. Therefore, estimating and modeling volatility becomes crucial. The diversity of the portfolio, created by international investors in the financial markets and the sustainability of their investment decisions, are closely related to the volatility variable. 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