Analisis Dampak Stock Split Announcement terhadap Abnormal Return pada Kondisi Bull Market dan Kondisi High Economic Growth pada Perusahaan yang Terdaftar di Bursa Efek Indonesia Tahun 2010-2016 = Analysis of Stock Split Announcement Effect to Abnormal Return in accordance with Bull Market and Bear Market Condition and High Economic Growth and Low Economic Growth Condition on Listed Companies in Indonesia Stock in 2010-2016