PERBEDAAN ABNORMAL RETURN DAN TRADING VOLUME ACTIVITY ATAS PENGUMUMAN KENAIKAN HARGA BBM PADA SAHAM YANG TERGOLONG LQ 45 - Suparsa, I Made Joni (Accounting Department,Economic and Business Faculty of Universitas Udayana in collaboration with the Association of Accounting Department of Indonesia, Bali Region, 2014)