ERLINDUNGAN HUKUM BAGI INVESTOR ATAS KEGAGALAN SISTEM PERDAGANGAN DAN PENYELESAIAN TRANSAKSI EFEK DALAM PELAKSANAAN SISTEM PERDAGANGAN EFEK TANPA WARKAT (SCRIPLESS TRADING) DI PASAR MODAL INDONESIA LEGAL PROTECTION FOR THE INVESTOR FROM THE FAILURE OF THE TRADING SYSTEM AND STOCK TRANSACTION SETTLEMENT IN THE IMPLEMENTATION OF SCRIPLESS TRADING IN INDONESIA CAPITAL MARKET - FATHIYYAH, NOVIANTI (2013)