Perlindungan terhadap investor beritikad baik dalam pembelian saham Repo di Bursa Efek Indonesia: studi kasus: putusan nomor 618/Pdt.G/2016/PN Jkt.Sel. Benny Tjokrosaputro Vs Goldman Sachs International = Protection towards investors in good faith In purchasing Repo shares In Indonesia stock exchange: case study: decree number 618/Pdt.G/2016/PN Jkt. Sel. Benny Tjokrosaputro V. Goldman Sachs International