Kecukupan Peraturan di Bidang Pasar Modal dalam Mengidentifikasi Pelanggaran Pasar Modal Melalui Transaksi Saham oleh Beneficial Owner Perusahaan Terbuka (Studi Kasus Terhadap Transaksi Saham PT SIAP) = Adequacy of Regulations in the Capital Market Sector in Identifying Capital Market Violations Through Stock Transactions by the Beneficial Owner of a Listed Company (Case Study on PT SIAP's Stock Transactions)