Shares of coal-related companies end mixed in the region. Adaro Energy gained 1.8% in Jakarta, while BHP Billiton lost 1.31% in Sydney. Indika Energy lost 3% in Jakarta, while Rio Tinto fell 2.2% in Sydney. But, Adaro, Indika, and other major coal producers are not the ones heavily traded. It is Sekawan Intipratama (SIAP) with volume close to 1 billion shares. For whatever reason, SIAP has been traded heavily since late last year. To subscribe please click here