State coal miner PT Tambang Batubara Bukit Asam Tbk (PTBA) booked net profit of Rp870.8 billion in the first quarter 2017, skyrocketed 162% from the corresponding period of 2016, thanks to  improved margins. Bukit Asam’s sales revenue actually grew only by 28% to Rp4.55 trillion, but gross profit doubled to Rp1.69 trillion. To subscribe please click here