...PT Bukit Makmur Mandiri Utama's (BUMA) ratings reflect the company's established market position in coal mining services in Indonesia and Australia, and improved cash flow and geographical diversification from mining asset acquisitions, the Dawson Coal Mining Complex in Australia and an ultra-high-grade anthracite coal operation, Atlantic Carbon Group (ACG), in the US. The rating is moderated by BUMA's exposure to contract renewal risk, although the risk is easing for its mining service portfolio, and the vulnerability of its coal production assets to commodity price cycles....