...South32 Ltd.'s commitment to a conservative capital structure and low leverage supports a strong balance sheet through the cycle. The company's actively managed balance sheet enabled it to maintain an adequate rating buffer and overcome a weak commodity price environment in 2016. South32 was able to capitalize on the subsequent commodity price recovery, with capacity to fund internal capital expenditure, acquisitions, and shareholder returns. A diverse portfolio of 10 commodities provides some protection against price fluctuations for any given commodity. In addition, the company has a good cost position and strong market positions in manganese ore, silver, lead, and metallurgical coal; and a long reserve life. Production across multiple countries also provides some protection against jurisdiction risk. The highly cyclical mining industry tempers our favorable view of South32's competitive position and portfolio diversity. The company's operating results and credit measures are sensitive...