Despite their massive capex, mining companies are known to pay healthy dividends to investors. For instance, currently, BHP Group (BHP) \- which is the world’s largest mining company – has a yield of over 5%, while Rio Tinto (RIO), the second-biggest mining company, yields over 6%. Is Rio Tinto stock a buy for its fat dividend yield? In this article, we’ll look at the mining giant’s dividend policy and analyze whether it’s a good buy at current prices. Mining Companies’ Dividend PolicyUntil early 2016, both BHP and RIO practiced what was known as a “progressive dividend policy.” Under that pol…