Rio Tinto (NYSE: RIO ) is one of the most important mining companies in the world and its portfolio combines iron, copper, aluminium and lithium, which allows it to have a robust balance sheet andI am an individual investor with over five years of experience in personal investing, holding a PhD in Economics from UCEMA. My investment approach focuses on value companies with solid long-term potential. I share my knowledge with the community by offering analysis to support individual investors. My articles ref ...