Back when I first covered Rio Tinto ( RIO ), I called them an “ Iron Mining Gem At Attractive Prices, With Excellent Dividends Plus Growth Potential ” thanks to their attractive valuation at theAs of 2025, I've got over 10 years of researching companies. In total, throughout my investing life, I estimate that I researched (in depth) well over 1000 companies, from commodities like oil, natural gas, gold and copper to tech like Google or Nokia and many emerging market stocks, which I believe could help me pro ...