Billionaire fortunes are getting whipsawed by global trade tensions, but for one group – tycoons with major holdings in gold-mining assets – it’s a prosperous time. Four mining billionaires, including Egypt’s Naguib Sawiris and Russia’s Suleiman Kerimov, have grown their fortunes by $1.8-billion this year. Spurred by central bank easing, the metal has gained about 16% in 2019 and is poised for its best year since 2010.
