The gold miners’ stocks have huge upside potential in 2018, likely the best among stock-market sectors. They really lagged gold last year, so a major mean-reversion catch-up rally is coming. The gold miners are universally ignored and deeply undervalued relative to the metal which drives their profits. And gold itself is likely to power dramatically higher this year as euphoric record-high stock markets inevitably start to falter.

Gold has alway...