Gold prices pulled back from all-time highs last week, but the respite may only be temporary. Donald Trump’s statement that he does not plan to fire Federal Reserve Board chair Jerome Powell combined with his musings about doing a trade deal with China “soon” eased the buying pressure that had driven the precious metal past US$3,500 an ounce a few days before. But it wouldn’t take much – a few combative words or an angry midnight post – to set off a new gold rush. The American president has been single-handedly responsible for driving up the price of the precious...