LONDON (Reuters) - Massive stockpiling of gold by investors spooked by the coronavirus outbreak offset a collapse in jewellery production to keep global demand for the metal stable in the first three tumultuous months of 2020, the World Gold Council said on Thursday. The coronavirus has upended the gold trade, with lockdowns shuttering the two biggest markets, China and India, and disrupting supply routes. It has also roiled financial markets, triggering a surge of investment in the metal..