Bloomberg Shopify Inc. Chief Executive Officer Tobi Lutke called a short seller that targeted his company a “troll,” in his first public response since being targeted by Andrew Left’s Citron Research recently. Left, who said he had taken a short position in the stock, published a report questioning the sustainability of the Canadian e-commerce company’s growth rate and calling its …

Bloomberg Chancellor of the Exchequer Philip Hammond poured cold water on the idea that planes would be unable to fly from the UK to the European Union if there’s no deal on Brexit, a favourite theme of opponents of an abrupt departure from the bloc. Britain’s air-traffic controllers currently work under agreements that are part of Britain’s EU membership. When …

Bloomberg A panel of industry and law enforcement officials couldn’t agree on how civilian drones should be tracked by authorities, adding uncertainty to the push for expanded commercial uses. The advisory committee, established earlier this year by the Federal Aviation Administration, couldn’t reach consensus on key issues, such as what type of drone models should be subject to radio tracking, …