(Bloomberg) -- Doosan Robotics Inc. more than doubled in its trading debut in Seoul after raising 421 billion won ($309 million) in South Korea’s largest initial public offering this year. Most Read from BloombergAlmost Anyone Can Become the House Speaker, Except Donald TrumpKey Taiwan Tech Firms Helping Huawei With China Chip PlantsUS Stocks Buoyed by Big Tech Gains as Yields Slide: Markets WrapOzempic Is Making People Buy Less Food, Walmart SaysFootball’s World Cup Is Coming to North Africa fo