WSJs Heard on the Street Launches Eighth Annual StockPicking Competition Groupon Shares Gain as Restructuring Plan and Improved Outlook Boost Investor Sentiment Pfizer Prevails in Singapore Trademark Dispute with Merck Over Vaccine Brand Warren Buffetts Timeless Investing Wisdom 3 Simple Rules for LongTerm Success AI Drug Discovery Advances Could Transform Treatment for Brain Conditions London Tour Operators See Shifting Demand From Landmark Tours to HighSpeed Thames Rides Amazon Expands AI Shopping Technology to ThirdParty Retailers