Canada Reviews Amazon Cloud Contracts Following Quebec Warehouse Closures and Layoffs Polymarket Opens Retail Access to Prediction Contracts on OpenAI and SpaceX From Singapore to Brussels World Leaders Eye Potential TrumpXi Summit US Stock Markets Closed for Memorial Day SP 500 Nasdaq to Remain Shut on Monday Prediction Market Investment Surge Continues Despite Regulatory Uncertainty Earnings Calls Reveal Firm Commitment Ubisoft Shares Slide After Publisher Warns of Continuing Losses OpenAI Poised for Confidential IPO Filing Signaling Race to Public Markets