Costco Q4 Earnings Report Approaches as Motley Fool Questions Buy Timing Qualcomm Surges as Investor Optimism Grows Over AI Device Boom WuXi Facility Secures Brazilian GMP Certification for Dengue Vaccine Production Anthropic in Discussions with Microsoft for Potential AI Chip Agreement Following Investment SP 500 and Nasdaq Hit Record Closing Highs on AI Optimism ADP Private Payrolls Rise 109000 in April Exceeding Forecasts Southeast Asias Biofuel Push Strains Food Supplies and Export Capacity