Lenovo Shares Surge 15 on Record Earnings as AI Revenue Nearly Doubles Visa Restrictions Push US Companies to Develop Contingency Plans as 80 Report Immigrant Executives SP 500 Treads Water as Technical Sell Signals Flash Amid Nvidia Earnings Hype CareDx Q1 2026 Earnings Robust Profit Beat Drives Optimism MGRD Q1 2026 Earnings Affiliated Managers Group Reports EPS Beat of 823 Slightly Above Consensus Warren Buffetts Record 397B Cash Hoard and Michael Burrys 1B AI Short Signal Market Caution