Berkshire Hathaway Revamps Portfolio Delta Airlines Bet and Alphabet Boost Signal Strategic Shift DOJs 68 Billion Enforcement Push Targets Nonprofit Fraud Reveals 250 Million Missing in Minnesota Navitas Semiconductor Gains on Nvidia Earnings Anticipation and AI Data Center Prospects Wall Street Mixed Consumer Strength Battles Tech and Energy Weakness Alibaba Unveils NextGeneration Zhenwu AI Chip and New Large Language Model New Fed Chair Kevin Warsh Faces Doom Loop of Debt and Inflation as Bond Market Signals Danger US Productivity Growth Slows in Fourth Quarter as Unit Labor Costs Accelerate