Berkshire Hathaway Portfolio Reshuffle New Stakes in Delta Air Lines and Alphabet Wall Street Edges Higher as Mideast Peace Prospects Bolster Investor Sentiment Kevin Warsh Sworn In as Fed Chair Promises ReformOriented Approach in White House Ceremony Evaluating XLE Energy ETF for Summer Portfolio Positioning Amazon Bets 200 Billion on AI Infrastructure A Strategic LongTerm Pivot Unretirement Trend Older Americans Rejoin Workforce Driven by Financial Needs and Purpose US Productivity Growth Slows Unit Labor Costs Rise in Q4 Implications for Inflation and Fed Policy