The Dow Jones Industrial Average and the Transportation Index hit all-time highs, and the Dow Theory issued its first buy signal in more than a year, confirming that the U.S. stock bull market has a solid foundation. The seven AI giants have cooled down and funds are spreading to broad-spectrum sectors. S&P 493 earnings growth will accelerate to 9% in 2026. As the market enters the rebalancing stage from concentration to decentralization, it is necessary to seize structural opportunities and be wary of switching fluctuation risks.