Alphabet’s stock surge this week was not about a single product launch or earnings beat. Instead, investors appear to be reassessing Google’s long-term position in artificial intelligence, pushing the company’s valuation above the $4 trillion mark and placing it among the most valuable corporations ever traded.

The AI trade is no longer moving as a single theme. As capital rotates into companies that control physical bottlenecks such as power, compute capacity, cooling, and automation, performance across AI-linked equities is diverging sharply.

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