Both AI giants released earnings reports, but Microsoft's stock rose 4% in after-hours trading, while Google's fell 8%. What's the difference? Google's Q3 revenue reached $127.6 billion, exceeding expectations. However, its free cash flow was -$9.07 billion. Where did the money go? It all went into AI data centers and chips; capital expenditure directly ate up operating profit. Meanwhile, Microsoft's Azure and Copilot are already showing real returns. The market is voting with its feet: No matter how grand your AI story is, if your cash flow is negative, your stock will still plummet. The hype surrounding AI is over. From now on, only those who break even deserve to rise. If Google's stock price continues to fall sharply, will Buffett, Duan Yongping, and Dan Bin continue to buy more Google shares?