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Sign InAmid rising questions about the sustainability of the tech rally, recent analysis suggests the market is facing a 'leverage bubble' rather than a traditional earnings bubble. Leading firms such as NVDA, MSFT, and AAPL are generating record profits and free cash flow, a fundamental shift from the 2000 dot-com era. However, 40% of the S&P 500 is now concentrated in the top 10 stocks, leading to elevated P/E ratios and heightened valuation risks.
Despite concentration concerns, financial data shows continued growth in the semiconductor and software sectors. NVDA has reported massive data center revenue growth in recent quarters according to its earnings statements. Compared to peers, companies like META and GOOGL are also contributing to this cash flow strength, supporting the premise that the rally is driven by operational fundamentals rather than pure speculation, per market data and recent quarterly results.
Regarding price levels, NVDA stood at $194.83, MSFT at $390.49, and AAPL closed at $308.63 (close July 02, 2026). Investors should monitor shifts in risk appetite that could impact these elevated valuations, especially as the immediate economic calendar lacks direct tech-sector catalysts, keeping the focus on the sustainability of free cash flow among these market leaders.