According to Goldman Sachs, although S&P 500 index constituents reported better-than-expected overall earnings in the first quarter of this year, significant investment-related gains from several large technology companies substantially boosted the aggregate figures, potentially leading to an "overestimation" of true corporate profit growth. The Goldman Sachs research team noted that the year-over-year earnings growth rate for S&P 500 companies that have already reported first-quarter results approached 25%. However, investment gains from Amazon.com (AMZN.US) and Alphabet (GOOG.US, GOOGL.US) contributed significantly to the overall profit figure, thereby somewhat "distorting" the market's assessment of corporate earnings health. Goldman Sachs stated that after excluding the impact of these investment gains, the actual underlying earnings growth rate for S&P 500 companies is closer to 16%. While this level still indicates overall robust profitability for U.S. corporations, it is notably lower than the growth rate suggested by the surface data. In the current U.S. stock market, the influence of a handful of large technology companies on the overall index's earnings and valuation is continuously expanding, a phenomenon that becomes particularly evident during earnings season. As the artificial intelligence investment wave continues to intensify, large tech firms are further widening the profit gap with traditional industries through cloud computing, AI infrastructure, and capital investment returns. Consequently, the market is increasingly focusing on the "quality" and "sustainability" of corporate earnings growth, rather than just the data itself. Goldman Sachs believes that against the backdrop of the market continuously evaluating valuation levels, economic growth momentum, and future corporate capital expenditure prospects, investors may place greater emphasis on core earnings performance after excluding one-time gains. Recently, AI-related leaders including NVIDIA (NVDA.US), Amazon.com, and Alphabet have continued to drive the rise of U.S. stock indices, further reinforcing the dominant role of large technology companies in the market's overall performance.