科技股引领美股上半年收官创下历史新高，下半年反弹能否持续？

Core Viewpoint - The necessity of Federal Reserve interest rate cuts for sectors reliant on debt and financing to keep pace with technology stocks is emphasized Group 1: Market Performance - The S&P 500 and Nasdaq Composite indices reached historical highs, with the S&P 500 rebounding over 23% since its low on April 8 [1] - The tech sector has been the primary driver of this record rebound, with the market capitalization of the seven major tech companies increasing by $4.7 trillion since April 8, bringing their total market cap close to $18 trillion [3] - The S&P 500's information technology sector has risen over 41% since early April, while the communication services sector has increased nearly 28% [4] Group 2: Market Breadth Concerns - There are concerns regarding the breadth of the market rebound, questioning whether it is driven by a wide range of stocks or just a few strong performers [5] - The New York Stock Exchange's Advance/Decline (A/D) line reached a historical high, indicating a broad market movement, but only about 50% of S&P 500 stocks are above their 200-day moving average, which is below the healthy range of 65%-80% [6][7] - The equal-weighted S&P 500 index has risen 18.7% since April 8, indicating that smaller companies are not keeping pace with larger ones, which have seen a 24% increase [7]