当美联储重启降息，美股会发生什么？

Core Viewpoint - The article discusses the potential impact of the Federal Reserve's anticipated interest rate cut in September, highlighting historical trends in the stock market following similar past events [1][2]. Group 1: Historical Performance of the S&P 500 - Since 1970, there have been 11 instances where the Federal Reserve paused for 5 to 12 months before resuming rate cuts. In these cases, the S&P 500 index showed an average decline of 0.9% in the first month and 1.3% in the first three months after the cut, but an average increase of 12.9% over the following year [2][3]. - The median performance of the S&P 500 one year after the resumption of cuts was a 14.5% increase, with 90.9% of instances resulting in positive returns [2]. Group 2: Market Sentiment and Expectations - Investor sentiment is believed to play a significant role in market reactions when the Fed shifts back to a dovish stance, alleviating previous concerns during the pause [3]. - Following Powell's recent comments, market focus has shifted from whether the Fed will cut rates to how many times and at what pace this will occur [3][4]. Group 3: Current Market Predictions - According to the Chicago Mercantile Exchange's FedWatch tool, traders currently estimate an 85% probability of a 25 basis point cut in September, up from 75% the previous week. There is also an 83.9% probability of at least two cuts this year [4][5]. - Analysts suggest that if the Fed cuts rates in September, the stock market's upward momentum may extend beyond large tech stocks, as lower rates typically encourage investors to seek higher returns along the risk curve [5][6]. Group 4: Sector-Specific Insights - Small-cap stocks are expected to benefit from the rate cut due to their sensitivity to borrowing costs, as evidenced by the Russell 2000 index's 3.9% increase, outperforming the S&P 500's 1.5% rise [6]. - While growth stocks generally perform well in low-rate environments, their current high valuations may limit upside potential unless earnings growth keeps pace [7].