分析：美股股指势将结束连胜势头，罕见在11月收跌

Core Viewpoint - The U.S. stock market is expected to end November with declines, marking a deviation from historical trends, particularly in presidential election years [1] Market Performance - As of Wednesday's close, the S&P 500 index has decreased by 0.4%, the Dow Jones by 0.29%, and the Nasdaq by 2.15% [1] - The S&P 500 and Dow Jones have experienced six consecutive months of gains, while the Nasdaq has seen seven months of increases [1] Historical Context - Historically, the average gain for the S&P 500 in November since 1950 is 1.8% [1] - In presidential election years, the S&P 500 typically rises by 1.6% [1] - This year is noted as atypical for a presidential election year, suggesting future market movements may not follow historical patterns [1]