美国10月ISM制造业指数为48.7，预期为49.5，前值为49.1

Group 1 - The core point of the article is that the US ISM Manufacturing Index for October is reported at 48.7, which is below the expected 49.5 and the previous value of 49.1 [1] Group 2 - The ISM Manufacturing Index indicates a contraction in the manufacturing sector as it is below the neutral level of 50 [1] - The decline from the previous month suggests a potential slowdown in manufacturing activity [1] - The data may influence market sentiment and economic forecasts, particularly regarding the health of the US economy [1]