意大利9月制造业PMI指数降至49，预估49.9，前值50.4

Group 1 - The core point of the article is that Italy's manufacturing PMI index for September has decreased to 49, which is below the forecast of 49.9 and the previous value of 50.4 [1] Group 2 - The decline in the PMI index indicates a contraction in the manufacturing sector, as a PMI below 50 signifies a reduction in manufacturing activity [1] - The previous value of 50.4 suggests that the manufacturing sector was in a state of expansion prior to this decline [1] - The forecasted value of 49.9 indicates that analysts expected a slight contraction, but the actual result of 49 shows a more significant downturn than anticipated [1]