7月31日电，美国7月芝加哥PMI为47.1，预期42，前值40.4。

Core Insights - The Chicago PMI for July is reported at 47.1, which exceeds the expected value of 42 and is an increase from the previous value of 40.4 [1] Group 1 - The Chicago PMI indicates a slight improvement in manufacturing activity compared to the previous month [1] - The current PMI value suggests that the manufacturing sector is still contracting, as values below 50 indicate a contraction [1]