美国4月营建支出月率 -0.4%，预期0.3%，前值由-0.50%修正为-0.8%。

Group 1 - The core point of the article indicates that U.S. construction spending in April decreased by 0.4%, which was below the expected increase of 0.3% [1] - The previous value of construction spending was revised from -0.50% to -0.8%, indicating a downward adjustment in prior estimates [1]