美国3月营建支出月率 -0.5%，预期0.2%，前值由0.70%修正为0.6%。

Group 1 - The core point of the article indicates that U.S. construction spending in March decreased by 0.5%, which was below the expected increase of 0.2% [1] - The previous value of construction spending was revised down from 0.7% to 0.6% [1]