美国5月NAHB房产市场指数 34，预期40，前值40。

Core Insights - The NAHB housing market index for May in the United States is reported at 34, which is below the expected value of 40 and matches the previous value of 40 [1] Group 1 - The current index of 34 indicates a decline in builder confidence in the housing market [1] - The expectation of 40 suggests that analysts anticipated a more positive outlook for the housing sector [1] - The unchanged previous value of 40 indicates that there has been no improvement in builder sentiment compared to the prior month [1]