4月16日电，美国4月NAHB房产市场指数为40，预期37，前值39。

Core Viewpoint - The April NAHB housing market index in the U.S. stands at 40, exceeding expectations of 37 and slightly up from the previous value of 39 [1] Group 1 - The current index of 40 indicates a positive sentiment in the housing market, suggesting potential growth opportunities [1] - The increase from the previous value of 39 reflects a slight improvement in market conditions [1] - The index surpassing expectations may signal a stronger recovery in the housing sector than previously anticipated [1]