美国5月成屋签约销售指数环比 1.8%，预期 0.1%，前值 -6.3%。

Group 1 - The core point of the article is that the U.S. May existing home sales index increased by 1.8% month-over-month, significantly surpassing the expected increase of 0.1% and recovering from a previous decline of 6.3% [1] Group 2 - The increase in the existing home sales index indicates a potential recovery in the housing market, suggesting improved buyer confidence and market conditions [1] - The data reflects a positive trend in real estate activity, which could have implications for related sectors such as construction and home improvement [1] - The significant deviation from the expected figure may prompt analysts to reassess forecasts for the housing market and its impact on the broader economy [1]