美国5月成屋签约销售指数同比 -0.3%，预期 -0.4%，前值 -3.5%。

Group 1 - The core point of the article indicates that the U.S. May existing home sales index decreased by 0.3% year-over-year, which is better than the expected decline of 0.4% but significantly improved from the previous value of -3.5% [1]