美国4月NFIB小型企业信心指数 95.8，预期94.3，前值97.4。

Group 1 - The core point of the article is that the NFIB Small Business Optimism Index for April is reported at 95.8, which exceeds the expected value of 94.3 but is lower than the previous value of 97.4 [1] Group 2 - The current index indicates a slight improvement in small business confidence compared to expectations, suggesting a potential positive sentiment among small business owners [1] - The decline from the previous month's index reflects ongoing challenges faced by small businesses, despite the current month's better-than-expected performance [1]