美国运通2季度营收178.6亿美元，预期177.1亿美元；每股收益4.08美元，预估为3.87美元。

Group 1 - The core viewpoint of the article highlights American Express's strong financial performance in Q2, with revenue of $17.86 billion exceeding expectations of $17.71 billion [1] - The company reported earnings per share of $4.08, surpassing the forecast of $3.87 [1]