联合健康（UNH）股价在盘前上涨2.5%，此前上一交易日涨幅近12%

Core Insights - UnitedHealth (UNH) stock price increased by 2.5% in pre-market trading on August 18, following a nearly 12% rise in the previous trading day [1] Company Summary - UnitedHealth's stock performance indicates strong market interest and potential investor confidence, as evidenced by the significant price increase over two consecutive trading days [1]