美国联合健康集团（UnitedHealth Group，股票代码：UNH）周四盘后股价大涨8.14%，引发市场广泛关注。这一显著涨幅主要源于投资界传奇人物沃伦·巴菲特（Warren Buffett）旗下的伯克希尔哈撒韦公司（Berkshire Hathaway）披露新增持有500万股联合健康股票。
根据监管文件显示，巴菲特此次重返联合健康投资阵营，距离其上一次持有该公司股票已有十多年之久。值得注意的是，这一投资决策发生在联合健康集团面临诸多挑战的背景下，包括医疗成本飙升、联邦调查以及其子公司遭受网络攻击等问题。特别是去年发生的网络攻击事件，影响了约1.927亿人，被认为是美国历史上最大规模的医疗数据泄露事件。
分析人士认为，巴菲特此时选择投资联合健康，可能看中了该公司在当前困境中的长期价值。今年以来，作为道琼斯工业平均指数成分股的联合健康股价已下跌46%。巴菲特的加入无疑为市场注入了一剂强心剂，提振了投资者对联合健康未来发展前景的信心。
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