随着 2025 年接近尾声，华尔街正站在十字路口。一方面，12 月传统“圣诞行情”在历史上具有极高胜率；另一方面，推动过去数年美股上涨的人工智能（AI）交易正面临前所未有的质疑。这种矛盾使投资者在追涨与防范回调之间陷入犹豫。
从历史数据看，圣诞行情通常涵盖 12 月最后五个交易日和 1 月前两个交易日。自 1929 年以来，这一时间窗口中股市约有 79% 的概率上涨，平均回报率约为 1.6%，过去八年仅出现过一次下跌。然而，市场对这一规律的高度共识，反而引发担忧。部分投资者认为，过于“拥挤”的交易往往回报递减，甚至可能成为市场反向运行的触发点。
风险资产的疲态已开始显现。比特币当前价格约为 89,460 美元，过去一个月下跌近 7%，未能守住此前 95,000 美元上方的重要区间。这种走弱被视为整体风险偏好降温的信号。
更深层的焦点仍在人工智能板块。过去三年，AI 叙事推动标普 500 指数市值增长约 30 万亿美元，但近期从英伟达的回调、甲骨文在披露高额 AI 投资后的股价下跌，到市场对 OpenAI 相关公司的情绪降温，都显示出投资者开始重新评估回报周期。Alphabet、微软、亚马逊和 Meta 未来一年预计将投入超过 4000 亿美元用于数据中心建设，折旧成本快速攀升，而回报却尚未完全显现。
调查显示，不到一半的 AI 项目实现了高于成本的收益，但多数企业仍计划继续加码。这种投入与回报预期之间的错位，成为市场对 AI 交易最核心的疑问。
尽管如此，将当前局面直接类比 2000 年互联网泡沫仍显夸张。纳斯达克 100 指数市盈率约为 26 倍，显著低于当年的极端水平。短期来看，季节性因素和 FOMO 情绪或仍支撑市场；但进入 2026 年，人工智能投资能否兑现盈利，将成为决定市场方向的关键变量。
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