周四，Microsoft 市值单日暴涨16%，增加约4,500亿美元（约合人民币3.27万亿元），创下史上单一企业单日市值增幅最高纪录，超越Nvidia此前4,400亿美元的纪录。此一增幅本身已超过标普500指数中96%的企业总市值，亦大于南非整体股市规模。投资者之所以大为振奋，在于Microsoft在人工智慧支出议题上采取了审慎立场：云端业务成长正在加速，旗舰AI工具用户数快速攀升，且本年度资本支出将维持稳定。尤为关键的是，财务长Amy Hood表示公司预计在未来一年内维持正向自由现金流。
在科技业今年最核心的辩论中——数千亿美元投入AI伺服器农场能否真正带来回报——华尔街对不断攀升的支出日益紧张。Microsoft的竞争对手Google与Amazon均已陷入自由现金流为负的境况，Meta预计也将步其后尘。D.A. Davidson & Co.分析师Gil Luria指出，Microsoft之所以获得市场更丰厚的回报，正是因为它是唯一承诺维持正向现金流的巨头。与此同时，Amazon执行长Andy Jassy辩称，公司正经历一个加速版的早期Amazon Web Services云端基础建设周期，即便今年拨出2,200亿美元（约合人民币1.6万亿元）资本支出，仍无法满足全部云端需求。Amazon股价在盘后交易中飙升约10%，受连续第五个季度云端成长加速及自2021年底以来最大年增幅所推动。
然而，Microsoft审慎支出的策略是否正确仍有待时间检验。该公司此前曾犯过类似失误：约于2025年初，Microsoft为节省开支而削减部分资料中心建设，此决定后来被多位高层视为失策，因其导致云端容量短缺，使公司错失大量可得业务——这一产能缺口至今仍困扰著Microsoft。在竞争对手纷纷大举押注AI基础设施之际，Microsoft能否在谨慎与进取之间取得平衡，将是决定其未来竞争地位的关键。
On Thursday, Microsoft's market capitalization surged 16%, adding approximately $450 billion in a single day — the largest single-day gain ever recorded for any company, surpassing Nvidia's previous record of $440 billion. That increase alone exceeds 96% of S&P 500 companies by market value and is larger than South Africa's entire stock market. Investors reacted enthusiastically because Microsoft struck a cautious tone on AI spending: cloud growth is accelerating, its flagship AI tool is gaining users rapidly, and capital expenditure will remain stable this year. Most critically, Chief Financial Officer Amy Hood indicated the company expects to stay free cash flow positive in the coming year.
At the heart of tech's biggest debate this year — whether hundreds of billions spent on AI server farms will truly pay off — Wall Street has grown increasingly anxious about escalating expenditures. Microsoft's rivals Google and Amazon have each tipped into negative free cash flow, with Meta expected to follow soon. Analyst Gil Luria of D.A. Davidson & Co. noted that Microsoft was rewarded more handsomely precisely because it alone committed to remaining cash flow positive. Meanwhile, Amazon CEO Andy Jassy argued the company is undergoing an accelerated version of the original AWS cloud build-out, where steep early spending yields strong later returns. Even allocating $220 billion in capital expenditures this year will not meet all cloud demand, Jassy said. Amazon shares soared roughly 10% in after-hours trading, buoyed by a fifth consecutive quarter of accelerating cloud growth and the largest year-over-year increase since late 2021.
Whether Microsoft's cautious spending stance proves correct while rivals bet aggressively remains to be seen. The company has erred on this front before: around early 2025, Microsoft curtailed some data center development to save costs, a decision later regretted by many senior leaders as it worsened a cloud capacity shortage and prevented the company from capturing available business — a shortfall Microsoft still contends with today. As competitors pour resources into AI infrastructure at unprecedented scale, Microsoft's ability to balance prudence with competitiveness will be pivotal in determining its future market position.