Core Viewpoint - The report highlights a significant AI capital expenditure race among major tech giants like Microsoft, Meta, Google, and Amazon, warning that such technology-driven capital spending booms often lead to "boom-bust" cycles, resulting in stock market bubbles and substantial investor losses [1][6]. Group 1: Capital Expenditure Trends - Since 2015, capital expenditures by the "Big Four" tech companies have been on a continuous rise, with an explosive growth expected to exceed $200 billion in 2024 and approach $400 billion in 2025 [2]. - This growth trend is projected to continue at least until 2030, with total annual capital expenditures potentially surpassing $500 billion by that year [3]. Group 2: Historical Context and Lessons - The report draws parallels with historical capital expenditure bubbles, specifically the "Canal Mania" of the late 18th century and the "Railway Mania" of the 19th century, both of which saw significant stock price surges followed by rapid collapses [7][8]. - It emphasizes that while canals and railways permanently altered economic landscapes, investors who bought at the peak suffered substantial financial losses, illustrating the disconnect between technological advancement and investor returns [11]. Group 3: Recent Warnings from the Telecom Bubble - The 2000 telecom bubble serves as a more recent cautionary tale, where despite the widespread adoption of telecom technology, stock prices in the sector have not returned to their peak levels from that era, highlighting the disparity between technology success and early investor returns [14]. Group 4: Current Market Dynamics - The report notes that the current AI-driven market has reached extreme valuation levels, with the CAPE ratio nearing historical highs, suggesting potential negative returns in the following decade [17]. - Additionally, market concentration is a significant concern, as the top five companies in the S&P 500 now account for nearly 30% of the index, indicating a heavy reliance on a few firms for overall market performance [19]. Group 5: Investor Caution - The historical analysis serves as a wake-up call for investors, urging caution regarding the potential detachment of capital expenditure-driven stock price surges from fundamental values, as the end of such fervor often leads to harsh corrections [20].

根据报告，"四大科技巨头"——微软、Meta、谷歌、亚马逊的资本支出自2015年以来持续攀升，并在近期呈现爆炸式增长。具体来看，2024年其 资本支出超过2000亿美元，预计2025年接近4000亿美元。 报告预测，这一增长趋势将至少持续到2030年，届时四家公司的年度总资本支出或将突破5000亿美元大关。 历史的车轮滚滚向前，但资本市场的剧本似乎总在惊人地重演。 当前，由人工智能（AI）点燃的资本市场狂热，正将科技巨头推向一场史无前例的资本开支竞赛。据追风交易台消息，德意志银行9月24日发布 的报告显示，微软、Meta、谷歌和亚马逊等科技巨头正以前所未有的力度加码AI基础设施建设，这无疑是一场高风险、高回报的豪赌。 该行警示，历史上由技术革命驱动的资本开支热潮，如18世纪的运河、19世纪的铁路和2000年的电信，最终都演变成了"繁荣-萧条"（Boom- Bust）的周期，导致相关股票泡沫破裂，投资者损失惨重。 这份报告的核心观点是，尽管新技术本身能够永久性地提升生产力并改变世界，但与之相关的金融市场狂热往往以"一地鸡毛"告终。而理解过去 运河、铁路和电信革命中的股市沉浮，为判断当前AI投资热潮未来走向的提供 ...