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As AI disrupts industries, the stock market grapples with identifying true losers, mirroring past tech shifts where initial volatility masked long-term winners. Investors are urged to tread carefully.
The rapid advancement of artificial intelligence (AI) has sparked a new wave of market volatility, with stocks in sectors ranging from software to information services facing significant pressure. However, historical patterns suggest that the stock market often struggles to accurately identify losers during technological shifts. This insight, articulated by writer and investor Alisdair Nairn, underscores the need for investors to exercise caution and avoid overreacting to perceived threats.
The ability of the market to predict winners and losers in the face of disruptive technologies has historically been inconsistent. For instance, when the first British steam railway between Stockton and Darlington opened in 1825, it was cheaper and faster at moving goods than canals. Despite this clear advantage, investors in British canal stocks remained complacent for nearly a decade. Similarly, Western Union, the dominant U.S. telegraph company, dismissed Alexander Bell's telephone as a minor threat, even when offered the patents in 1876 for a nominal fee. Western Union outperformed the U.S. stock market for a decade until the mid-1890s, despite the rapid adoption of telephony.
The current AI boom presents several risks that investors should consider:

Despite the risks, there are significant opportunities for investors who can navigate the AI landscape effectively:
The market's poor track record in identifying losers during previous technological booms serves as a cautionary tale for investors navigating the AI landscape. While it is essential to be aware of potential threats, overreacting to perceived risks can lead to missed opportunities. By maintaining a balanced and long-term perspective, investors can position themselves to capitalize on the transformative potential of AI while managing associated risks.
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Marcus began tracking AI's market implications in 2016, noticing AI-related patent filings accelerating ahead of earnings upgrades before most of the sell-side had caught on. A former fixed-income quantitative analyst, he spent two decades building models that priced risk across emerging markets before pivoting to cover the economic impact of AI full-time. His writing translates opaque technical developments into clear risk/reward terms — and he's rarely diplomatic about the gap between AI valuations and underlying fundamentals. He believes most market participants still underestimate AI's long-run deflationary effect on knowledge work.
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25 April 2026
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