Renowned short seller Carson Block, founder of Muddy Waters Capital, believes that artificial intelligence could trigger a period of market and economic disruption that may ultimately exceed the fallout from the 2008–09 global financial crisis, according to a report by the Financial Times.
Speaking in an interview, Block said rapid AI adoption is likely to reshape labour markets, corporate earnings and public finances over the coming years, with knock-on effects for financial stability and asset prices.
He suggested the scale of disruption could create a more favourable environment for short sellers, marking a potential regime shift after a prolonged period in which bearish strategies have struggled to generate returns.
Block said that, over the medium term, deteriorating economic and market conditions linked to AI-driven disruption could improve the opportunity set for short sellers.
He compared the potential environment to the 2008 crisis period, when widespread dislocation created significant downside opportunities across equities and credit markets.
The comments come after several years in which structural market support – including passive inflows, retail dip-buying and strong index performance – has made shorting US equities particularly challenging.
Recent data suggests hedge fund positioning is beginning to reflect a more cautious stance. Short interest in S&P 500 constituents has moved towards multi-year highs, while sector-level positioning in areas such as software has also increased to levels not seen since tracking began in 2016, according to Goldman Sachs data.
The shift comes as enthusiasm around AI has become more selective, with performance dispersion widening between perceived winners and potential structural losers.
Block highlighted recent weakness in software and other AI-exposed sectors as early evidence of structural disruption beginning to feed through markets.
He argued that technology-driven labour displacement could have broader macro implications, including reduced retirement savings contributions, particularly through US 401(k) flows, which in turn could impact equity market demand over time.
Beyond equities, Block pointed to potential vulnerabilities in private credit markets, suggesting that rapid asset growth in the sector may have outpaced underwriting discipline.
He warned that weaker credit standards and excess liquidity in parts of the market could amplify losses in a downturn, particularly if macro conditions deteriorate alongside AI-related disruption.
His comments align with a broader debate among distressed investors, some of whom see rising stress in private credit as a potential opportunity set reminiscent of post-2008 dislocation.
Block is best known for high-profile activist short campaigns, including against Sino-Forest and Luckin Coffee.
