Prominent global short seller Carson Block, founder of Muddy Waters, has issued a stark warning: bets against the U.S. stock market are set to become highly profitable as artificial intelligence disrupts the market.

Carson Block, one of the world's most renowned short sellers, stated that AI could trigger a stock market shock surpassing the scale of the 2008-2009 global financial crisis. For U.S. stock short sellers who have endured years of hardship, this potentially reopens a significant avenue for profit.

The founder of Muddy Waters Capital indicated that the rapid proliferation of AI will inflict profound impacts on the economy and markets in the coming years, as turmoil in the job market inevitably spills over into government finances and financial stability.

Block stated, "Over the medium to long term, there will be severe economic and market consequences, along with government fiscal problems, which I believe will dwarf the global financial crisis."

"As a short seller, this will be an ideal environment to operate in," he added, comparing the potential profits to the substantial gains made by those who bet against the market during the 2008 collapse.

This prediction from Block signals a potential reversal of fortune for U.S. stock short sellers after years of struggle. Concurrently, the rally in the blue-chip S&P 500 index is showing signs of exhaustion, with the market's AI frenzy increasingly dividing companies into perceived "winners" and "losers" of the technology.

In recent years, several well-known short sellers have scaled back operations or shuttered their firms. This list includes Jim Chanos, who famously shorted energy giant Enron before its 2001 collapse, and Nathan Anderson of Hindenburg Research.

The prolonged surge in U.S. stocks over recent years has severely pressured short sellers. This rally has been primarily fueled by狂热 for AI, passive index-tracking investment funds, and a large cohort of retail investors who consistently buy during market dips.

Notably, Block himself shifted to a net long strategy towards the end of 2024.

However, the S&P 500's momentum has faltered this year. Even before the conflict involving Iran, concerns that AI could disrupt business models triggered a broad sell-off in certain sectors. This has prompted a major reshuffling of capital within the U.S. market, offering renewed hope for short sellers and stock pickers who have been sidelined for years.

Block pointed to the severe selling pressure this year on software and other sectors deemed "AI losers" as the "rumblings of an impending AI storm" that is set to revitalize short-selling activity.

Goldman Sachs's quarterly data on hedge fund positioning shows that short interest in S&P 500 constituent stocks approached a ten-year high in February.

The software sector has become a prime target for hedge funds. Goldman's data indicates that short exposure to this sector rose in February to its highest level since records began in 2016.

Block believes the shockwaves from AI will ripple through the broader market via job losses. Reduced contributions to 401(k) retirement plans, which allow American savers to invest pre-tax income in financial markets, would further weaken stock prices.

He also highlighted vulnerabilities in the private credit sector, stating, "Too much capital has flooded into an asset class that simply cannot generate enough quality loans."

He warned that the financing landscape in this area "could be filled with a significant amount of pure junk assets."

"If I started digging deeply into private credit and how potentially fragile the pillars supporting credit in the economy are now, things could deteriorate very quickly," he said.

Some distressed debt investors have recently suggested that concerns over the private credit sector present the best profit-making opportunity since 2008.

Block revealed that he personally missed out on the massive profits available to short sellers during the global financial crisis. "Although I foresaw the bubble bursting, I didn't make a fortune in '08 because I was busy building my self-storage business at the time," he said.