Steve Eisman, the investor made famous for shorting the housing market ahead of the 2008 crisis, joined Jesse Day on Commodity Culture and described today’s equity market as effectively a single trade.
He sees striking similarities between the current AI driven rally and the pre-crisis period, when participants grew overly optimistic and charged ahead without fully considering the consequences. Eisman stressed that the concentration is extreme from a pure flow of funds perspective. Info tech alone is roughly 40 percent of the S&P, a weight never seen for any sector in the index’s history, and when related industrials that supply data centers and power are included the figure climbs toward 65 percent.
He added that even the bond side of a traditional 60 40 portfolio is no longer diversified, with 15 percent of corporate bonds already AI related and half of all new issuance in 2026 tied to the same theme.
Eisman was blunt about the spending commitments. The big AI names are way over their head, he said, without the revenue to back their capital expenditure. You are not even close to getting to the revenue to support that. You are betting the ranch. He noted that narrative currently outweighs valuation, so multiples can stay elevated as long as the story remains intact, but once the narrative shifts the results could be catastrophic. He and his wife have already shorted 70 percent of their largest tech positions against the box, a hedge that has worked so far, though tax rules will force them to lift the trade by the end of January.
On gold Eisman was characteristically direct. I’m not a gold bug. I’ve never been an investor in gold. I don’t believe in it. It does not pay you anything. He acknowledged that others have made money in the metal over recent years, but it simply is not his approach.
The interview stayed focused on the concentration risk in AI related equities and credit, the potential for a sharp correction if spending fails to generate matching revenue, and the broader implication that owning the S&P no longer provides the diversification many investors assume.
