Is the Market in a Bubble? Kostin Sets the Record Straight
Kostin sees opportunities in consumer and healthcare stocks, as well as companies positioned to drive more revenue from AI. Goldman Sachs chief equity strategist David Kostin is set to retire after 31 years, and he’s been inundated with one question on his way out: Is the market in a bubble? His retirement, announced in September, was discussed further in a newly released firm podcast. Ben Snider will succeed him as the firm’s fifth chief equity strategist in more than five decades, while Kostin remains as an adviser. Kostin said that while market analysis has evolved from picking individual winners to selecting groups of stocks based on factors such as balance-sheet strength and global exposure, the core framework is unchanged from 30 years ago: the economy, earnings, valuation, and money flows. “Those are the four legs of the table when identifying opportunities,” he said. For now, Kostin is encouraged by steady VIX levels and a strong third-quarter earnings season heading into 2026. On the question of an AI bubble, he argues that public markets are not in one. Large AI-linked companies trade around 30 times earnings—high, but far below the 40x valuations seen after COVID or the 50x levels of the dot-com era. IPO activity is also far more subdued compared with 1999 and 2021.The private markets, however, tell a different story: rising valuations and vendor financing pressures point to unsustainable pricing. Looking ahead, Kostin highlights several opportunity areas. He sees promise in consumer stocks, noting that middle-income households should benefit from next year’s tax reforms despite concerns about rising unemployment. He also points to healthcare stocks, which are trading at 30-year valuation lows relative to the broader market. Finally, he favors companies that can leverage AI to boost revenue rather than rely solely on cost-cutting. Goldman’s S&P 500 target for next year is 7,600—slightly above MarketWatch’s Wall Street estimate of 7,500.






