Jeremy Grantham, co-founder of GMO, has issued a stark warning that the US equity market is trading at its most expensive valuation in history, setting the stage for a potential historic decline.
The veteran investor argues that current pricing leaves little margin for error, adding to growing caution around earnings exuberance and heavy tech spending.
Grantham’s assessment comes as market participants grapple with the sustainability of recent rallies.
While corporate earnings have supported valuations, the veteran investor suggests that the current level of optimism is detached from historical norms.
This view aligns with broader concerns about the concentration of market gains in a narrow set of high-growth names, particularly within the technology sector.
The warning adds to a chorus of skepticism regarding the durability of the current bull market.