Wall Street's biggest bank is sounding a note of caution about the AI trade that has powered stock markets to record highs.
According to The Decoder, J.P. Morgan says it sees "signs of investor exuberance" in AI markets — analyst shorthand for the kind of enthusiasm that can run ahead of underlying reality.
The bank points to how concentrated the gains have become. The Decoder reports that just 42 AI-related companies in the S&P 500 now account for between 65 and 80 percent of the entire index's total profits. In plain terms, a small cluster of firms is doing most of the heavy lifting for a benchmark that millions of retirement and index-fund investors rely on.
J.P. Morgan also flags warning signs in chip stocks specifically. The semiconductor rally, according to the report, is flashing technical chart patterns last seen during the late-1990s dotcom bubble, and demand for leveraged chip ETFs — funds that amplify bets on semiconductors — has surged.
None of this is a prediction that a crash is imminent. It is a respected bank cataloguing the conditions that historically precede sharp corrections.
Why it matters: because AI stocks now underpin so much of the market's value, any unwinding of that exuberance wouldn't just hit tech enthusiasts — it could ripple through the savings of ordinary investors.