JPMorgan stays bearish on the stock market and warns that an AI bubble is brewing amid record concentration in mega-cap stocks

• JPMorgan's Marko Kolanovic is staying bearish on the stock market despite its strong rally.
• He warned the hype around artificial intelligence is creating a new bubble.
• These are three catalysts that Kolanovic expects will drive a sell-off in the stock market.

JPMorgan's Marko Kolanovic is unfazed by the S&P 500's strong rally since its mid-October low and is reiterating his bearish view on stocks.