JPMorgan says US stocks are so crowded they may crack at any time

The Wall Street giant’s chief global equity strategist warned clients on Wednesday that they could be “stuck on the wrong side” of the momentum trade when it eventually falters, and he encouraged them to consider diversifying their holdings and thinking about risk management in their portfolios. He also reiterated his warning that excessive crowding in the market’s best-performing stocks raises the risk of an imminent correction.