Investors are piling into U.S. equity funds at the fastest pace in years. But now the pendulum may swing back, warns Barclays

Investors are investing in U.S. equity funds at a rapid pace, but Barclays warns of a potential pullback due to funds being fully invested. The risk of a pullback has increased, indicating a possible shift in market trends. This surge in investment may be followed by a pendulum swing back.