JP Morgan Chase & Co. shares dropped by 5% in premarket trading on Wednesday, following the bank’s announcement of a lower-than-expected fourth-quarter profit and a reduction in its full-year earnings outlook. The bank also expressed concerns over the potential impact of falling interest rates on its net interest income. The Federal Reserve’s recent decision to lower interest rates three times in 2019 has raised concerns among investors about the profitability of large banks, particularly those heavily reliant on net interest income.