A slew of weighty global economic worries, and concerns about the looming so-called fiscal cliff at home are weighing on bank stocks Monday. JPMorgan Chase (JPM), the largest U.S. bank by assets, was down 1.5% to 40.49 intraday. Citigroup (C), No. 3 by assets, was nearly 1.5% lower to 35.53, and Wells Fargo (WFC) was off 1.5% to 32.69. Bank of America (BAC), the No. 2 by assets, dipped less than 1% to 9.83. Goldman Sachs (GS), the investment bank