NEW YORK: Shares in Goldman Sachs Group fell as much as 8% Tuesday after Wall Street's premier investment bank missed quarterly profit expectations, hampered by weaker trading revenues and rising expenses. However, the bank's global markets division, which houses its trading businesses, still accounted for more than a third of its revenues last year. Aside from the trading slowdown, Goldman was also handicapped by a 23% rise in operating expenses, mainly reflecting higher compensation and benefits costs. The bank expects to hold on to market share gains made by its trading business even as the market environment returns to normal, executives said. Goldman's profit fell to $3.8 billion in the quarter $4.4 billion a year earlier.