The FTSE 100 index in the London stock market was up by nearly 1.6 percent by midday on Wednesday after strong results in the U.S. from Goldman Sachs and Intel boosted investor confidence. The FTSE 100 index was up 66.09 points, or 1.56 percent, at 4,303.77 points at GMT 12:50. Shares in Land Securities rose 3.6 percent after the company issued an upbeat trading statement. Fashion retailer Next saw its shares increase by 3.2 percent following a broker upgrade. 