NEW YORK: Wall Street gained on Wednesday with the S&P 500 nearing its highest in more than four months following a strong quarterly showing by Goldman Sachs and promising early data for a potential COVID-19 vaccine.The US lender jumped 2.9% as its trading revenue doubled in the second quarter, driven by big swings in stock and bond markets since March.Morgan Stanley gained 2.0% and Bank of America 1.9% ahead of their results on Thursday, which would wrap up earnings from the big six U.S.