Recovering smartly from initial losses, the Sensex at the Bombay Stock Exchange had gained 123 points, or 0.6 per cent, to climb above the 20,000-mark, at 20,107, in afternoon trade, a short while ago. But earlier in the morning, the Sensex had declined 135 points, or 0.7 percent, to 19,848 after the International Monetary Fund lowered its forecast for the country's GDP growth rate. Stock markets in Japan, China, South Korea and Singapore had gained between 0.4 percent and 1 percent, today. But Wall Street's Dow Jones Industrial Average had ended 1.1 per cent lower in yesterday's trade.