Erasing almost all its early gains, the Sensex at the Bombay Stock Exchange stood just 3 points in the green, at 20,691, a short while ago. Earlier, in the morning, broad-based buying had lifted the Sensex 100 points, or 0.5 per cent, to a fresh 33 month high of 20,808, amid rising global markets. Other stock markets in Japan, China, Indonesia, South Korea, Hong Kong, Taiwan and Singapore logged gains of between 0.2 per cent and 2 per cent, today, as strengthening economic and corporate earnings data boosted confidence in a global economic recovery. The US Dow Jones Industrial Average had gained 0.7 percent, overnight, as investors cheered the latest round of US blue-chip earnings.