After Tuesday's big fall, the Sensex at the Bombay Stock Exchange gained 106 points, or 0.6 per cent, at 16,678, in opening trade, this morning. After paring some of its early gains, the Sensex still stood 77 points, or 0.5 per cent in the green at 16,650, a short while ago.Other Asian stock markets in Japan, China, Taiwan, and Hong Kong were down between 0.1 per cent and 1.2 per cent.