The Sensex at the Bombay Stock Exchange, which had fallen 55 points in opening trade, this morning, on profit-booking, later moved between positive and negative territory, and stood 67 points, or 0.3 percent in the red, at 20,236, a short while ago.Stock markets in Japan, China, Hong Kong, Singapore, and South Korea were trading mixed, today. Over on Wall Street, the Dow Jones Industrial Average had gained 0.3 per cent, overnight.