Reversing all its initial gains, the Sensex at the Bombay Stock Exchange stood 98 points, or 0.5 percent in negative territory, at 19,604, in afternoon deals, a short while ago, after losing more than 150 points at one stage. The market fell on profit-booking by investors, after a recent sharp rally, and as global crude oil prices hovered around two-and-a-half year highs, raising inflation and interest rate worries. Earlier in the morning, however, the Sensex had opened 68 points higher, at 19,770. Other Asian markets in Japan, Indonesia, Singapore and South Korea were trading mixed.