The Sensex at the Bombay Stock Exchange rose 163 points, or 0.9 per cent, to 19,315 in early trade, today, ahead of the Union Budget, amid a firm global trend. But after the presentation of the budget the Sensex gave up all its initial gains, and stood 176 points, or 0.9 percent in negative territory, at 18,977 in afternoon trade a short while ago.