The Sensex at the Bombay Stock Exchange rose 44 points, or 0.3 per cent, to 17,875 in early trade, today, on sustained buying by funds and retail investors.Later, the Sensex turned volatile, and after swinging between positive and negative territory, stood 26 points, or 0.2 percent in the negative zone, at 17,804 in afternoon deals, a short while ago.The 30-share Sensex has gained over 200 points in the past two trading sessions.