Maintaining the upward trend, the Sensex at the Bombay Stock Exchange was trading 17 points in the positive territory at 16,899 in afternoon trade, when reports last came in. The 30-share barometer, which had lost 150 points in the last two sessions, rose by 26 points in opening trade today, with realty, capital goods and oil and gas stocks trading in positive zone. The Nifty at the National Stock Exchange was trading 7 points in the green, at 5,121.