In volatile trade, the Bombay Stock Exchange benchmark Sensex on Monday rose nearly 105 points in morning trade on emergence of buying by funds and investors. The Sensex was trading at 17,259up by 139 points when reports last came in. The wide-based National Stock Exchange index Nifty also moved up 14 points to 5,151.Brokers said recovery in some of the Asian stock markets after a poor start helped the trading sentiment in the domestic bourses.The Hong Kong's Hang Seng Index was up 0.09 per cent after declining by 1.20 per cent in volatile trade on Monday.