The Bombay Stock Exchange benchmark Sensex rose by over 105 points in opening trade today. It was trading 97 points up at 18,715 a short while ago. In a similar fashion, the wide-based National Stock Exchange Nifty index gained 27 points to 5,627. Brokers said the trading sentiment was buoyed after the country's largest software company Tata Consultancy Services today posted a 26.7 per cent rise in net profit for the first quarter of FY2011-12. Meanwhile, in the Asian region, Japan's Nikkei rose by 0.20 per cent, while Hong Kong's Hang Seng index shed 0.35 per cent in morning trade today.