The Bombay Stock Exchange benchmark Sensex gained 230 points in early trade on Monday. The Sensex was trading at 16368, up by 177 points. The wide-based National Stock Exchange index Nifty regained the 4,900-points level by rising 66 points in the opening trade. However later it lost some points and was trading at 4893, up by 48 points. Stock brokers said trading sentiments were mainly helped by a strong rally on other Asian bourses after the world markets shrugged off the US discount rate hike. The Hong Kong's Hang Seng index was up by 2.14 per cent, while Japan's Nikkei was up 3.16 per cent in the morning trade