The Bombay Stock Exchange benchmark Sensex shot up by 214 points or 1.32 per cent in opening trade today. The 30-share index, which had gained 188 points in the previous session, rose by 214 points to 16,440 points in the opening trade with metals, consumer durables and realty stocks leading the rally. The wide-based National Stock Exchange index Nifty regained the 4,900-points level by rising 56.70 points, or 1.14 per cent at 4,912 points. Stock brokers said trading sentiments were mainly helped by an overnight gain on the US markets and firming trend on other Asian bourses, triggering widespread buying by funds. The Hong Kong's Hang Seng index was up by almost 1.5 per cent in the morning trade today. The US Dow Jones Industrial Average ended 1.68 per cent higher in Tuesday's trade..