The Sensex is trading 84 points up at 18751 in the noon trade. Continuing its winning streak for the fourth day the Sensex shot up by 101 points in the opening trade. This follows bullish domestic sentiment and a renewed confidence in the European market recovery after Portugal's successful debt bond auction.The wide-based National Stock Exchange's Nifty which rose by 22.35 points in early trade is now up by 17 points at 5624.The Hong Kong's Hang Seng index was up by 0.44 per cent, while Japanese Nikkei by 0.79 per cent in morning trade. The US Dow Jones Industrial Average closed 0.45 per cent higher in yesterday's trade.