Sensex closes 40 points up;
Mumbai, May 18 Erasing early losses, the Bombay Stock Exchange benchmark Sensex today closed 40 points up as funds returned to buying mode encouraged by robust Q4 numbers by corporate Larsen & Toubro.
After surging nearly 175 points, the Sensex erased gains and closed 51 points lower, breaking a five-day upsurge, after S&P's warning that India may lose its investment-grade rating spooked investors.