Rising for the second straight session, the Sensex at the Bombay Stock Exchange shot up 387 points, or 2.1 percent. Its biggest single-day gain in seven months to close at 18,745, on Tuesday. The Sensex rose on hopes of aggressive rate cut by the Reserve Bank, and likely relief on the Current Account Deficit front due to falling gold and crude oil prices. The Nifty at the National Stock Exchange spurted 121 points, or 2.2 percent, to 5,689.Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended mixed.