At the stock markets, after a positive opening, the Sensex at the Bombay Stock Exchange remained firm, and surged 211 points to 30,154, a short while ago. The Nifty at the National Stock Exchange jumped 57 points to 9,363. And at the foreign exchange market, the rupee appreciated 19 paise to a nearly 21-month high of 64 rupees 7 paise against the dollar in afternoon deals.