The domestic stock markets cheered the surprise rate cut by the Reserve Bank. So after a very strong opening, the Sensex at the Bombay Stock Exchange remained extremely firm, and had shot up a mammoth 667 points, or 2.4 percent, to regain the 28,000-mark, at 28,014 in afternoon trade, a short while ago, on across-the-board buying by investors. Earlier, in morning trade, the Sensex had surged over 600 points. The Nifty at the National Stock Exchange also posted huge gains, and had spurted 200 points, to regain the 8,400-mark, at 8,478 a short while ago. Other key Asian markets also rallied, with key stock indices in Japan, China, Hong Kong and Singapore gaining between 0.3 percent and 3.5 percent, today. But the US Dow Jones Industrial Average had ended 1.1 per cent lower in yesterday's trade.