After a weak opening, the Sensex at the Bombay Stock Exchange remained subdued, and had declined 306 points, or 1.1 percent, to 26,513 a short while ago .The Nifty at the National Stock Exchange had dropped 133 points, to 8,164. Other key Asian markets in Japan, China, Hong Kong, South Korea and Singapore were trading mixed and at the forex market, the rupee had depreciated 51 paise, to 67.76 against the dollar in afternoon trade. The rupee fell amid a stronger dollar overseas, and weakness in the domestic equity markets.