At the stock markets, after a mildly positive opening, the Sensex at the Bombay Stock Exchange moved between losses and gains, and declined 39 points to 28,774, a short while ago.The Nifty at the National Stock Exchange dropped 19 points to 8,878 and at the foreign exchange market, the rupee depreciated one paise to 66 rupees 72 paise against the dollar in afternoon deals.