At the domestic stock markets, the Sensex continued its upward march for the sixth straight day, today, but the rupee ended weaker against the dollar.The Sensex at the Bombay Stock Exchange gained a modest 56 points, or 0.2 percent, to close at 32,242. The Sensex had gained over 520 points in the previous five trading sessions. The Nifty at the National Stock Exchange rose 7 points, to 10,087.At the forex market, the rupee depreciated 12 paise, to 64.12 against the dollar.Gold surged 650 rupees, to 31,000 rupees per ten grams in Delhi. And Brent crude oil futures climbed 20 cents, to 55.36 dollars a barrel.