U.S. stocks are inching higher in early trading, but the market is still on track for a second losing week in a row. According to AP, investors have been discouraged this week as political wrangling over the new health care law led to a partial shutdown of the government that is now in its fourth day. The Dow Jones industrial average was up 17 points, or 0.1 percent, to 15,013 after the first few minutes of trading Friday. The Standard & Poor\'s 500 index was up three points, or 0.2 percent, at 1,682. The Nasdaq composite was up 15 points, or 0.4 percent, at 3,790. The S&P has finished higher only twice in the past 11 days as disgust over the budget impasse grows. The index is down 0.5 percent for the week.