The Dow Jones Industrial Average closed below 10,000 for the first time since July 6, as investors remain concerned about the pace of the US economic recovery despite the weekly decline in unemployment claims. The benchmark index of 30 bluechip stocks closed Thursday down 74.25 points, or 0.74%, to 9985.81. All but two of the 30 stocks included in the DJIA fell Thursday. Shares of banks with large mortgage-backed securities operations closed down slightly Thursday, as well. Bank of America (BAC) and Citigroup (C) were down, and Goldman Sachs (GS) was off nearly 2% although trading volume was 32% lower than the daily average.  Shares of JPMorgan Chase (JPM) closed down 60 cents, and Wells Fargo (WFC) slumped 11 cents. The S&P 500 index declined 8.11 points, or 0.8%, Thursday to 1,047.22 hurt by drops in the energy sector. And the Nasdaq Composite fell 22.85 points, or 1%, to close at 2,118.69 Write to Jason Philyaw.