Ken Goldstein, an economist with the group, insisted that with the US economy posting four consecutive months of growth, it appears the recession is bottoming out.Meanwhile, the organisation's Coincident Index remained flat in July, after posting losses every month since October 2008.The three main contributors to positive growth in the Coincident Index were industrial production, personal income and manufacturing and trade sales, the group said.Meanwhile, non-agricultural payroll employment data created heavy downside pressure.Elsewhere, Bloomberg reports that the value of the dollar as the global reserve currency has come under renewed scrutiny this week.Speaking at a conference in Bangkok, Joseph Stiglitz, a Nobel-prize winning economist and professor of economics at Columbia University, said that the greenback holds "questionable" value as the global reserve."The dollar is not a good store of value. Right now, the dollar is yielding almost no return and yet anybody looking at the dollar has to say there's a high degree of risk," he said.