Home prices pulled, at least temporarily, out of their downward spiral according to the S&P/Case-Shiller Home Price Indices (HPI) released on Tuesday. The National Index rose 3.6 percent in the second quarter of 2011, increasing in each of the three months of the quarter following the first quarter when the index fell 4.1 percent. S&P, however, attributes the recent improvement to seasonal market forces and, when seasonally adjusted, the increase is only 0.1 percent. The National Index had...