Home prices in much of the nation increased in May according to the S&P/Case Shiller Home Prices Indices (HPI) released on Tuesday. May was the second straight month when both the 10 and 20-City composite indices increased. When compared to May 2010, however, only one Metropolitan Statistical Area (MSA), Washington DC, reported an annual increase and that was a modest 1.3 percent. On a non-seasonally adjusted basis, the 10-City Composite increased 1.1 percent in May and the 20-City was up 1.0...