The S&P/Case-Shiller Index, a leading indicator of U.S. housing prices, showed annual declines of 3.6% and 3.5% for the 10- and 20-city composites, respectively, for February 2012. This is a new low for February, which has not seen such levels since 2002. But the decline was less steep than in previous months, when it recorded a 3.9% drop in January and a 4.1% drop in December in year-over-year figures.