Home prices...

...decreased in the year ended April by the most in 17 months, showing the housing market remains an obstacle for the U.S. recovery.

The S&P/Case-Shiller index of property values in 20 cities fell 4 percent from April 2010, the biggest drop since November 2009, the group said today in New York. From March to April, prices fell 0.1 percent on a seasonally adjusted basis, the smallest decline since July 2010.