Home prices tumble in 19 of 20 markets

S&P/Case-Shiller index shows slower rates of decline in October

Home prices fell from September to October in 19 of 20 markets tracked by the S&P/Case-Shiller 20-City Composite Home Price Index, with prices in Atlanta and Las Vegas hitting new lows and Midwest markets including Detroit, Minneapolis and Chicago also showing weakness.

Cumulatively, the 20-City Composite was down 1.2 percent from September to October and 3.4 percent from a year ago. The index was up 1.9 percent from a post-crisis low registered in March 2011.