The S&P/Case Shiller composite index of 20 metropolitan areas was flat compared to the month before on a seasonally adjusted basis. A Reuters poll of economists had forecast a gain of 0.1 percent
On an unadjusted basis, price gains slowed with the index up 0.2 percent compared to a 0.9 percent gain in July.
Continue Reading Below
The annual rate of decline improved, with prices in the 20 cities down 3.8 percent compared to a year over year decline of 4.1 percent the month before. Still, it fell shy of expectations for a decline of 3.5 percent in August.
"The good news is continued improvement in the annual rates of change in home prices," David Blitzer, chairman of the index committee at Standard & Poor's, said in a statement.
"In spring and summer's seasonally strong period for housing demand, we cautioned that monthly increases in prices had to be paired with improvement in annual rates before anyone could declare that the market might be stabilizing."
(Reporting by Leah Schnurr, Editing by Chizu Nomiyama)