Home prices continue their winning streak, rising for the sixth month in a row in July, according to the Standard & Poor’s 500/Case Shiller index of 20 metro areas. Prices rose in every city in the index for the third straight month.

Nationally, home prices increased 1.2 percent in July compared with a year ago; the second year-over-year gain after two years without an increase. Higher prices, along with low mortgage rates and fewer foreclosures on the market, are pointing to a housing recovery, though there are still challenges ahead.