Here come home prices ...

Two sets of housing market data will be released at 9 a.m. ET.

The Federal Housing Finance Agency's (FHFA) house price index is forecast to show that home prices rose 0.4% in August, according to Bloomberg.

And, the S&P/Case Shiller report for the same month is forecast to show that prices in 20 major US metro areas rose 0.1% month-on-month, and 5% year-on-year.

According to S&P/Case Shiller, the index of national house prices is within 0.6% of the record high it set in July 2006.

There aren't the similar concerns of a bubble, but the percent change in house prices year-over-year has eased this year. According to the FHFA, that's because many potential buyers find housing unaffordable at these levels, forcing sellers to bring prices closer to what buyers can pay. The agency called this a "potentially significant market shift."

More to come ...