FILE - In this July 30, 2014, file photo, George Limperis, a realtor with Paragon Real Estate Group, walks in the backyard of a property in the Noe Valley neighborhood in San Francisco. Standard & Poor's releases S&P/Case-Shiller index of home prices for June and the second quarter of 2015 on Tuesday, Aug. 25, 2015. (AP Photo/Jeff Chiu, File)