Mortgage rates were little changed Tuesday following the release of mixed economic data. This morning, the June S&P/Case-Shiller 20-city home price index rose 2.3% from May and was 0.5% higher than one year ago, the first annual increase since September 2010. Consumer Confidence fell sharply to 60.6, the lowest reading since last November. Results from today’s 2-year Treasury auction will be released at 1:00 PM.