Despite estimate-beating results from home improvement retailer Home Depot Inc., U.S. stocks are lower in early afternoon trading on Tuesday. The S&P 500 (SNPINDEX: ^GSPC) and the Dow Jones Industrial Average (DJINDICES: ^DJI) (DJINDICES: $INDU) are down 0.41% and 0.45%, respectively, at 12:25 p.m. EDT.