There's no shortage of reasons to like Home Depot's business. It's growing faster than most other national retailers, for one. Comparable-store sales gains sped up to a blistering 6.3% pace last quarter -- from 5.5% in the prior quarter. That acceleration surprised the management team, which responded by raising their full-year revenue outlook. Home Depot is now on track to expand comps by 5.5% in 2017 to ensure another year of market share gains against rival Lowe's, which is expecting to boost its comps by less than 4%.