Home Depot Inc.’s stock HD rose 0.9% in premarket trade Tuesday, after the home-improvement retailer beat estimates for its second-quarter earnings, back its guidance and announced a $15 billion share buyback program. The company posted net income of $4.659 billion, or $4.65 a share, for the quarter, down from $5.173 billion, or $5.05 a share, in the year-earlier period. Sales fell to $42.916 billion from $43.792 billion a year ago. The FactSet consensus was for EPS of $4.45 and sales of $42.193 billion. Same-store sales fell 2%, to beat the FactSet consensus for a 4.5% decline. “While there was strength in categories…