Key TakeawaysBest Buy shares rose 15% Thursday after the electronics retailer beat second-quarter estimates and lifted its profit projections for the year.Revenue and net income beat estimates for the quarter, despite declining comparable store sales.Best Buy lifted its profit projections despite expectations that comparable sales will decline amid "uneven" behavior from customers. Best Buy (BBY) shares surged Thursday, reaching their highest point in more than two years, after its second-quarter earnings s ...