What to watch for the week ahead on Wall Street

In the week ahead, Wall Street eyes earnings results from Sotheby's (BID), Best Buy (BBY), Ambarella (AMBA), AutoZone (AZO), PetSmart (PETM), Abercrombie and Fitch (ANF), Costco Wholesale (COST), Staples (SPLS), and Foot Locker (FL).