The following video is part of this week's MarketFoolery podcast, in which host Chris Hill, Jason Moser, and Joe Magyer discuss the latest business news. In this segment, the guys analyze Wal-Mart's latest quarter. Despite being the biggest dividend-paying retailer in the world, Wal-Mart is increasingly facing international threats from the likes of PriceSmart and Tesco Corp., leaving the question of which competitor is the toughest.