The U.S. Department of Justice (DOJ) has filed a lawsuit against Visa, accusing the company of monopolizing the debit card market, a practice that allegedly drives up costs for consumers and businesses alike. The lawsuit indicates that Visa's actions have limited competition by locking out rival payment platforms, contributing to increased prices of 'nearly everything.' As a result of the impending antitrust litigation, Visa's stock has seen a decline. This legal move highlights a growing regulatory scrutiny of Visa's practices in the payments industry, suggesting potential shifts in the competitive landscape of debit card transactions.