The U.S. Department of Justice (DOJ) has filed a lawsuit against Live Nation Entertainment, the parent company of Ticketmaster, accusing it of anticompetitive practices and seeking to undo the 2010 merger between the two companies. Filed on Thursday, the DOJ's lawsuit alleges that Live Nation has created an illegal monopoly in the ticketing and concert promotion industry, controlling 70% of U.S. ticket sales. The suit is based on a wealth of internal communications, including emails, that provide a rare glimpse into the company's operations. Attorney General Merrick Garland stated that the goal is to foster more competition in the market, which could potentially lead to lower ticket prices. However, experts warn that significant changes may not happen immediately. The lawsuit has already impacted Live Nation's stock, with Northcoast downgrading it to neutral from buy. The case has significant implications for the sports industry, which accounts for over 60% of Ticketmaster's volume.