A federal jury ruled Ticketmaster and Live Nation ran an illegal monopoly and overcharged fans for years, which is bad for the company and good for concertgoers and rival ticket sellers.

• A New York jury found Live Nation and Ticketmaster liable for adding a hidden $1.72 "monopoly tax" to every ticket at major US venues.
• Internal Slack messages showed executives calling fans "stupid" and bragging about "robbing them blind" with jacked-up parking and add-on fees.
• Live Nation controls 86% of ticketing at major US venues and 70% of tour promotion, locking out competitors through threats and exclusive deals.
• The DOJ settled early for $280 million, less than 1.5% of yearly revenue, but 34 state attorneys general pushed for a full trial and won.
• Live Nation's stock fell over 6% after the verdict while rivals like StubHub rose.

Outlook: The judge could force a breakup and the sale of Ticketmaster, though Live Nation will likely appeal.