The payment terminals at Swiss retailers were replaced in 2005, Switzerland's stock exchange used the opportunity to withhold a key interface from its rivals – resulting in a huge competitive advance. The move violated antitrust rules, a Swiss court ruled 13 years later, hitting the stock exchange with a 7 million Swiss franc ($6.9 million) fine.

SIX, the stock exchange operator, doesn't have to cough up the fine itself: it sold the payments division to French rival Worldline for about 2.3 billion euros ($2.6 billion) last year. Worldline can appeal the judgment to Switzerland's highest court.