TIL that on May 1, 2014, the stock exchange was fined $4.5 million by the Securities and Exchange Commission to settle charges that it had violated market rules

https://en.wikipedia.org/wiki/New_York_Stock_Exchange

https://www.reddit.com/r/todayilearned/comments/1538jsz/til_that_on_may_1_2014_the_stock_exchange_was/