[https://amp.ft.com/content/820d45aa-d3fe-4042-9115-49d8094e1f01?__twitter_impression=true](https://amp.ft.com/content/820d45aa-d3fe-4042-9115-49d8094e1f01?__twitter_impression=true) The trading app Robinhood has agreed to pay $65m to settle charges from US securities regulators that it failed to provide its customers with the best prices for trades on its platform.