► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />The Financial Conduct Authority is embarking on a David and Goliath investigation into the UK's wholesale banking industry. Lex's Rochelle Toplensky and Oliver Ralph discuss why investigate now, or at all, when it is unlikely to change bank behaviour.<br /><br />► Lex: http://bit.ly/1I14JZF<br /><br />► FT Business: http://bit.ly/1KUK08s<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes