Equity trades worth billions of pounds are made everyday in London's financial district. In a new FT video series, City editor Jonathan Guthrie looks at the formulas behind stock valuations and what investors are willing to pay for shares<br /><br />► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<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
