Lex's Rob Armstrong and Oliver Ralph discuss the rationale behind Russian energy group Rosneft's decision to buy a stake in Italian tyremaker Pirelli - and explore the Italian company's increasingly complex list of shareholders.<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Subscribe to the Financial Times on YouTube; http://goo.gl/vUQx5k<br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
