► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />Tesla shares have fallen 14 per cent since the electric car company launched its latest model. Lex’s Joseph Cotterill and Oliver Ralph discuss whether cheaper petrol will erode the attractiveness of its cars.<br /><br />► Lex: http://bit.ly/1I14JZF<br /><br />► FT Markets: http://bit.ly/1J5HNd3
