► Read more at https://on.ft.com/2MISav8<br /><br />Many are now proclaiming this the longest bull market in history. But John Authers shows how the S&P has performed in terms of gold, rather than dollars, and suggests that the bull market of the 1980s and 1990s was far longer.<br /><br />► Subscribe to FT.com here: http://bit.ly/2GakujT<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