► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />John Authers reports on a hectic day when a bearish outlook from Caterpillar, an intervention from Brazil's central bank, and a hawkish speech by Janet Yellen whipsawed markets. <br /><br />► Authers’ Note: http://bit.ly/1Liu16x <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
