Nancy Tengler, Laffer Tengler Investments CEO, joins 'The Exchange' to discuss DocuSign, Stitch Fix and Vail Resorts stocks ahead of their earnings report today. For access to live and exclusive video from CNBC subscribe to CNBC PRO: https://cnb.cx/2NGeIvi  » Subscribe to CNBC TV: https://cnb.cx/SubscribeCNBCtelevision » Subscribe to CNBC: https://cnb.cx/SubscribeCNBC Turn to CNBC TV for the latest stock market news and analysis.