Jamie Dimon
Jamie Dimon warned against predicting what's next for the economy.
  • JPMorgan's Jamie Dimon said central banks' outlook from 18 months ago was "100% dead wrong."
  • He cautioned against making definitive economic forecasts, and said to prepare for a range of outcomes.
  • Dimon is doubtful that central banks and governments can manage the coming turmoil.

Jamie Dimon, the billionaire chief executive of JPMorgan Chase and one of Wall Street's most-watched commentators, said forecasters have missed the mark on their economic outlooks, and there's still reason for caution moving forward. 

In a panel at the Future Investment Initiative Summit in Riyadh, Saudi Arabia, the banker called out governments and central banks, and said some more humility should be in order.