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- 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.