Recession is likely to replace inflation as the driver of the economy in 2023, Mohamed El-Erian said.
The global economy and investment portfolios would face a bigger range of potential outcomes, he said.
The top economist warned US inflation will stay stubborn at around 4% because the Fed acted too late.
"In this new year, recession, actual and feared, has joined inflation in the driver seat of the global economy and is likely to displace it," El-Erian said in a Financial Times opinion column Monday.
"They should keep an open mind, if only to avoid repeating the mistake of prematurely dismissing inflation as transitory," he added.