Markets need to brace for "unsettling volatility," Mohamed El-Erian told CNBC on Friday.
The top economist predicted the S&P 500 could retest June lows due to signs of dysfunction in US Treasuries and money markets.
But you just can't avoid the macro factor right now," he said in an interview on CNBC on Friday, predicting that the S&P 500 was set to retest lows near 3,600.
The S&P 500 already made a start downwards since the Fed delivered another 75-basis-point rate hike on Wednesday, when stocks notched their steepest one-day decline since the pandemic.
"They can create very unsettling volatility, not just volatility," he said, noting that turmoil in Treasurys is structural and has largely been exposed to the Fed's quantitative easing, which doubled its balance sheet to $8.9 trillion.