Top economist Mohamed El-Erian once again warns of the 'biggest Fed policy mistake in several decades'

• Mohamed El-Erian has once again warned of Fed policy mistakes, following the past year's aggressive monetary tightening.
• "I fear that this may well end up being the biggest #Fed policy mistake in several decades," the top economist tweeted.
• He cited financial commentary that suggested the Fed's recent bank stress tests failed to examine the impact of high interest rates on lenders.

Top economist Mohamed El-Erian has once again warned that the Federal Reserve's recent monetary policy choices could turn out to be their biggest mistake in decades.