Billionaire Investor Warns U.S. Economy Could Face ‘Serious Problems’ If Fed Doesn’t Hike Rates Within the Year Posted byMadeline Garfinkle May 6, 2022 Leave a comment on Billionaire Investor Warns U.S. Economy Could Face ‘Serious Problems’ If Fed Doesn’t Hike Rates Within the Year Investor Sam Zell voiced disapproval of the Fed’s decision to raise interest rates by 50-basis points, saying the economy could be in trouble if they don’t hike rates up to 100.