Jerome Powel

The Federal Reserve’s efforts to unwind its mammoth portfolio of bonds isn't as easy as advertised.

Central bank officials at their June meeting discussed another issue, this one relating to the mortgage-backed securities on the Fed’s balance sheet. According to the minutes from the June 12-13 gathering, proceeds the central bank is getting from the MBS it holds are running below the capped level of payments it has targeted for runoff later this year. Anything above the cap is supposed to be reinvested.