(Bloomberg) -- Profits and losses aren't usually thought of as a consideration for central banks, but rapidly mounting red ink at the Federal Reserve and many peers risks becoming more than just an accounting oddity.

The bond market is enduring its worst selloff in a generation, triggered by high inflation and the aggressive interest-rate hikes that central banks are implementing. Falling bond prices, in turn, mean paper losses on the massive holdings that the Fed and others accumulated during their rescue efforts in recent years.