The world's three most powerful central banks have stopped moving together — and the gap between them is widening by the week. The Fed is frozen, waiting on data and a new leader. The ECB is preparing to raise rates not because Europe is growing, but because a Middle East war has sent energy prices surging. And the Bank of Japan just spent a record $73.6 billion defending the yen — and lost. What happens when the institutions that set the price of money can't agree on anything?