The monetary surprise last week came not from the ECB or the Federal Reserve, but from the Bank of Japan. In monetary terms, the Bank of Japan has gone further than the other two central banks in recent years. Where those two banks fixed the quantity (of bonds to be bought), the Bank of Japan (BoJ) fixed the price. So then, as a central bank, you are obliged to buy up everything on price. As long as a central bank has credibility, the market will usually do the job for you. But in December, the BoJ decided to raise the price ceiling from 0.25 per cent to 0.50 per cent. Since Kuroda, who shaped this policy, left in March, it was expected that the policy would be abolished soon. This has taken longer than expected. The Yield Curve Control (YCC) policy was unsustainable because it had become