Central bankers, more generally, are typically able to provide short- or medium-term narratives to financial markets. US Federal Reserve Board Chairman Ben Bernanke provided his own by pledging that US short-term interest rates would remain very low, and the Bank of Japan’s new chairman, Haruhiko Kuroda, has just provided another by saying that he will double the money supply so that inflation reaches 2%.
更一般地说，央行行长通常都有能力向市场提供短期和中期故事。美联储主席伯南克也这么做了——他承诺美国短期利率将维持极低水平；日本银行新行长黑田东彦最近也如法炮制了一次——他宣布会将货币供应量扩大一倍，让通胀达到2%。