In fact, the Fed has been under increasing scrutiny since 2008, when near-zero nominal interest rates drove it to become the first central bank to adopt QE. In a push to reduce the cost of borrowing, the Fed purchased long-term assets in the market, injecting liquidity into the financial system.
事实上，自2008年将名义利率降至近零水平、成为首个采取QE的央行以来，美联储被越来越多的人紧紧观察。为了降低借贷成本，美联储从市场上购入长期资产，将流动性注入金融系统。英格兰银行和欧洲央行此后也采取了类似措施。