The Bank of Japan extended targeted loans to banks to spur long term investment. The Fed supplemented two rounds of QE with “operation twist” – of purchasing longer term treasuries against sale of short-term treasuries in an effort to depress the entire yield curve rather than  10  BIS central bankers’ speeches  just its short end.
Last week, it also began publishing the expected interest rate path for the coming years. The ECB, as noted earlier, is providing three-year loans to banks. What of emerging economy central banks? They too had resorted to unconventional measures although their policy rates did not hit the zero lower bound.