In addition, since the 1990s there had been a trend towards deregulation. Another lesson from the crisis is that macroregulation is not neutral: insufficient regulation led to the crisis, and it follows that it is necessary to combine monetary policy and regulation. In addition, central banks should not only be responsible for monetary policy, but also for macroprudential issues.
In the end, we have learned that financial markets do not necessarily move to equilibrium. Government intervention is necessary to achieve stability. Macroeconomic policy alone was not sufficient to prevent the crisis, especially in advanced economies.