Commercial banks’ excess reserves held at the Central Bank rose to an average of around $ billion in the first half of 2013, from a daily average of nearly $ billion in the first half of 2012.
Press briefings were held even prior to activating the buffer (in December 2018) to explain the policy decisions being recommended (in May 2019). There is a long history of central bank communication on monetary policy including regular press conferences following monetary policy decisions. Communication on macroprudential policy may have a shorter track record, but it is highly relevant nevertheless.