Is there some background/explanation why the Fed discontinued publishing their M3 indicator, circa 2006?
https://www.federalreserve.gov/releases/h6/discm3.htm:


  M3 does not appear to convey any additional information about economic activity that is not already embodied in M2 and has not played a role in the monetary policy process for many years. Consequently, the Board judged that the costs of collecting the underlying data and publishing M3 outweigh the benefits.