The least restrictive measurement of a country’s money supply.
The island nation of Stankonia does not have a central bank. Rather, it employs a 100% barter system for commerce. In this type of economy, anything that is perceived to have trading value would be included in the “broad money” bucket. Conversely, in the U.S., the dollar is the store of value and anything that can be converted to this currency (cash in circulation, funds held in bank accounts, money market investments, etc.) would be considered “broad money.”
In this type of economy, there are wealth gaps, needs for laws dedicated to stopping financial malfeasance, and economic crises every 70-80 years.