Economically, the velocity of money reflects how quickly people spend a new dollar once they get it. Technically, it’s the GDP growth that a rise in the money supply can’t explain. The general idea holds that if people are well off and feeling confident they will spend new dollars quickly and each dollar will change hands many times before the end of the year.
Here is an amusing tale about money velocity that I got from the Adam Smith Institute:
It is the month of August, on the shores of the Black Sea. It is raining and the little town looks totally deserted. It is tough times, everybody is in debt and everybody lives on credit.
A rich tourist comes to town. He enters the only hotel, lays a 100 Euro note on the reception counter and goes to inspect the rooms upstairs in order to pick one.