Of Money (2.1)

Here's a screenshot of "popular" data you can get from the Federal Reserve Bank of St. Louis. It's part of their excellent excellent FRED stuff.

At the bottom of that list you can find M2 money. That's a popular number, M2.

Where's M1? Nobody cares about M1. When you start to see M1 on the list of popular data, you'll know Arthurian economics is having an effect.