... as for context, two simple facts;
1) Margin debt – the amount of money that investors have borrowed in order to buy stocks – is now at the highest level in history, not only in absolute terms, but also relative to U.S. GDP.
2) The present ratio of total U.S. equity market capitalization to GDP is 2.63. (as in: 263%!)
The historical norm (not the low!) is 0.78. (Which is about 70% below the current level.)