It pains me to say this zandy, but you are thinking conventionally. You assume all that money is able to go into the markets. I think one of those articles mentions how some of that money got there... Clearly whatever the amount, it is huge and able to move markets over time. Im only saying 5 trillion (if that figure is accurate) is not capable or even allowed to go into equity markets.
The world operates based on interest rates and exchange rates. Now the Fed is buying up high yield corporates, and short term public(govt) debt. These instruments are required, by pensions in particular, in order to meet ancient obligations. And then you have the dollar. The current semi-swoon is good... it allows third-world countries and their debt a breathe! And the ability to sell hard assets(metals, commodities, etc) at a more favorable exchange rate. In another thread you spoke of lumber inflation... it's being created by shortage, not demand! Supply chain shortage. We saw the same thing recently with certain food items like chicken and pork. Plenty to go around, but unable to get the product to market. A shortage. We haven't yet seen the affects of the shutdown. It's coming out in pieces that takes alot of work to keep track of... the other day it was stated Live sports of all kinds will cost the US300 Billion. Pick a business type, any business type, it's all going to show up. Don't just think the obvious. After we get the US figured, lets add other continents... US5 Trillion won't be mind-numbing.