Just a quick thought about what is driving the US stock market.  The chart below shows the Wilshire 5000 (representing all publicly traded US equities in red), the Federal Reserve balance sheet (black), and excess reserves held at the Federal Reserve Bank by the largest of private(?) banks (likely a majority of these reserves held by foreign banks).  What you may notice is the rise in equities since '09 correlating with the rise in the Federal Reserves balance sheet until QE ended.  Then a momentary pause in equities during 2015, and another strong leg higher since.  That strong leg higher correlates nicely to the drawdown in the excess reserves held at the FRB, particularly since 2016.