OK, let's worry about corporate profits

Two charts showing corporate pre-tax profit as a share of real and gross domestic product.  Real is the inflation adjusted version of gross.  The two graphs tells us that corporations are about the same share of gross, over the history, bottom graph.  But as inflation dropped, profit share rose.  Interpretation, accurate pricing makes for efficient corporations.

But volatility increases, especially since 2000, but starting before that.  Corporate volatility and low inflation low rates and rising government debt all happened over the period since 1980s, starting with the Nixon shock, it seems.