Gosh me driver, didn´t expect to meet you here, in the hollers of economic "theory" 😉
This article is wrong on so many levels, I couldn´t be bothered to point them all out, but by the grace of you and flauwy the author got some good explanations.
Let me just quote another legend, the great Kostolany:
"The whole stock market just depends on wether there are more idiots than stocks,
or more stocks than idiots."
My favorite explanation of how supply and demand drive price.