"as usual, like most things in life, the truth always lies somewhere in between the extremists"
Yep.
The market goes up, the market goes down, the market goes up, the market goes down, ad infinitum.... (Generally speaking, over the longggg haul, it does up more than it goes down.)
When it goes up, it tends to go up higher than funnymentals warrant.
When it goes down, it tends to go down lower than funnymentals warrant.
When, on occasion, it goes up really-really-really-really-really much higher than funnymentals warrant, it takes a long time to come back down again, and will usually go up some, from time to time, along the way.
No grand conspiracies
No secret cabals
No "gambits"
Just mass psychology