Just because some (most) investors choose to ignore it, doesn't mean that moves in stock prices are random.
They're not.
Stock prices trend.
It's just math. Or science maybe. Or both, I don't know.
But they do trend. This we know is a fact.
And since last June, the majority of stocks have been appreciating in price. And very few stocks have been falling in price, to the point where there are almost no stocks that are still falling.
So if stocks were not going up in price in this environment, that would be really weird.