Yes of course human stupidity can affect the movement of the market. In everything and aspect here in world, human stupidity is the most thing that can affect. It is very hard to prevent the effect of the human stupidity. They invest with different timing and at different amounts all the time. According to the news the behaviour of the investment is also changed sharply and thus making it completely dependent upon the human behaviour
Exactly correct, stupidity is the main factor why market seems very down, we as an individual create a big impact if we make stupid decisions, but human as we are ofcourse we commit mistakes and that we learned from it.