Quote from makloda:
My honest answer. Daily price swings at these levels are random.
Can they be random when they are the result of intentional actions by people? They may be unpredictable some (or most) of the time, but that is not the same as random.
Unpredictable does not imply irrational either. Irrational means there is no coherent reason for anyone to buy or sell in this fashion. But that is ridiculous - one can think of many perfectly rational reasons to both buy or sell stock at current prices and also at higher or lower prices too.
Too many people on this thread are confusing the term "irrational" with "I am unable to predict this" or "I can't make sense of what is happening". The likelihood is that it is them and their way of thinking, not the market, that is irrational here.