Stocks go up and down based on what the MASSES think it will do. Doesn't have to be based on earnings, dividends, economy at all. There been enough studies where people throw darts at newspaper or monkeys throw darts and stocks have done well. There are more years of market going up than down, so most people are use to the market heading up, and seldom short selling especially in most retirement accounts, most options to get flat only, but big money can be had when stocks drop like a rock. I have often found it funny, people have most money in stock market at highs cause of greed, then get sizeable loss when markets plummets.