Stock prices are discounted future profits for about 15 to 20 years. Those profits are still there when Corona is over. From that perspective, why should share

Stock prices are discounted future profits for about 15 to 20 years. Those profits are still there when Corona is over. From that perspective, why should share prices fall by more than 5-10% for every year that Corona is locking down the economy? Thats the theory. In practice stock prices wildly oscillate around expected value (which is a gradual curve up and to the right), with no apparent logic. As shiller points out in irrational exuberance, stock markets do not consistently reflect expected long term returns.