The simplest explanation is that the stock market is a marketplace of buyers and sellers. There was a big selloff in March, then we ran out of people willing to

The simplest explanation is that the stock market is a marketplace of buyers and sellers. There was a big selloff in March, then we ran out of people willing to sell. How do you price, say, Google? Or Nike? Or anything? There is too much disagreement on how things should be priced for any shares to change hands until we have more information.