If we take a look at back about 50 years ago in 1970 the markets in US was command market, this means that the products that were made were directed by the government to be made and even the price on which it should be sold was directed by the government. Currently the markets are free markets in which the production of goods are initiated and directed by the sellers and the prices of the products are also decided by them.
The stock market crash caused everyone to take the money out of banks, but he banks were running out. the reason for this was because the money left in stocks lost value.