People were shelling their stocks which meant there company was getting more money as some people needed money to pay back loans that they had borrowed but other stock holders started to panic and quickly put there stocks up for sale but people could afford it so they had to lower the prices. Banks went bankrupt as people didnt pay there loans back so banks had to close and people would lose there jobs.
Wall Street is a physical place, which used to be where the NYSE was located. Wall Street is just a metaphor for financial markets.
Hope that helps!
You buy them through either a broker or a broker-dealer.
A stock dealer is like a dealer in any other product: it maintains an inventory of the product and sells it to customers.
A stockbroker arranges transactions between people who have stock they would like to sell, and people who wish to buy it. This is the person you actually buy stock from.
It is possible to own a brokerage that isn't a registered dealer, or a dealer that isn't a registered brokerage, but that's not how it's done anymore--the two functions are almost always combined into a "broker/dealer" company.
No, the New York Stock Exchange is not open on Martin Luther King Jr. Day. See the Related Link below for a list of other holidays that the NYSE is closed for.