Once upon a time in the world of finance there were three kingdoms the most widely recognized was also the most snobbish and wealthiest its subjects were affluent and known worldwide. Its king was NYSE (New York Stock exchange) the king ruled proudly over his subjects.
Every brokerage firm had a stock ticker to provide their customer with trade information on NYSE listed stocks.
The second kingdom was not so well off, it had less subjects and the inhabitants were much poorer than those ruled by NYSE, the king was named AMEX (American Stock Exchange). They could be classified as low middle class.