Main Financial Hubs
The second type of exchange is the virtual sort called an over-the-counter (OTC) market, of which the Nasdaq is the most popular. These markets have no central location or floor brokers whatsoever. Trading is done through a computer and telecommunications network of dealers. It used to be that the largest companies were listed only on the NYSE while all other "second tier" stocks traded on the other exchanges.nnThe tech boom of the late 90s changed all this; now the Nasdaq is