About the NASDAQ:
The Nasdaq is an exchange and computer based trading system for buying and selling stocks. It is widely viewed as a overall metric for how US technology have performed on a given trading day. It consists of more then 3,000 popular tech based stocks.

What companies are in the NASDAQ?
There are over 3,000 companies that actively trade within the NASDAQ marketplace. It is home to many big tech stocks like: Alphabet, Cisco, Amazon, Apple, and Microsoft.