CNBC U.S. Contributors

Jon Najarian

Joe Najarian
Co-Founder, Najarian Family Office

Jon "DRJ" Najarian was linebacker for the Chicago Bears before he turned to another kind of contact sport – trading on the Chicago Board Options Exchange

He became member of the CBOE, NYSE, CME and CBOT and worked as a floor trader for some 25 years. Today, he is a professional investor, money manager, lecturer as well as co-founder of NajarianFamilyOffice and Rebellion Partners.

Jon developed and patented trading applications and algorithms used to identify unusual activity in stock, options and futures. His HeatSeeker has sniffed out takeovers in numerous stocks and his data has been requested and provided to law enforcement & securities regulators to find those guilty of insider trading.

Jon and his brother Pete founded TradeMonster and OptionMonster, which were rated "Best for Options Traders" by Barrons four years in a row. He developed the first online broker to deploy streaming, desktop-like trading in a web browser.

The brothers are founding members of Investitute.com, a financial education & subscription services company, as well as best-selling authors of both "How We Trade Options" and "The 22 Rules of Investing".

What does Jon Najarian do when he's not investing? Here's a look in our Halftime Report "Trade Off."

Jon's Twitter handle is @jonnajarian.

Disclosures as of 10/20/17:

Jon is long calls AbbVie, Alcoa, American Airlines, Apple, Analog Devices, Anarko, Bristol-Myers, CenturyLink, Deere, Facebook, FedEx, First Solar, Freeport-McMoRan, Guess, Gilead, GLD, Glu Mobile, Hess, HD Supply, JetBlue, KKR, L Brands, LendingClub, Southwest, Micron, Mylan, Netflix, Newell Brands, Procter & Gamble, Qualcomm, TreeHouse Foods, Trinity Industries, Take Two, Twitter, Texas Instruments, United Airlex, US Steel, VIX, Weatherford International, XBI

Short Puts: Equifax, Newmont Mining